2000montana

2000 Pontiac Montana transmission swap

1 post in this topic

I have a 2000 Pontiac Montana and a few weeks ago my transmission (4T65E) failed so I replaced it with a transmission out of a 2003 Pontiac Aztec.

As far as I can tell the final drive / gear ratios are the same, but I could be mistaken.

I am getting a fault code of P1810 (TFP position sensor) from the PCM and it is also getting torque lockup occasionally.

Apparently sometime in 2002 the TFP assembly was updated (TSB #020730050) and I am concerned that my PCM need to be reprogrammed to accommodate this change.

The transmission is in what I presume limp mode and I don’t get top gear. Although on one particular day (just as the first fault code first registered) it was shifting in all gears.

Hopefully you can help with the above problem.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now