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T90 behind an F134 from a cj5
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bigdaddy13 View Drop Down
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Points: 213 		Post Options Post Options   Thanks (0) Thanks(0)   Quote bigdaddy13 Quote  Post ReplyReply Direct Link To This Post Topic: T90 behind an F134 from a cj5
    Posted: 15 Nov. 2017 at 5:32pm
how can i identify if the transmission is a t90C and not an A1?

Or is that simply a given since it was behind an f134? 
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smfulle View Drop Down
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Points: 6141 		Post Options Post Options   Thanks (0) Thanks(0)   Quote smfulle Quote  Post ReplyReply Direct Link To This Post Posted: 15 Nov. 2017 at 6:26pm
On a rig that is over 50 years old, I would not assume anything is still the way it came from the factory.

A quote from Novak's Guide to the T90

"The T90 used from 1963 to 1971 with the F-head four-cylinder engine is designated as the T90C. It features top shifters, a 7" input shaft (stick-out length) with 15/16" x 10 splines and a felt-sealed front bearing retainer assembly. Since the T90C uses a case marked "T90A", 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 T90C has a 16 tooth, helically cut input gear. The cluster gear has a 35 tooth driven gear, resulting in a 3.34:1 first gear and a 1.85:1 second gear."

Here's a link to the Novak's page:
Stan
48 CJ2A (Grampa's Jeep)
59 Chevy 1/2 ton
Grampa's Jeep Build Thread
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jeeper50 View Drop Down
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Points: 2579 		Post Options Post Options   Thanks (0) Thanks(0)   Quote jeeper50 Quote  Post ReplyReply Direct Link To This Post Posted: 15 Nov. 2017 at 6:31pm
Pull the cover and count the teeth

Belleview ol skool winch soon.
'48 CJ2A 283 V8 sm 420 granny low, tera low D18, overdrive,lockers

Texan at heart,Alabama by retirement
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oldtime View Drop Down
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Points: 4184 		Post Options Post Options   Thanks (0) Thanks(0)   Quote oldtime Quote  Post ReplyReply Direct Link To This Post Posted: 16 Nov. 2017 at 12:17am
The T90 A has 18 tooth maindrive gear (input).
The T90 C has 16 tooth3 maindrive gear.

The low geared T90 actually dates back to 1947 for use in Willys PU trucks.
Howeveri It was not used in the CJ's prior to November 1962 (1963 model year) when it became the standard.
Currently building my final F-134 powered 3B .
T98-A Rock Crawler using exclusive factory parts and Approved Special Equipment from the Willys Motors era (1953-1963)
Zero aftermarket parts

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bigdaddy13 View Drop Down
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Points: 213 		Post Options Post Options   Thanks (0) Thanks(0)   Quote bigdaddy13 Quote  Post ReplyReply Direct Link To This Post Posted: 19 Nov. 2017 at 2:34am
Originally posted by jeeper50 jeeper50 wrote:

Pull the cover and count the teeth

[kicks dirt] 18 teeth Dead
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