gilly327

you guys running a 4l60e tansmisson with a 427 pcm what year transmission are you using.i know some years are pwm controlled tcc. some have carbon tc's. 2 piece bell housing etc..looking to upgrade from my 700r4 and want to make sure I get the right one.thanks

anesthes

iTrader: (12)

The late modular transmissions are better in a lot of ways. larger tail shaft and supports, larger input shaft, heavy duty torque converter.

1993-1994 are NOT PWM.

95+ are PWM

The PWM transmissions will have PWM stamped on the stator/pump.

A PWM trans can be converted to non PWM. Youtube videos are available. (PWM delete)


I recently started becoming a fanboy of the e-trans stuff.

Here is a great video:


-- Joe

gilly327

my ecm is from a 95 suburban. most of the 4l60e vehicles at the local yard are 97-up.i was curious because I read this excerpt:
.1993- first year for the 4l60-E. In its simplest terms, it is an electrically controlled 700r4. No PWM. 11 pin connector

1994- NOTHING changed between 93 and 94. Transmissions are directly interchangeable. No PWM. 11 pin connector

1995- Stand alone year. First year for PWM. Has an extra solinoid to control the PWM. 3-2 shift AND TCC are PWM in this trans. Has a different 3-2 control solonoid, and a extra wire in the harness to facilitate the PWM TCC lockup. Addition of a trans mounted neutral safety switch. If you put a 95 trans in a 94, it will not recognise the PWM circuits and will go in to limp mode. If you put a 94 trans in a 95, the check engine light will stay on, and the TCC and the 3-2 clutch pack will burn up after just a few miles. If you put a 96 trans in a 95, the 3-2 clutch pack will also burn up after a few miles. 95 has a 10-15 ohm TCC solenoid and a 10-15 ohm 3-2 solenoid. 12 pin connector.

1996- 3-2 shift is NON-PWM. It was changed back to a on/off arrangement. The 3-2 solenoid was changed to a 20-31 ohm unit. The 3-2 control valve was changed to "design 2". TCC is still PWM and uses the same 10-15 ohm solenoid as a 95. You can create a 95 trans out of a 96 or vice versa, but you have to change the 3-2 solenoid, the valve body, and the separator plate. If only the 3-2 solenoid is changed (and not the valve body casting), the transmission will 'cut loose' on 3-2 downshifts (shift from 3rd to neutral, then to 2nd as the accelerator is released). 12 pin connector.

1997 (one piece bell housing)- Identical to 1996. Direct swap. 12 pin connector.
1997 (two piece bell housing)- Identical to 1996 EXCEPT the addition of a transmission ground wire in the harness. This was done to address poor transmission grounding issues on the previous models. Can be interchanged with the 1 piece bell housing, but the ground wire should be added to the harness if you are using the 2 piece. 2 piece bell housing models also had hardened sun shells to address the sun shell fracture issue common to the previous model automatic transmissions. Identical in fit, function, and design, the material just changed. 13 pin connector.

1998- Identical to 1997 2 piece bell housing.

1999-up Identical to 1998 and 1997 2 piece bell housing

anesthes

iTrader: (12)

I don't know how accurate the above information is. I find it odd that the aftermarket controllers only care about PWM or non-pwm transmissions.

When I do a interchange, 96 and 97 come up when searching for a '96 camaro 4L60E. Interestingly, when I swapped my '98 I used a trans from a 95-97. (1pc case) I don't know exactly what year. I'll go look at the label in a bit.


-- Joe

gilly327

excellent video. I guess I could just go pull the transmission from the truck I got the pcm from and should be fine.