What Transmission Do I Have???

Hey everyone. I need to figure out what transmission I have. I have no idea where to start, and I cant seem to locate a plate with any numbers on it. I have a 1966 jeep cj5, but the motor is a 1980's 2.5L 151 4 cyl.
I am hoping my poorly lit pictures are enough you guys can tell me what I got.
View attachment 69033 View attachment 69032 View attachment 69031 View attachment 69030 View attachment 69030

 

Looks like a T90-j from here.
It would have had a T90-c but the gears are different tooth count and the input shaft is different between them.
Seems they pulled everything forward to make it work.
Any tags and stamps are null and void at this point.

 

This may help in ID--

1.) A top loaded, top shifting transmission using a cane shift lever. Correct?

2.) 3 speed. Correct?

3.) Mated/married up to a twin-stick transfer case. Correct? Do you know the transfer case model?

4.) What make of motor is the 4-cylinder---the General Motor/Pontiac Iron Duke?

As suggested --perhaps>>>The Novak Guide to the Borg-Warner T90 Transmission

 

Wow, lets see if I can help answer more of your questions.
It is a 3 speed.
Yes, the transfer case is twin stick.
The motor is stamped GM 10009542-1 on the block.
From what I understand, this is the "Iron duke."
I dont know a top loaded, from any other kind. So I will have to look at that more.
I will look at the t90, as you suggested, and see how that goes.
Thank you guys! I will let you know what i find.

 

I'll second the T90-j as used in the Willys Wagons/Pickups, or at least a T90 with the long 18 tooth main drive gear. That looks to be an aftermarket adapter/spacer between the Chevy bellhousing and the transmission. Look for "AA" or advance adapters cast in it.
You will likely find "T90a-1" cast on the upper drivers side of the main transmission case. That is a Dana 18 Transfer case. All above was a very common "conversion" from the late '60s-up when swapping engines in Jeeps.
-Donny

 

Front bolt pattern is small, like a T-90.

According to this Jeep Transmissions: T-90 there should be a "T-90" cast in to the side of the transmission case. Realize that your pictures show mostly transfer case, mounted behind the transmission, not transmission. Get under there with a bright light and mirror and see if you can read some casting marks in the transmission. Or take the floor plates off and look from above.

 

That is a standard Chevy bellhousing, so likely is the 80-83 GM 2.5L engine from a Jeep.

 

You guys nailed it. I got up under there with an inspection mirror, a mumbled cussword, and a flashlight.
It looks like is says T90A-1 (or J) i cant tell.

Also, the transfer case has a plate on top, that is just about unreadable. But i swear in the bottom right portion it says Series 18.
Maybe that is my imagination, but does that sound right?

 

it says T90A-1, i believe the J was never stamped on there. it has to be an 18, due to the offset rear and T90.

 

The only transfer cases I know with a tag on top are early Brown & Lipe (pre-Dana) models from the mid/late 1940s. Measure the end of the intermediate shaft, located on the back side between the parking brake drum and the 5 bolt rear cover plate. It has a D shape end for a locking tab. It could be 3/4", 1 1/8", or 1 1/4". This will give and approximate estimate of the vintage of the transfer case. Either way, that is a Dana 18 (D18) transfer case.
-Donny

 

I was incorrect. The metal tag is in the top forward right side of the trasmission, as viewd looking down from the drivers seat.