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Old 10-13-2017, 11:08 AM
nhra78 nhra78 is offline
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Re: 4T65E Not Shifting 2002 Monte

Quote:
Originally Posted by Blue Bowtie View Post
Aside from exchanging the PCM it might be helpful to test line pressure:

https://www.youtube.com/watch?v=CNjDiPFcKuU
Thanks for the link on checking the pressure.

The pressure was a little high in park around 110psi and when I pulled the connector to put it in the high pressure loop it looked fine around 260 psi.

I talked to a mechanic friend and described the problem to him and he thinks it is a mechanical problem.

I did change the PCM with 2 different ones. It had a slightly different reaction. I drove the car with the scanner hooked up, when solenoid 1 turned off to attempt to shift to second gear I could feel a small hiccup in acceleration. When solenoid 2 turned off to shift into 3rd it was like it shifted to neutral. The original PCM would accelerate until I let off the throttle.

At this point I am convinced that it is a mechanical issue. I got a salvage yard tranny with 53k miles on it for 300 bones so unfortunately I will not have a root cause for the condition.
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