GM automatic

[ohiorob]

when GM jumped on the band wagon in sport compact racing thay ran with a automatic that seamed to hold up well. anyone know anything about them, all I know is that it's a 4 speed and came in some cadillacs. If this turns out to be a great starting point for a tranny I may try to adapt it to my car.

[dodgeshadowchik]

Here's a link that lists the GM FWD Transmissions:
http://www.gmtuners.com/gmtransinfo.htm

If I were to guess the ones you'd be interested in would be the 4T60 or 4T80-E's. Kinda like the Chrysler designations; the 4 = # of gears, the T = Transversely mounted and the "40" "60" or "80" is the strength rating i.e. torque rating. The larger the number, the stronger the transmission.

[ohiorob]

Here's a link that lists the GM FWD Transmissions:
http://www.gmtuners.com/gmtransinfo.htm

If I were to guess the ones you'd be interested in would be the 4T60 or 4T80-E's. Kinda like the Chrysler designations; the 4 = # of gears, the T = Transversely mounted and the "40" "60" or "80" is the strength rating i.e. torque rating. The larger the number, the stronger the transmission.

thanks MB for the info. that's a great place to start.

[turbovanman²]

4T65's and 4T80's are pretty big units, they ran those on the midsize and bigger cars. Electronics would be easy, tons of plug and play controllers these days. You might be on too something, they are pretty strong. 4T40's and 4T60's are probably what you'd need. Interested to see what you dig up Rob,

[black86glhs]

Being sport compact, i'de say it is a 4t45-e.

[turbovanman²]

Being sport compact, i'de say it is a 4t45-e.

Yeah, that too, lol.

[contraption22]

Check this out.

http://cowan1984.xtreemhost.com/gmtu...build_book.pdf

[dodgeshadowchik]

^^

Nice find!

[turbovanman²]

Check this out.

http://cowan1984.xtreemhost.com/gmtu...build_book.pdf

Agreed, nice find.

I love GM sometimes, non of this auto learning bs that Dodge has with the A604,

An easy and cheap way to shift the 4T65E is with two toggle
switches. The toggle switches need to switch ground to pins
A and B in the pass through connectors. To operate the
transmission turn both switches on. This will put the
transmission in 1st gear. To shift into 2nd gear shut off the
switch to solenoid A off. To shift into 3rd gear shut off the
switch to solenoid B. For 4th gear turn the switch for
solenoid A back on.
SHIFT CONTROLLERS

[black86glhs]

I stand corrected. That is the trans they most likely use. Man that is a stout unit...HEHE.

[ohiorob]

thanks everyone that is exactly what I was looking for. now I got to find a junk tranny and see if this is at all possible. if it's a go I'll be building this over the summer. don't look like a cheep build but it's better than building another gernade.

[turbovanman²]

thanks everyone that is exactly what I was looking for. now I got to find a junk tranny and see if this is at all possible. if it's a go I'll be building this over the summer. don't look like a cheep build but it's better than building another gernade.

Did you blow up your 3 speed?

[ohiorob]

Did you blow up your 3 speed?

no and not planning on it but to keep up with the honda guys I need to run 9.70 or quicker. I don't think the tranny will last at that power level. just look at Brian Slow and Darrell Cox and the time and money they have in there trannys. the a413 is a awesome tranny for how tiny and simple it is but after 600 hp it's a crap shot no matter what you do to it.

[wheming]

The bolt pattern on that 4t45e doesn't happen to be the same as the v8? I guess i wouldn't think so.
I was interested in something similar but for RWD.

[black86glhs]

The bolt pattern on that 4t45e doesn't happen to be the same as the v8? I guess i wouldn't think so.
I was interested in something similar but for RWD.

I don't think it will and besides, anything GM that has a T after the first number is a FWD trans.

[Mopar318]

According to the Chrysler student handbook. The T stands for Traceability, whatever that is supposed to mean.

[Vigo]

Why not spend the money on an aftermarket controller and run a mildly upgraded 604? I believe two neons have already put 600+hp (although probably no more torque than you) through them.

They came with 2.4 bellhousings and you dont have to spend $$$$ on custom axles.

[Ondonti]

Not sure how often those boys were going through their transmissions. Bomb is something you don't inspect regularly.

[RoadWarrior222]

I wanna say that you should look at the GM Metric bolt pattern trannies from behind FWD V8s, the starter looks almost in the right place, (Northstars had it up top though) and in particular the "F7" version of the 440T4 (That became the 4T60) which was supposed to be specially strengthened, and came in the '87 to '93 Cadillac Allante... that's just my gut feeling best guess though.

[black86glhs]

4T65 will bolt up to most FWD GM engines except the Ecotec 4 cyl engines, the Nothstars, or the Quad Four engines. With an adapter, they could easily be installed behind an Ecotec engine.