1990 tranny question

[Karma]

Ive been reading about swapping a 1991+ tranny into a 1990, and I CANNOT wrap my brain around it. Im looking at buying a Galant vr4 awd 5 speed tranny. I have a 1990 awd 5 speed in my car now. Some people say swap input shafts, while others say swap output shafts. WHICH ONE! I bascily want to know if it will work with my stock transfer case. Different gear ratio's doesnt concern me, nor does the work involved. Someone just tell me what I have to swap to make this car roll!

Thanks

 

[Rex2342]

You'll have to count the splines on the output shaft of the new transmission. 90 transmissions use a 22 spline output shaft and transfer case while most 91+ use a 23 spline. I say most because half way through 91 they switched to the 23 so earlier 91's will have 22 spline units. When I did mine I just got the T-case and transmission together (both 23 spline) and put it in. The only other thing I had to do was get a shifter base from a 91 and up. I used my 90 shifter cables and the shifter brackets that came on the 23 spline transmission.

 

[Karma]

Thanks for the info. Only problem is the transfer case that came on the tranny was sold seperatly.
Anyone know the right answer to swapping input shafts?

 

[Rex2342]

Thanks for the info. Only problem is the transfer case that came on the tranny was sold seperatly.
Anyone know the right answer to swapping input shafts?

It's a real PITA and involves taking the transmission case apart (if I'm remembering right). I tried it with mine before I got the 23 spline t-case. It would probably be easier to just get the 23 spline t-case. I got mine on ebay for about $70 shipped. I've got 2 of them here if your interested PM me.

 

[Karma]

Found out the tranny is a 22 spline, so im good to go for that.
Anyone else with info for input shaft swapping?

 

[Rex2342]

If the tranny is a 22 spline you can just use your stock T-case. Everything will bolt up fine.

 

[Karma]

Haha, wow. Im an idiot. Thanks for the help