Got a Geo Tracker buggy that has a 1.6 16v engine, stock tranny and transfer case connected to a zuki transfer case with 4.16 gears...it's got gm disc brakes all around and 1 ton differentials.....

When I go to climb even the slightest of grades in D,L or 2 and both cases in 2wd or 4wd the truck revs but won't move, if the grade is loose gravel I get the same results. If I shift either into low range, the vehicle moves....

I figured the tranny needed rebuilt...loose clutch or lo pump pressure...so I got it rebuilt and still does the same...

Next I checked the rear brakes, didn't have much pressure,residual wise as my gauge didn't go so low but when I cracked the bleed screw, so fluid popped out. I also experienced a little bit of excessive drag, so I rebuilt the master cyclinder as I couldn't see the return seat inside the master cyclinder equalization port. They don't drag now...

On jack stands all works fine....and level ground it works well...

It still does the same...could something inside either transfer case cause this? Both cases shift nicely...the zuki case is similar as I understand it to a Toyota and nothing comes to mind that might cause this issue so I ask the Pirate Board for any assistance....

so the rig revs but nothing moves? ie your tires are not spinning etc.. then you put the Tcase in Low range it begins moving? .... so when the gearing is lower it moves.. how tall are your tires? what gears are in your diffs?

The gears need to be 5:71 or lower w/33" tires. The axles are too heavy, IMO.

If your runnin one ton diffs than I am gong to assume you have bug ole tires? your tiny little trannie doesn't have the stones my friend, you are just fryin the clutches in your torque converter and heatin up fluid in anything but low range. what gears are you running in your axles? what size tires? many questions unanswered grasshopper

37's and 4.56's...what get's me is that it moves on flat ground just fine...going to talk today to the orignal builder.....

I have 35" tires on my tracker. I have 4.88 and the undertaker which gives me 7.32:1. You my friend are lacking gearing. My transmission can handle the 35" tires pretty darn good. When on the freeway, going up an incline, I notice it doesn't have the power to keep speed. When I had the 5.71 gears and the 35's it was really a dog.

what tranny is it? id assume it is an auto since you are refering to the pump pressure. what does it do in a bind like up against a rock or something? was the torque converter replaced when the tranny was rebuilt?

sounds like a torque converter problem.

Convertor was replaced during rebuild, reputable tranny guy questioned me why I wanted it overhauled when it was torn down...said he saw very little if any wear and it was most likely not the cause of my issues...

On the rocks...not quite there yet...if it won't climb out of the wash in standard gears...I don't want to get stuck on the trail...

Well....guess I'll look over the rig some more...it should work just fine since it was built back in 2002 as an ARCA rig.....

Is it going into gear all the way? Check the linkage and make sure everything is working as it should. Mine sometimes acts goofy when I am in between gears.

Travis

it works fine on jack stands and feels good and firm in gear...

well I pulled out the steath-a-scope and found one injector had died...all better now.....

Ouch.

My XL will be running 7.17's with 37's. It will put me back to stock :D

I wanted to stay with yota axles but 5.71 is the limit, & D44's only go up to 5.89 IIRC

Considering trackers/grands/xl's came STOCK with 4.62 or 5.13 , I would seriously consider re-gearing.

Just a thought about being such a dog.

We had trackers 1.6 8V (header & cam) 5 spd 37's with 5.29's it was BRUTAL on the street. :laughing:

Of course when we put it into 2 LO (with our kicker 2's ) it was fine, cant run 2 Lo on the street or else the Tracker t-case will grenade. LOL



37's and 4.56's...what get's me is that it moves on flat ground just fine...going to talk today to the orignal builder.....

got no issues with being able to crawl...4.16 with a 2x tracker case and auto at 2.4 and 4.56, yield ...91:1 low range with all gears....35:1 and 17:1 standard....

All gears in mine is 113:1, crawl. My standard first gear w/t-case in high is 30:1. That is my street driving ratio. So if you are 35:1 for street driving you should be fine, other wise something is haywire.
How are you coming up with your high gear ratio. Is that with one t-case in low and the other in high?

Of course you will be fine to crawl, but why on earth would you run 4.56's when the truck came stock w/4.62's (automatic)


Try using a gear calculator.

Old tire diam. Tracker 26"
New tire diam. 37"
Original gear ratio 4.62 (automatic)

Required gear ratio (bring back to stock) = 6.57 :smokin:


http://izook.com/gearcalc.htm

P,S, I know I'm a bit off topic, but what curious on why the 456 gear choice. :)

that's the gears that come with a 1 ton truck stock...of course I'm running a 4.16 transfer case so I have a 1.6 final drive instead of 1:1...I don't drive this on the street...just cawl and get to the trail...but I do have nitrous when the motor runs out of grunt...and this is Pirate, you can never be off subject....it sorta goes with the territory:D

I figured as much......:p

When I go to climb even the slightest of grades in D,L or 2 and both cases in 2wd or 4wd the truck revs but won't move, if the grade is loose gravel I get the same results. If I shift either into low range, the vehicle moves....





well I pulled out the steath-a-scope and found one injector had died...all better now.....



So this was the anwser to the "won't move" problem????

ah yep....I know...I still don't understand it completely but if your 25% down on power...I guess weird things happen....works great now...

yeah that just doesn't make a lot of sense to me. If your torque converter spools up (your engine revs just fine) then it should grab. If I hold my brakes hard enough while holding the accelerator just above high idle, the clutches engage and the tires try to overcome my braking force. The engine boggs and dies if I can't get enough juice to overcome the brakes. It doesn't just keep reving up under load. Certainly wouldn't have guessed it was an injector.

power isn't just down the 25% due to that cylinder ...

it is robbing power just to spin the dead cylinder and a loss of timing for the the motor as a whole ...

no way to prove but i'd bet overall power was down 50% ...

1 cylinder down in a 250hp V8 won't be too bad ...

1 cylinder down in an 80 hp (in new and effcient condition) 4 cylinder will be huge

good point...but come on...it makes at least 82 hp, I've got headers....new ones at that...if I still had the manifold, I would've been still looking...when she don't turn blue...she ain't making no power....