I have a Tahoe with intake, exhaust, vette servo and blackbear street tune. My truck has almost 30k miles. I myself have put only about 10k miles on it. Changed the fluid and filter once and everything looked ok. After i got it tuned i noticed a weird squeak after shifting into 2nd at full throttle, almost like tire churp but not them, that sounded like it came from the trans. The line pressure was increased in the tune. The trans does feel solid and doesn't slip. Has anyone experienced a sound like this?

 

Its the serp. belt slipping. Get a new one and presto, no more noise.

 

Oh man your good, makes sense. I never woulda never thought about that

 

LOL Me niether, but mine was doing it after the trans work I had done. Replaced the belt,for different reason and it was gone. Plus, I read that somewhere about it here.

 

Alright thanks for the advice and i'll get it done. What all you got done to your trans?

 

At the time I had the noise it was shift kit, servo and tuning. Last month I had chase put in a built trans with 2600 stall(actually a 3300ish) and the already done shift kit and servo.

 

Okay cool. Howd you like the shift kit on the stock trans? And were you sprayin on the stock trans any?

 

First 3 were all GM. My 4th and last is FLT Stage 4 4L60E w/Vig 3400 and Sonnax Servos 1-2 and 3-4. Oh, and B&M Cooler.

This should give you an idea how reliable GM transmissions are.

 

Yeah i know these trans arent that great. I get nervous every time i floor it lol