Pirate 4x4 banner

1 - 5 of 5 Posts

·
Premium Member
Joined
·
3,395 Posts
Discussion Starter #1 (Edited)
good info here: https://www.4x4review.com/the-top-10-off-road-transmissions-of-all-time/

Common Transfer Cases - Guide - High and Low Ranges - Off-Road Magazine

http://hermtheoverdriveguy.com/?page_id=900

http://www.novak-adapt.com/catalog/transmission/transmission_packages/transmission_packages.htm

http://cj3b.info/Tech/T90Variations.html

T90 info:

T-90A1
'The T-90 used from 1946 to 1962 with the L and F-head four-cylinder engines is designated as the T90A1. These versions all feature top shifters, a seven inch input shaft (stick-out length) with 15/16ths inch, 10 splines and a felt-sealed front bearing retainer assembly. The input shaft has an 18-tooth, helically cut input gear. The cluster gear has a 33-tooth driven gear, resulting in a 2.98:1 first gear and a 1.66:1 second gear.

T-90C
'The T-90 used from used from 1963 to 1971 with the F-head four-cylinder engine is designated as the T-90C. It features top shifters, a seven inch input shaft (stick-out length) with 15/16ths inch, 10 splines and a felt-sealed front bearing retainer assembly. Since the T-90C uses a case marked 'T90A,Õ you will need assurance that the transmission in question came from a post '62 Jeep, or you will need to pull the top cover and count teeth. The T-90C has a 16-tooth, helically cut input gear. The cluster gear has a 35-tooth driven gear, resulting in a 3.44:1 first gear and a 1.85:1 second gear.

T90J
'The T-90J was used with the six-cylinder trucks from 1952 to 1965. These were either column or floor shift models. They had an ~9-1/4 inch input shaft (stick-out length) with a 10 x 1-1/8" splines and a neoprene-sealed front bearing retainer assembly. The T-90J has an 18-tooth, helically cut input gear. The cluster gear has a 33-tooth driven gear, resulting in a 2.79:1 first gear and a 1.66:1 second gear.'"



NV4500 GM 93-94 95/up GM; 93/up Dodge
First Gear 6.34 5.61
Second Gear 3.44 3.04
Third Gear 1.71 1.67
Fourth Gear 1.00 1.00
Fifth Gear 0.73 0.73
Reverse 6.34 5.04

Factory GM tailhousing with 32 spline output shaft

Factory Dodge tailhousing with 23 spline output shaft

Factory Dodge tailhousing with 29 spline output shaft

Manual Transmissions 1st 2nd 3rd 4th 5th
SM 420 7.02 3.57 1.70 1.00
NP 435 6.69 3.34 1.79 1.00
SM465 6.55 3.58 1.57 1.00 other info says 3rd gear has 1.70 gear ratio
T-18 6.32 3.09 1.69 1.00
ZF5-42 5.72 2.94 1.61 1.00 0.76
NV4500 (Dodge) 5.61 3.04 1.67 1.00 0.73
NV 3550 4.01 2.32 1.40 1.00 0.78
Bronco 3 spd (6 cyl) 3.41 1.86 1.00
Bronco 3 spd (8 cyl) 2.99 1.75 1.00






Automatic Transmissions 1st 2nd 3rd 4th 5th
700R4 3.06 1.62 1.00 .70
AOD w/ low gear set 2.84 1.55 1.00 .67
AODE/4R70W* 2.84 1.55 1.00 .67
turbo 350 2.52 1.52 1.00
turbo 400 2.48 1.48 1.00
Bronco C4 2.46 1.46 1.00
C6 2.46 1.46 1.00
727 2.45 1.45 1.00
AOD 2.40 1.47 1.00 .67

T-CASES
dana 18 1.97/2.46
dana 20 2.03/2.34/2.46
dana 300 2.62/4.0
NP203 1.96
NP205 1.96
NP208 2.69
NP231 2.72
NP241 2.72
NP241OR 4.0
NP261/263 2.76
NP271 2.72
NP273 2.72
BW1339 2.57
BW1350 2.48
BW1356 2.72
SUZUKI 2.268
TOYOTA RF1A 2.28
TOYOTA VF1A/VF2A 2.57
TOYOTA VF2AM/VF2BM 2.57
NISSAN TX10A 2.02
LAND CRUISER 2.31:1 (pre '74), 1.99:1 (1974), 1.96:1
('75-'80), 2.28:1 ('80 -'83/'84), 1.96:1 ('83 and up)

ATLAS 4SPD RATIOS:
Low Range: (2.0:1, 2.72:1, & 5.44:1) or (2.72:1, 3.0:1, & 8:16:1) or (2.72:1, 3.8:1, & 10.34:1) or (2.72:1, 4.3:1, & 11.70:1)

ATLAS ll 2.0:1, 3.0:1, 3.8:1, 4.3:1, 5.0:1, or 6.0:1

Orion 3:1 or 4:1

STAK mini-monster 2-Speed Low: 3.78:1, 4.29:1 or 5.22:1
3-Speed Low: 2.10:1 & 3.75:1 or 2.43:1 & 4.33:1 or 3.05:1 & 5.44:1
STAK monster 2.05:1 & 3.75:1 or 2.43:1 & 4.33:1 or 3.05:1 & 5.44:1
(STAK was bought out by TWF and the product & gears may have changed)

this is just the start of this chart that I thought would be good for referencing for your build. please feel free to add new info.....chris
 

·
Registered
Joined
·
11,081 Posts
My research says that the SM465 didn't normally, or at all, have the 1.57:1 3rd gear. Novak and a lot of other places print that, but when people start counting gear teeth something like 1.7:1 is much more common....
 

·
Registered
Joined
·
11,081 Posts

·
Premium Member
Joined
·
3,395 Posts
Discussion Starter #5 (Edited)
yea just did some quick searching and found the same as you're saying--I amended the chart above--

what i'd like to do is also include inputs/outputs--bellhousing, t-cases etc that can be fitted to each tranny, but i don't have time to do that ---would be a great sticky!!!
 
1 - 5 of 5 Posts
Top