4L60E electronic control differences?

[87Skier]

Doing some research for an engine swap and I have a 1996, 4L60E with a cast-in bellhousing that I plan on running behind an LM7 (probably an 04-05). Will the factory computer (from an 04-05) control this transmission?

If not, can it be re-flashed to do so?


PS: I am using an older transmission because I already own it, and it will match up with my circle-track NP205 without spending $$$$.

Thanks!

[James the III]

Originally Posted by 87Skier

Doing some research for an engine swap and I have a 1996, 4L60E with a cast-in bellhousing that I plan on running behind an LM7 (probably an 04-05). Will the factory computer (from an 04-05) control this transmission?

If not, can it be re-flashed to do so?


PS: I am using an older transmission because I already own it, and it will match up with my circle-track NP205 without spending $$$$.

Thanks!

was that lm7 backed with a 4l60e or a 4l65e?

[aruss99]

I don't know specifically for the 4l60e's, but I am pretty sure that the pre 99 models of the 4l80e changed slightly, making it more difficult to work with the lm7. I do not know if the same thing occurred with the 4l60e's

[87Skier]

I plan on using an LM7 that originally had a 4L60E behind it. Will it matter if it is a 60 or 65?


I remember reading something a while ago about the later model 4L80E stuff used another turbine speed sensor. Might be something else too.

[Bigdav160]

So you want to use a '95 4L60e behind a carbed 350 and control it with a '96 computer? Make my head hurt. I don't know for sure. I copied and pasted this from another forum.

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.

[clinebarger]

1996 to 2008 4L60E & 4L65E are all electronically compatible with each other.

Using a 1995 4L60E would require installing a 1996 & up 3-2 solenoid to make it electrically compatible.......Along with blocking the 3-2 downshift valve inboard to make it hydraulically compatible.

1993 & 1994 4L60E's require a Valve Body swap to work with 1996 & up PCM/ECM.

You will need a Crank Spacer & Redrilling of the Flexplate to make ANY earlier "298mm" 4L60E work with a LS engine.

[87Skier]

Originally Posted by clinebarger

1996 to 2008 4L60E & 4L65E are all electronically compatible with each other.

Using a 1995 4L60E would require installing a 1996 & up 3-2 solenoid to make it electrically compatible.......Along with blocking the 3-2 downshift valve inboard to make it hydraulically compatible.

1993 & 1994 4L60E's require a Valve Body swap to work with 1996 & up PCM/ECM.

You will need a Crank Spacer & Redrilling of the Flexplate to make ANY earlier "298mm" 4L60E work with a LS engine.

Thanks clinebarger!

I knew there was some difference just couldn't remember which years.

Also, thanks for noting the 298mm/300mm. Wasn't sure about adapting them, but knew I needed a spacer.