What are the different, (years, etc.) 4 speed automatic transmissions ( type: 4T6x-E) that can used with the Series II 3800 Supercharged L67 motor, for the Fiero swap?
Thanks for the help.

I think it's 98-02 that you want. There were different models (heavy duty and standard duty) and there were a couple different ratios too, but I don't know the details on which car had what ratio. If it comes from a s/c car (and is the original trans) it will be an HD model.

Edit: the trans model is a 4T65E-HD. I believe the build code for HD was MN7.

[This message has been edited by 1fatcat (edited 05-07-2011).]

http://www.gmtuners.com/gmtransinfo.htm

Pretty much any one will do. You could throw a rock in Pick-n-Pull and hit one that would work.

I would not use anything but the heavy duty 4T65eHD trans that was used with the 3800SC. To avoid possible PCM comptibility issues I would stay with 2002 and earlier units for the series II.

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" THE BLACK PARALYZER" -87GT 3800SC Series III engine, 3.4" Pulley, N* TB, LS1 MAF, Flotech Exhaust Autolite 104's Custom CAI 4T65eHD w. custom axles, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "

The most common (in these parts) would be from a Bonneville SSEi or a Grand Prix GTP. There were others too, like buick riviera, olds lss, buick ultra (I think?).

I can guarantee that a 98-02 bonneville ssei or grand grix gtp have the trans you'r after...as long as it's the original or correct replacement.

The 4T60-E (HD) was used in 1996 with the L67.
From 1997 thru the end of the production of the 3800 SC (Series 2 L67 and Series 3 L32), the 4T65-E HD was used. (The LS4 V8 also got an HD version of the 4T65-E).

There were also non-HD versions of the 4T60-E and 4T65-E which every other engine got that used these transmissions. The major difference was the differential and the CV drive axles. HD versions were bigger/stronger.

If you want to run a 4T60-E HD (vary rare since it was only built in 1996) or a non-HD 4T60-E with an L67, then you'll need to use a 1996 PCM.

If you are running a 4T65-E or 4T65-E HD that was made from 1997-2002, you can use any 1997-2002 PCM/programming. But 1998-2000 PCMs/programming is best to use in swaps.

If you are running a 4T65-E or 4T65-E HD that was made in 2003 or later, you must use a 2003-later PCM/programming. In 2003 GM deleted some electrical switches from inside these transmissions that the earlier PCMs will not work without. I recommend using the 2003 PCM (2003 Grand Prix GTP programming) since VATS can be disabled in it, and the Fiero A/C controls are compatible with it.

As of right now, VATS cannot be disabled in ANY 3800 Series 3 PCMs; and these systems also required the use of drive-by-wire throttle bodies which can be troublesome too. A 3800 Series 3 engine can be used with a earlier Series 2 PCM if you get an adapter plate that will allow you to use the older style, cable-operated throttle body.

-ryan
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OVERKILL IS UNDERRATED

Custom GM OBD1 & OBD2 Tuning | Engine Conversions & more | www.gmtuners.com

[This message has been edited by Darth Fiero (edited 05-09-2011).]