H2 Tranny Slip ???
 

Not sure if it is actually slipping, but I have noticed at around 55mph, and going up a gradual incline, instead of shifting it seemed to slip. I have noticed this a couple of times, in the past week.
Today I also noticed that my tranny temperature seemed a little warm. When it's around 40 degrees outside, the tranny never gets above 130 degrees.....even when it's 90 degrees out it never gets above 160 degrees.
But today I noticed that it hit 172. I was only idling, and usually it will cool down when idling....checked the level, and it was perfect.
not really sure what is happening, and was wondering if anyone has experienced this? 2008 H2 with 6.2V8 and 6 speed tranny

Re: H2 Tranny Slip ???
 

it's under warentee ,bring it in

Re: H2 Tranny Slip ???
 

dealer could care less unless it's completely broken and showing a code.....

Re: H2 Tranny Slip ???
 

Hi sounds like most dealers, remember it was only a $60,000 truck hehehe, their is a program update for some 2008 i had it done. I had to tell the dealer their was a TSB for the trans because they did not know about it. After i told them they checked for the TSB then they would reprogram it for me. This TSB will not be your problem but here is the TSB below. The dealer will not tell you about it you must bitch about the trans clunking in first gear when the throttle is pushed then released. Then they will reprogram it.


TECHNICAL

Bulletin No.: 08-07-30-012

Date: March 13, 2008

Subject:
6L80 Automatic Transmission - Tip In Low Speed Clunk in First Gear When Throttle is Applied and Released, Engine Braking Sensation at Low Speeds (Reprogram TCM)

Models:
2008 HUMMER H2, H2 SUT

with 6L80 6-Speed Automatic Transmission (RPO MYC)

Condition

Some customers may comment that the vehicle has a "Tip In" low speed clunk in first gear when the throttle is applied and released in normal "D" drive. Other customers may comment on an engine braking sensation at low speeds in normal "D" drive.

Correction

A revised transmission calibration has been developed to address these issues. Reprogram the transmission control module (TCM) with updated calibration files using the TIS2WEB Service Programming System (SPS) application. As always make sure your Tech 2(R) is updated with the latest software version.

Warranty Information




For vehicles repaired under warranty, use the table.




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