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Old 03-25-2014, 12:16 PM
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Join Date: Feb 2013
Location: nyc
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jsoto is on a distinguished road
Thermostat - Wire Harness- M54 Trans

Just wanted to share my experience

I was getting some weird shifting issues. Would not upshift to 4, high RPM at 3 at times. At the Same time, when I went off a offramp, 2, 1 and then high RPM at 1st gear. I did feel a powerloss - but I was also not heavy on the throttle, knowing I had to drive 60+ miles to the tranny ship.

Diag pulled up temp sensor on the 5HP24 oil pan.
Wire harness replaced.

I've yet to rack up enough miles on it to confirm the shift fluctuations are gone BUT my POWERBAND is back. Meaning, no faults on cluster, yet there was this strange powerband loss in all gears. I guess however it talks to the ECU, solenoids, etc with the failing thermostat had some effect on the whole system itself.
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