Got to thinking we should start an FAQ for the Isuzu board. Just Basic stuff like the type of motors, trans, t-cases, axles, ratios...all the stuff that people usually ask about but dont' take time to search for. Maybe that would save on posts like what axle or motor do I have. I known because in the past I asked questions like that, if we could get an FAQ thread at the top that says something like read this before posting I think it would be helpful to newbie or people with questions about zu parts. Just My $.02

TROOPERS

Pre-89's came with a 2 door LWB option, but 89 and after didn't.

Pre-87's had the round headlight grill.

Pre-88's had the carbuerated 4 cyl's (84 and 85 I believe had the 1.9, and 2.3 after that)

88 and up had the EFI 2.6 and 89 and up had the optional 2.8, and I believe somewhere I heard of some (maybe canadian) 91's had 3.1's.

84-87 had the 8 bolt/10 bolt (talk of some 87's with a 10/10 combo)

88 and up had the 10 bolt/12 bolt

I dont know for sure, but I think the auto's weren't an option until 88.

84-85 I think had the 4 spd, 86 and 87 had the 5 and a totally different t-case than the 88 and later MUA5.

Diesels in 86 (maybe 85, dunno)


Paul

gear ratios for troopers are 4.56 (common) and 4.77 (RARE). The 89 SWB 2 dr RS model will always have them. Look for the 'snowflake' wheels on the other models as that usually means they have the 4.77's.

5.38's are available thru tera as well as 3.07:1 low range gears for the MUA5 trans/t-case

either that or people can take the time to read their owner's manual... j/k :flipoff2:

I'll add some stuff too.

as far as i'm concerned manual hubs only came with the automatic transmissions and the manual transmissions only came with the auto hubs, which sounds very dumb and sucks for those trooper owners (including myself) who have a manual transmission. autos suck!!! change to manual hubs... NOW!!! Oh, and the manual transmissions crawl ratio in 4lo is 37:1.

-if you are wondering if you have the 4.77's, the option code is "SL2" which would be found underneath the hood.

:mad: also older troopers are a bitch to work on. japs went outta control with the vaccum hoses. can even be a nuisance to check spark plugs when only able to use one arm because it's so damn cramped under the hood, was because of emisions. for the fuel injected 2.6L's that is, others with this 4-stroke must sympathize. ;)

Colin

holy crap...................where to begin :rolleyes:

i will start with a little diff info:


Some more info on the 10 bolt front vs. 10 bolt rear...


THE RING GEARS AND THE PIONION GEARS ARE CUT
BACKWARDS FOR THE FRONT END, HOWEVER THE CARRIER THAT THE RING GEAR BOLTS TO IS THE SAME ON BOTH THE 10 BOLT FRONT & THE 10 BOLT REAR. THEY USE THE SAME BEARINGS FOR THE CARRIER AND THE PINION GEAR.

THE 10 BOLT REAR WAS THE STANDARD SIZE ON ALL PICKUPS AND TROOPERS FROM 81 THRU 87 AND SOME PICKUPS UP UNTIL 95, DURING THIS TIME PERIOD THE FRONT WAS, I BELIEVE, AND 8 BOLT RING GEAR.

STARTING IN 88 THE REAR WENT TO A 12 BOLT REAR AND A 10 BOLT
FRONT. THE NEW 10 BOLT FRONT, THE DESCISION TO USE PARTS OF THE REAR END DESIGN IN THE FRONT END WAS STRICYTLY FROM A COST CUTTING STANDPOINT.

ALSO THE LIMITED SLIP THAT WAS USED IN THE EARLY 10 BOLT REAR COULD BE USED IN THE NEW 10 BOLT FRONT WHICH ACTUALLY CAME FROM THE REAR DRIVE TURBO IMPULSE. THE IMPULSE HAD THE TRUCK REAREND WITH COIL
SPRINGS AND 3.90 GEARS.

ALSO THE HOUSING FOR THESE 2 10 BOLT DIFFS ARE COMPLETELY DIFFERENT. ONE HAS AN OFFSET FOR THE FRONT AXEL AND FOR THE FRONT SUSPENSION.



FURTHER ANSWERS:

ON THE GEARS: THE RING GEAR ON THE REAR IS THICKER THAN THE ONE ON THE FRONT. EVEN THOUGH THEY ARE THE SAME DIAMETER AND RATIO.

THIS WAS DONE IN ORDER TO MOVE EVERYTHING CLOSER TOGETHER SO THE
DIFF WOULDN’T BE SO BIG AROUND. ODDLY ENOUGH, YOU CAN PUT THE FRONT AXLE ASSEMBLY FROM AN 87 TROOPER IN AN 88 AND GAIN ABOUT 2 INCHES OF, CLEARANCE AROUND THE OIL PAN. THE DIFF, BECAUSE IT IS AN 8 BOLT CIRCLE, SAME RATIO, SAME WIDTH WITH THE SAME SIZE BRAKES.


comparison image:

rear on the left - front on the right-

notice the differences in casting:

front on the left - rear on the right..................note the thinner ring gear.


these units are not interchangable front to rear application:

That is sweet guys keep it coming maybe the mods could give us a little help and keep this thread up at the top where everyone can see it. I will thow in a little in here....my 1987 had the 10/10 combo and my owners manual shows there was also a diesel that year beacuse it has all the alternate instructions beside the stuff for my gas motor (i've never seen one though). I have also never seen a manual that didn't have Auto hubs (yes I will also confirm that they suck) or opposite for the Auto trans with manual hubs. I also believe 88 was the first year for the auto like Paul said. This probably well known stuff (just going for basics)but the 12 bolt is very strong = to Dana 44 or better, the front end is Ok???? for moderately sized tires...tierods and cv shafts being the weak points. Auburn Limited slip, ARB, and the discontinued Lock Rite for traction in the front end. ARB and/or welder for the 12 bolt rear. Thats all I have for now. Keep up the good work.

how about wheelbase? 1st gen 2dr lwb and 4 door are both 104" (IIRC) cant remember what the rs is, 90 or 95"?

1st gen 12 bolt WMS to WMS is 58"

need some leaf spring dimensions

width?
eye to eye?
front eye to centerpin?

I'll be able to throw more numbers out when i pick mine up this/next weekend.

Yeah...
Sorry finally got around to getting those measurements for the rear springs.
Something like this for a completely unloaded stock spring, no add-a-leaves.

44 in. eye to eye
2.25 in wide
4 leaves including the overload spring
I also measured for center pin to eye on boths sides got 25 in. on one side and 21.5 on the other which adds up to 46.5 so about 2.5 inches of lift probably less than that when they have weight on them. Thats all I have for now correct me if you think or have seen different.

PIC:
http://www.freewebs.com/lorne/MVC%2D042F.JPG

One other thing maybe we could get some more info about the transmission and transfercases ratios and such I know all the ratios are in the factory manual but i can't find mine at the moment.

my stock rear troop leaves are 47" eye to eye actual steel length, 2.5" wide. spring side to side is 40 1/4" pin to pin.


Rodeos came with the 3.1l GM motor in 91 and also ran a GM 10blt rear axle, came with a 4:30 ratio.


Amigo's werent sold in Canada

VX's werent sold in Canada.

Thats all I know because I'm from Canada:flipoff2:

I just tore my old 10 bolt apart. Thought I would throw out a little info on it for the guys that have older first gens. (81-87)
The shafts are 1.50 in. diameter and then neck down to 1.10 in at the splines and there are 17 of em'.

I don't know how strong these axles are I ran 32's on it for about 6 months open diff. so thats pry not a very good indicator. If someone has run this axle welded or locked otherwise post up tell us what it can handle before you need to upgrade so that guys going low budget can get an idea for tire sizes. I know that there might not be many guys out there running these but tryin to help those that are.

well I'm gonna weld mine and try to get a set of 33's on her. I'll let yall know what it can take behind my monster 2.3

Originally posted by Uzi
One other thing maybe we could get some more info about the transmission and transfercases ratios and such I know all the ratios are in the factory manual but i can't find mine at the moment.

ya, those can be hard to find, my trooper didn't come with the manual, but i recently picked it up from the previous owner. here's the ratios right out of the 1988 owner's manual...

Manual Transmission with Transfercase:

Transmission ratios -
Reverse: 3.873
First: 3.767
Second: 2.314
Third: 1.404
Fourth: 1.000
Fifth: 0.809

Transfer ratios -
High: 1.000
Low: 2.283

Automatic Transmission with Transfercase:

Transmission ratios -
Reverse: 2.394 : 1
First: 2.804 : 1
Second: 1.532 : 1
Third: 1.000 : 1
Overdrive: 0.705 : 1

Transfer ratios -
High: 1.000
Low: 2.660

Here's some info for the OG troopers (from 86 model owner's manual)

Curb weight (vehicle w/ fuel and coolant)

::Gas DLX/LS:: | :: Diesel DLX/LS::

Front ::1676/1673:: | ::1849/1846::
Rear ::1570/1586:: | ::1590/1606::
Total ::3246/3259:: | ::3439/3452::

Technical Data

ENGINE: 4ZD1/C223T

Displacement - 2.254 liters/2.238 liters

Compression - 8.3/21.0

Firing Order - 1-3-4-2/1-3-4-2

Ignition Timing BTDC - 6*/800 / --

Injection Timing BTDC - -- / 10*

Spark plug gap - .04 in./ --

Oil capacity - 4.2 liters/5.7 liters

Coolant Capacity- 8.0 liters/10.6 liters

Mechanical (cable) Clutch

Size - 215 mm (8.46 in.)

Pedal free play - 15 mm (.59 in.)

RATIOS

1st - 3.785
2nd - 2.171
3rd - 1.413
4th - 1.000
5th - 0.855
Rev. - 3.753

Hi - 1:1
Lo - 1.87:1 (sucks!!!!)

Lube capacity - 4.6 liters

AXLES

Front/Rear

Ratio - 4.555:1/4.555:1
Lube capacity - 1.0 liters/1.5 liters

Fuel tank - 21.9 gallons

Matt posted this info and i keep going back to it... so it would probably be useful in this thread....


the isuzu 12 bolt rear is a very underrated axle IMHO
the older ones....like 88-95 are a little narrower, i want to say 56" is what comes to mind....i'll try to get a real measure fore you.

the later ones (96-99) are a couple inches wider (ase the newer troopers got wider)

there is an ARB available for the early and late version.


RD44 - fits the 87-95's w/ 1.32" 26 spline axles

RD85 - fits the 98+ w/ 1.50" 23 spline axles


so early axles:

more common
narrower: 56" +/-
smaller shafts BUT....higher spline count
ring gear roughly sized like a Dana 44
locker: ARB
gears: 4.56, 4.77. 5.38


late ones:

little wider
little bigger brakes
larger shafts, BUT lower spline count
Larger ring gear - roughly like a 60
locker ARB
gears: 4.30's (i think) (5.38's available Internationally)


-Rob

PAGE (http://www.4x4wire.com/forums/showflat.php?Cat=&Board=UBB68&Number=415804&Forum=,,,,,,,,,,,,,,,,All_Forums,,,,,,,,,,,,,,,,&Words=&Searchpage=9&Limit=25&Main=415804&Search=true&where=&Name=5240&daterange=&newerval=&newertype=&olderval=&oldertype=&bodyprev=#Post415804)

86 and 87 troopers torsion bars are different and shorter and will not interchange with 88+ on Trooper.

86 and 87 rear axles are 2" narrower than 88+ differentials.

The diesel had a unique 5 speed transmission with integrated transfercase and does not interchange with other isuzu engines.

A canadian version of the C223T diesel used the Borg Warner T-18 transmission. found in Pup and canadian S10 models.

The 4jb1-t 2.8L diesel was offered in many countries for many years in the trooper. Only found in USA in off road equipment like Mustang Skid Steers.

Britain and other countries had a 3.1L diesel available.
Currently, a new common rail 3.0L diesel is available elsewhere in the world.

All of these engines are stronger and have more torque than the C223T.
The C223T with pre-2.0 rods, were known to break them too often.
2.0 rods can be identified by the bottom end. virtuallly a solid block of steel, with NO radius around the rod bolts. Basically a solid rectangle. more common 1.5 had some radius of material supporting rod bolts.

The 2.8 engine is reputed to be one of the finest 4 banger diesels ever made.


* Only the C223T diesel option was ever available in the USA. This is a 2.2L turbocharged engine.
* Diesel Kiki (Robert Bosch) licensed injection pump.
* Vacuum pump on back of alternator for power brakes.
* Compression ratio 21:1
* 80 hp 127 ft. lb torque.
* No intercooler/aftercooler
* crankshaft endplay max .030"
* Thrust bearings fall out with wear
* 3 different rods used in USA. commonly known as: 1.0 1.5 2.0
* Crank is tuftrided. therefore, factory never made oversize journal bearings.
* Harmonic balancer is two piece. with rubber mid which does shear/break causing timing to be off.

What the hell does "SOA" mean?

Spring Over Axle...

Daniel

so how wide is a 12 bolt from early models. i always thought they were 58 inches, is that not right???

yeah should be 58 inches

how wide is the "widetrack" 12 bolt found in troops post 95

~63" i believe

as far as i'm concerned manual hubs only came with the automatic transmissions and the manual transmissions only came with the auto hubs, which sounds very dumb and sucks for those trooper owners (including myself) who have a manual transmission. autos suck!!! change to manual hubs... NOW!!! Oh, and the manual transmissions crawl ratio in 4lo is 37:1.

-if you are wondering if you have the 4.77's, the option code is "SL2" which would be found underneath the hood.

Hmmmm....the '90 pup i rescued from my neighbor's backyard has manual hubs and manual trans.
I don't see "SL2" on the option plate but the wheels look like 'snowflakes' to me. Anybody have pictures?

...as far as i'm concerned manual hubs only came with the automatic transmissions and the manual transmissions only came with the auto hubs, which sounds very dumb and sucks...Contrary to your declaration, my '90 Trooper came w/ auto trans + auto hubs, which, at 180K miles still work fine for my uses. YMMV, etc.

can sombody hellp me i am doing a sas on my 86 trooper and wount to know is waganeer stock gears 4.56's and does tera low make crawling gear for a 86 thanks for yall help i am new to the trooper stoff

^^yeah, my ex gf's 91 was auto with auto hubs. i've seen manual hubs on both and auto hubs on both. it doesn't even seem to corespond with options packages either, i've seen base models with autos and ls's with manuals...

hobbsm, waggies don't come with 4.56's, and tera doesn't make gears for the pre-88's.

Maybe could include sections on what will swap, what won't, where to look for parts, good parts sources, bad ones, known problem resolutions, etc?

Hey guy's , new to the forum, have a ? about the gearing in my 91 amigo. I'm looking for a differential to weld up for trail use, and need to know what ratio I currently am running. It's a 2.6 liter/5 speed combo. Any info would be appreciated.Thanks

im able to get a isuzu rear axle with discs for 80 bux. I believe its out of a 91-94 trooper. What gear ratio would it probably have? Is it 6x6.5? What is the thread of the brake lines?

Violent91 - The gears should be 4.56 and the bolt pattern should be 6x5.5. Can't tell you about the thread on the brakes. You might check with Independent4x.com (TrooperRS here). He's got brake lines for these axles, and is pretty familiar with the necessary conversions.

My transmission siezed last week and I am having a hard time finding a 5 spd for my '89 2.6 L. I am not sure what years/models will fit and am getting no help from the dealer. Has anyone rebuilt thier trans or is it not worth the headache. I had to drive 300km out of the bush to get back home, I am wondering wether it is going to be chewed or workable? Anyone have any advice on this?

matt'suzu, any 4wd isuzu w/ a 2.6 will have that same manual trans behind it. hope this isnt too late :D

Cheers, Thanks for the input but it turned out to be just a circlip that had come off its shaft, siezing up the tranny. So for $50 in circlips and seals, and the biggest bottle of Crown Royal I could find, the g/f's dad, who has his own shop, got it spinning again. Btw, checked the bearings while we were in there and at 250k+ they were mint.

Found this on another site and thought we might find is useful here. I hope this was not out of line!!

Isuzu Trouble codes
12 No tach signal to ECM - No Distributor Reference Pulses{4}
13 Oxygen sensor or circuit
14
Coolant Temperature Sensor Circuit

High Coolant Temperature{5}

14A
High Coolant Temperature{6}

14B
Low Coolant Temperature{6}

15
Coolant Temperature Sensor Circuit

Low Coolant Temperature{5}{7}

16 Same as 15
21
TP Sensor And/Or Idle Switch

MAP Sensor{1}

TP Sensor, Voltage High{5}{7}

Throttle valve switch/Wide Open Throttle (WOT) position sensor, 1989 Manifold Absolute Pressure (MAP) circuit failure
Throttle Position Sensor (TPS) - V6 models
21A
TP Sensor, Voltage High{6}

21B
TP Sensor, Voltage Low{6}

22 Starter signal system/1988 and 1989 fuel cut solenoid circuit failure
TP Sensor

TP Sensor, Voltage Low{5}{7}

No Starter Signal{8}

Fuel Cut Off Relay{4}

23
MAT Sensor

MAT Sensor, Low Temp{7}

M/C Solenoid Circuit{4}

Mixture control solenoid circuit failure - 1987 and 1995 Amigo/Pick-up, 1989 to 1994 V6 models

Power transistor circuit - 1988 to 1994 four-cylinder models

Intake Air Temperature sensor voltage high - turbo, 1989 to 1995 1.6L, 1.8L, 3.2L vehicles
23A
MAT Sensor, Low Temp{6}

23B
MAT Sensor, High Temp{6}

24 Vehicle Speed Sensor (VSS) circuit - V6 models
Pressure regulator vacuum switching valve - 1988 to 1994 four-cylinder, also Impulse non-turbo
25
MAT Sensor

Vacuum Switching Valve{4}{9}

MAT Sensor, High Temp{7}

Intake Air Temperature sensor voltage high - turbo, 1989 to 1995 1.6L, 1.8L, 3.2L vehicles
AIR VSV circuit failure
26
Canister Vacuum Switching Valve{4}

VSV System{9}

27
VSV System{9}

Constant Voltage High From VSV To ECM{4}

Fuel injector driver transistor
31
No Ignition Reference Pulses To ECM{4}

Wastegate Control{7}{8}

No ignition reference to ECM - 1988 and 1989 models
32 Exhaust Gas Recirculation (EGR) system failure
33
MAP Sensor

MAP Sensor, Voltage High{5}{7}

Fuel Injector{9}

33A
MAP Sensor, Voltage High–Low{6}

33B
MAP Sensor, Voltage Low–High{6}

34
MAP Sensor{8}{11}

MAP Sensor, Voltage Low{5}

EGR Gas Sensor Circuit{4}{7}

Fuel Injector{10}

35
MAP Sensor Constant Voltage High{4}

Power Transistor System{9}

36
MAP Sensor Circuit{4}

41
Crank Angle Sensor{9}

Cam Signal{7}

42
Fuel Cut Off Relay{4}

Electronic Spark Timing{5}

Ignition Control Circuit{6}{8}

43 Throttle valve switch/Wide Open Throttle (WOT) position sensor {9}
Electronic spark control failure - V6 models
Idle contact switch always closed (1988 to 1994 four-cylinder, also Impulse non-turbo)
1989 Manifold Absolute Pressure (MAP) circuit failure
Knock sensor (1989 to 1995 1.6L, 3.2L) {8}
44
O2S Lean

Fuel Metering{9}

45
Oxygen sensor (rich condition indicated)

Fuel Metering{9}

51
PROM{2}{8}

Fuel Cut Solenoid Circuit And/Or ECM{3} carbureted four-cylinder models

ECM{6}

MEM-CAL{7}

PROM, Cal-Park & ECM{5}

ROM and/or RAM{9}

52
ECM{4}

EEPROM{8}

ROM and/or RAM{9}

PROM, Cal-Park & ECM{5}

53
Switching Valve And/Or ECM{4}

Vacuum Switching Valve{9}

54
M/C (mixture control) Solenoid Circuit And/Or ECM{2}

Vacuum Control Solenoid And/Or ECM{3}

Power Transistor System{9}

Fuel Pump, Voltage Low{5}{8}

Shorted vacuum control solenoid, Faulty Electronic Control Module (ECM) - 1988 and 1989 models
55
ECM{4}{8}

PROM, Cal-Park & ECM{5}

Faulty Electronic Control Module (ECM) or oxygen sensor
61 Air flow sensor circuit failure {9}
62 Air flow sensor circuit failure {9}
63 Vehicle Speed Sensor (VSS) circuit {9}
64 Fuel injector driver transistor {9}
65
Throttle valve switch/Wide Open Throttle (WOT) position sensor, 1989 Manifold Absolute Pressure (MAP) circuit failure
Full throttle switch always on

66 Knock sensor circuit failure {9}
71 Throttle position switch signal abnormal {9}
72 VSV for EGR system short or open {9}
73 Same as 72 transister or ground {9}

{1}—1989 I-Mark.
{2}—I-Mark, carbureted.
{3}—Pickup, carbureted. {4}—Carbureted models.
{5}—Throttle body fuel injection. {6}—Rodeo & Trooper w/3.2L engine, Stylus & 1990–92 Impulse less turbocharger.
{7}—Stylus & 1990–92 Impulse w/turbocharger. {8}—I-Mark, multi-port fuel injection.
{9}—Amigo, Pickup, Rodeo & Trooper w/2.6L engine & 1988–91 Impulse. {10}—Impulse.
{11}—Amigo, Pickup, Rodeo & Trooper.

96 & newer vehicles are OBD2 systems
and REQUIRE A SCANNER, unless otherwise stated.
Warning: Please check for manufacturer specific codes and
confirm the trouble code descriptions with an appropriate manual.
Disclaimer: We cannot guarantee the accuracy of all information.
Please confirm the information with an appropriate manual
We try and make them as accurate as we can, but sometimes we all make mistakes.

Please Note: These charts are duplicated from the American Isuzu Motors, Inc. Workshop Manual published by Helm, Inc.

For more information, please visit the Helm, Inc. website.

Isuzu Trooper 1990 / 1991

Isuzu Trooper II 1990 / 1991

Powerplant / Engine: 2.6 Liter 4-Cylinder Isuzu 4ZE1 Ignition Timing BTDC ° / rpm 12° / 900
Firing Order 1 - 3 - 4 - 2
Valve Clearance (when cold)
Intake/Exhaust 0.20 mm (0.008 inches)
Spark Plug Type BPR 5WS-11/R43XLS
Plug Size M14, P=1.25mm (0.05 inches)
Spark Gap 1.05 mm (0.04 inches)
Alternator 12 - 50 A
Starter Motor 12V - 1.2kW
Battery Manual Tran 12V - 60AH (55D23R)
Auto Tran 12V - 65AH (75D26R)

Powerplant / Engine: 2.8 Liter 6-Cylinder TBI GM 173 CID Ignition Timing BTDC ° / rpm 10° / 800
Firing Order 1 - 2 - 3 - 4 - 5 - 6
Valve Clearance (when cold) Intake / Exhaust Zero (Hydraulic adjuster)
Spark Plug Type R43TSK
Spark Gap 1.14 mm (0.045 inches)
Battery Manual Tran 12V - 60AH (55D23R)
Auto Tran 12V - 65AH (75D26R)

BRAKE (Front and Rear) Unit mm (inches)
Pad (front) Replacement thickness 1.0 (0.039)
Rotor (front) Run-out Less than 0.13 (0.0051)
Replacement thickness 20.6 (0.811)
Parallelism: circumference direction Less than 0.015 (0.0006)
Pad (rear) Replacement thickness 1.0 (0.039)
Rotor (rear) Run-out Less than 0.13 (0.0051)
Replacement thickness 10.6 (0.417)
Parallelism: circumference direction Less than 0.015 (0.0006)

REFILL CAPACITIES POWERPLANT MODEL 2.6L 4ZE1 2.8L GM V6 173 CID
Fuel Tank Capacities: liter (gal) 83 (21.9) 83 (21.9)
Engine Coolant Capacities: liter (qt) 8 (8.5 10.0 (10.6)
Engine Oil Capacities: liter (qt) With Filter Change Approx 4.9 (5.2) Approx 4.3 (4.5)
Without Filter Change Approx 4.5 (4.8) Approx 3.8 (4.0)
Manual Transmission with transfer case: liter (qt) Transmission 2.95 (3.1) 2.95 (3.1)
Transfer Case 1.45 (1.5) 1.45 (1.5)
Automatic Transmission with transfer case: liter (qt) Transmission Dry Fill 11.4 (12.0) 8.8 (9.3)
Drain and refill Approx 4.5 (4.8) N/A
Transfer Chain Case Dry Fill 1.1 (1.2) 1.45 (1.5
Drain and case Approx 0.8 (0.8) N/A
Front Axle: liter (qt) 1.5 (1.6) 1.5 (1.6)
Rear Axle: liter (qt) 1.8 (1.9) 1.8 (1.9)
Power Steering: liter (qt) Approx 1.0 (1.1) Approx 1.0 (1.1)

WHEEL ALIGNMENT Toe-in: mm (inches) 2 ± 2 (0.08)
Camber
Caster 2° 30' ± 30'
Kingpin inclination 10° ± 1°

TIRES AND WHEELS Tire Size P235/75R-15 31 x 10.50R15
Disc Wheel Size 15 x 6JJ 15 x 7JJ
Tire Pressure: kg/cm2 (psi) 2.4 (35) 2.0 (28)
Lug-Nut Torque Settings: kg-m (ft lbs) Steel Wheel: 8 - 12 (58 - 87) Aluminum Wheel: 11 - 13 (80 - 94)

RECOMMENDED FLUIDS AND LUBRICANTS USAGE FLUID / LUBRICANT
ENGINE 2.6L 4ZE1 SF, SE, or SE/CC See oil chart in Maintenance and Lubrication of this section for proper viscosity.
2.8L V6 SG or SF
Manual Transmission Engine oil (See oil chart in Maintenance and Lubrication of this section for proper viscosity)
Automatic Transmission Equipped with 4ZE1 Transmission Dexron ® -II Automatic transmission Fluid
Transfer
Equipped with V6 Transmission Dexron ® -II Automatic transmission Fluid
Transfer SAE 5W-30SF (Engine Oil)
Differential GL-5 Gear Lubricant (See oil chart in Maintenance and Lubrication of this section for proper viscosity)
Power Steering Dexron ® -II Automatic transmission Fluid
Brake System and master cylinder DOT-3 hydraulic brake fluide
Clutch System
a. Pivot Points
b. Clutch Fork Joint
c. Master Cylinder
Chassis Grease
Chassis Grease
DOT-3 hydraulic brake fluid
Hood Latch Assembly
a. Pivots and spring anchor
b. Release Pawl
Hood and door hinges
Engine oil
Chassis Grease
Engine oil
Chassis Lubrication

Parking Brake Cables

Front Wheel Bearings
Chassis Grease

Chassis Grease

Wheel Bearing Grease

Front Propeller Shaft
a. sliding yoke
b. Universal joint

Chassis grease
MoS2 contained grease or Multipurpose type grease NLGI No. 2
Rear Propeller Shaft
a. Universal Joint
MoS2 contained grease or Multipurpose type grease NLGI No. 2
Body door hinge pins and linkage, fuel door hinge, rear compartment lid hinges, heater water valve. Engine oil
Windshield washer solvent Washer fluid
Engine Coolant Mixture of water and a high quality Ethylene Glycol base type antifreeze.

how about some Rodeo stuff:D

Rodeo and the rebadged Honda Passport

Production: 1991–1997 Rodeo and 1993-1997 Passport
Wheelbase:
108.70 in.
Length:
176.5 in. (Passport)
183.90 in. (Rodeo)
184.6 in. (Rodeo LS)
Width:
66.5 in. (Rodeo/Passport)
68.5 in. (Rodeo LS)
Height:
63.6 in. (Rodeo)
64.4 in. (Rodeo LS)
65.5 in. (Passport)

Fuel Capacity: 21.9 gal

Engines:
2.6 L 4-cylinder 120hp 146-150 ftlbs 5speed manual (Rodeo/Passport)
3.1 L V6 made by General Motors (1991-1992) 120hp 165 ftlbs 5speed manual or 4speed auto (Rodeo)
3.2 L V6DI Isuzu 175hp (1993-1997) 175-190hp 188 ftlbs 5speed manual or 4speed auto (Rodeo/Passport)

Transmission:
1991–1998 Isuzu Rodeo GM 4L30-E Automatic
1994-2001 Honda Passport GM 4L30-E Auto


Axle Ratio:
4.3.1 (Passport-1995-1996 LSD)
4.3.1 (Rodeo)
4.56.1 (Rodeo 31"tires)
IFS Front/Rear 10bolt



1998–2004
Engine:
3.2L 205 hp V6 (Rodeo)
3.5L 250 hp V6 (Rodeo)
2.2L 130 hp I4 (Amigo/Rodeo Sport)
3.2L 205 hp V6 (Amigo/Rodeo Sport/Passport)

Transmission:
4-Speed Automatic Overdrive
5-Speed Manual Overdrive

Wheelbase:
106.40 in. (Rodeo/Passport)
96.90 in. (Rodeo Sport)
Length:
184.1 in. (Passport-EX)
177.50 in. (Rodeo/Passport-LX)
170.3 in. (Rodeo Sport)
Width:
70.40 in. (Rodeo/Passport)
70.40 in. (Rodeo Sport)
Height:
69.20 in. (Rodeo)
69.50 in. (Passport-LX)
68.80 in. (Passport-EX)
67.10 in. (Rodeo Sport)
Fuel capacity:
19.5 gal. (Rodeo)
17.7 gal. (Rodeo Sport)
21.1 gal. (Passport)

1999 rodeo, 5 speed manual transmission.
Rev. 3.873
1st 3.767
2nd 2.248
3rd 1.404
4th 1.000
5th 0.809

Axle Ratio:
4.3.1 (Rodeo)
4.1.1 (Passport 1998-2002)
IFS Front 10bolt Rear Dana44

Let me know thru pm what needs to be updated for accurate information.

'90 Pickup 4x4 2.6L 5 spd manual trans

Replaced my OE AISIN manual hubs with Warn. The WARN Premium hubs listed for the '87-93 Trooper II will work.

Anybody want some AISIN's?:D

http://www.warn.com/truck/hubs/premium_application_chart.shtml

Ok Hopefully someone can school me on my info needed since I have not noticed it on here. I bought a 81' Chevy Luv that has been put onto a 4wd Trooper frame and drivetrain. I am in the process of making a buggie out of the Diesel it has. (looks like the same as the chevy Luv diesel) 2.8 I believe with a 4 speed and t-case all mated. I am in need of the Tranny and Transfer gear ratio's. I really need to get those before I plan what to do as far a gearing for the buggie. I do know this thing seems pretty low geared with everything stock in it on 33's. Thanks in advance...

Ok I was wrong it is a 2.2 litre diesel from a 81 isuzu pup. Got the gear ratios? Tranny and Transfer.

sent a PM

My transmission siezed last week and I am having a hard time finding a 5 spd for my '89 2.6 L. I see this stuff all the time on Ebay from special salvage yards that shelf all the good stuff.

Just because the vehicle has snowflake wheels doesn't meen 4.77 gears. Look on the wheel and you will see a size cast into it. 15x6jj is 4.55 gears, 15x7jj 4.77 gears. These wider wheels were used on the 31x10.50-15 "wide wheel" package. I have seen these wheels cast to look identical to each other except for the width. Also keep in mind people have been known to swap to these wheels for the bigger tires.

I agree. And i do know that Independant 4x4.com has a faq page with some of these spec. I don't know anything about copywight. But that would be a good place to start.

Just because the vehicle has snowflake wheels doesn't meen 4.77 gears. Look on the wheel and you will see a size cast into it. 15x6jj is 4.55 gears, 15x7jj 4.77 gears. These wider wheels were used on the 31x10.50-15 "wide wheel" package. I have seen these wheels cast to look identical to each other except for the width. Also keep in mind people have been known to swap to these wheels for the bigger tires.

The size on the wheel is just the size of the wheel. It has absolutely nothing to do with gears. I've seen the 15x6 aluminum wheels, and the 15x7 snowflakes. I'm 99.9% sure the snowflakes only came in 15x7. The 15x6's are much uglier than the snowflakes.

If they came from the factory with the 15x7's, then yes, usually that means they got the wide-tire package, which means 4.77. but any dealer could have popped the nicer snowflake wheels onto a different trooper just for looks or to make a sale or whatever, so you can't ever be 100% sure until you see the option code.

there exists two snowflakes:

15x7's and 16x7 1/2's
FACT



also if you are looking for 4.77's you have to find a rear drum brake first gen amigo or the even more rare 2 door RS trooper. Look up option codes on the firewall.
good luck

Look up option codes on the firewall.
good luck

Isuzu newbie here...

where is this code? how can i use it to determine axle ratio? did the dana44 rear ever come with 4.56's?

thanks

could we add to this fact thread peoples different set ups doing sas, ie parts that worked well and ones that dont

Just want to point out my 87 has I think the same width axle as the 88+ (at least closer than that of the 86) I swapped my axle out from one at the junkyard from an 86 and now I have a narrower rearend than frontend. Pretty sure old one was 58" drum breaks. The 87's are odd on several points and I think months of the make are a big deal too so remember this when you head to the junkyard. (some of this can be dealt with by checking a parts store web site or calling and seeing if it asks you to specify month made). This can save a lot of head scratching wondering why a part you just pulled from an 87 doesn't fit :p

could we add to this fact thread peoples different set ups doing sas, ie parts that worked well and ones that dont

figured i'd just state the specs on my front axle

1977 Jeep J-10/20 dana 44 front end:

-6 lug
-flat top knuckles for highsteer
-top-mounted tierod, if you spring over keeps it high and tight to the springs
-wider track width (approx. 63" WMS) rear isuzu corp 12 bolt matches up nice to this width with wheel spacers. my 89 axle required 1.5" ones but a newer corp 12 bolt would be 61" WMS i believe? a little closer
-warn premium 9/10 turn hubs from the factory
-good sized brakes that still will clear 15" rims
-stock J10 spring-under springs will settle to flat when configured in spring-over setup and allow lots of droop

'98 + amigo use the 1310 UJ flg, this part is a Power Train Industries part# 3102-33. For those who swap axles it can be difficult to transition if a CV shaft is needed, as far as I have found everyone has made one-off adapters.
Power Train Industries has a 1310 CV conversion flg #3102-251CV for Land Rover which uses the same pilot hole as the stock Isuzu 1310 UJ flg, you still have to rotate and re-drill the t-case output flg bolt holes because the bolt pattern is not the same. Not perfect but cleaner and cheaper than adapters. I believe the pre-'98 drive shafts use the same pilot size but different bolt pattern, please correct me if I'm wrong.

Just want to point out my 87 has I think the same width axle as the 88+ (at least closer than that of the 86) I swapped my axle out from one at the junkyard from an 86 and now I have a narrower rearend than frontend. Pretty sure old one was 58" drum breaks. The 87's are odd on several points and I think months of the make are a big deal too so remember this when you head to the junkyard. (some of this can be dealt with by checking a parts store web site or calling and seeing if it asks you to specify month made). This can save a lot of head scratching wondering why a part you just pulled from an 87 doesn't fit :p

The '87 was a weird duck for sure!
Mine had the early t-case, 10 bolt rear which was wide, 8 bolt front, but had the late model a-arms. And '87 only half shafts that has the 8bolt cvs, but the later outer ends. I think there was about 3 different versions in '87, good luck if you have one.