1G Manual to Auto Conversion

sleeper1ga · Apr 16, 2015

So I will be swapping my 90 gsx manual to auto, but I want to make sure that when I'm acquiring parts that I'm picking up the right ones. I know 90 manual transmissions are different then other years, so I'm wondering if/what I would need specifically if I were to put in a different year auto trans. I understand that there is different spline counts on the transfer case on different years, and I would like to do a later 1g trans and 4 bolt LSD, but I am wondering what I would need in order to do this swap. Do all automatic transmission mount the same in 1g's(I know mount is different from manual)?
Thanks in advance,
Sleeper1ga

Rev_olution · Apr 16, 2015

My suggestion, I'm in the process now, is just to find a rolling car or entire setup and transfer over.

built 97 · Apr 17, 2015

Rev_olution said:
My suggestion, I'm in the process now, is just to find a rolling car or entire setup and transfer over.

I agree. Parts can be hard to find for these cars.

talonracer12 · Apr 17, 2015

I hate to direct you to another site but try atdsm.com They have a couple of people that have did the swap already and have a list of things. This is what I used to find the parts I needed for my auto swap. I would start there and see how far it gets you.

Xtremboost87 · Apr 17, 2015

I have an auto 1g Talon TSI, and I want to swap it to manual! LOL

hotrodssnova · Apr 17, 2015

You 2 should set up a swap deal.

Lester B · Jun 25, 2015

Shit I'll set up a trade. I'm seriously thinking, probably will, make the manual to auto conversion. 3rd gear grinds anyways. Haha

I'll check out that atdsm.com. Thanks guys.
Cheers

90_AWD_Thunder · Jun 25, 2015

90 and 91 dsms share the three bolt rear diff 92 and up are all 4 bolts as for the swap you will need all three components trans, t case, and rear diff. I would search for a 92-94 donor car and go from there you will also need the tcu and harness as well. 92-94 dsms will also have 23 spline t case as well which is the stronger of the 2. And yes all auto trans for 1g's share the same bolt patterns.

Lester B · Jun 25, 2015

90_AWD_Thunder said:
90 and 91 dsms share the three bolt rear diff 92 and up are all 4 bolts as for the swap you will need all three components trans, t case, and rear diff. I would search for a 92-94 donor car and go from there you will also need the tcu and harness as well. 92-94 dsms will also have 23 spline t case as well which is the stronger of the 2. And yes all auto trans for 1g's share the same bolt patterns.

Thank you Thunder! I will store that info fo sho!

breaksdaily · Jun 28, 2015

dont forget the special ring that slides into the end of the crankshaft were the flexplate bolts!

Lester B · Jun 30, 2015

End of the crank!? Where tc slides onto?
What's it called? Is it specific to a manual to auto swap?
Thanks for the info breaks daily

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1G Manual to Auto Conversion

sleeper1ga

Rev_olution

built 97

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Xtremboost87

hotrodssnova

Lester B

90_AWD_Thunder

Lester B

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Lester B

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