Are the t series transmissions compatible input/output wise with the l series transmissions? If an engine computer came out of a vehicle that came with a 4l60e, would a standalone unit be necessary, or would it think either the 4t60e or 4t65e(hd) as a 4l60e?

quote Originally posted by kwagner: Are the t series transmissions compatible input/output wise with the l series transmissions? If an engine computer came out of a vehicle that came with a 4l60e, would a standalone unit be necessary, or would it think either the 4t60e or 4t65e(hd) as a 4l60e?

OBDI computers cannot work on a 65e transmission.

OBDII can run either a 60e transmission, or a 65e

PCS makes a standalone unit to shift and tune the 65e.

Loyde

I've wondered the same thing.
Are the 4L60E and 4T60E control inputs and outputs the same, or at least similar?
IOW, can a 4L60E ECM control a 4T60E without any big issues?

(I have frequently heard what Loyde said about the 4T65E. It's way different.)

The computer is out of a '95 engine that normally controls a 4L60E.
I have seen PCS's unit, and if I can use the existing engine computer for both engine and transmission instead of a standalone unit, I'll do it and save the $850 the PCS computer and wiring harness would cost me. My other option is to use MegaShift, a modification of MegaSquirt that is designed to run a 4L60E (also programmable shift points, etc, but for much less than PCS). Before I can determine that, I need to know if the 4L60E and 4T60E are compatible operationally or not.

I have all that info at home.
If nobody post an answer, I will look it up tonight.

Gene

quote Originally posted by Raydar: Are the 4L60E and 4T60E control inputs and outputs the same, or at least similar? IOW, can a 4L60E ECM control a 4T60E without any big issues? (I have frequently heard what Loyde said about the 4T65E. It's way different.)

The answer is yes. The L60 and T60 share the same solenoid accuation. The 65e and 65eHD are the same. The 60e and 65e are completely different.

The PCS does not control ENGINE parameters.

The PCM for OBDII for the most part can run just an engine as long as it was not a ETC controlled engine. VSS is important for IAC to function 100% correct, but it is not completely nesscessary.

The transmission can be controlled by OBDII PCM, but it must know VSS and RPM to work correctly.

This information is based on 3800 OBDII PCM for the most part. I have researched LS1 V8 PCMs and transmissions a little to get the OBDII engine management and transmission management correct for the LS1/4T65eHD install to be correct.

Loyde

Thanks loyde.
I knew the PCS only controlled the tranny, I wanted to avoid having multiple computers in the swap if possible.
I may end up going getrag anyway, but it's good to know I may have a fallback.

[This message has been edited by kwagner (edited 09-27-2005).]