How can i check to see if my H2 has the original transmission or if its a replacement one ??? Im asking because since im already at 150k miles and im feeling symtons of a dirty fluid no one around here wants to do a flush because they are thinking it has the actual 150k miles on it may just kill my trany if they do the flush ;-( .....

 

I can't answer your question; however, wanted to recommend Grease Monkey for a tranny flush. I take all my vehicles there.

 

I like to drop the pan and replace the filter and refill.

 

Phil my local dealer wont even touch it and the same goes for other places around here . The main thing that im seeing now its at slow speeds a small hight rev going from 2nd to 3rd gear but once the trany get warm up it hapends less offten But it does hapend once i get up to speed on the freeway the truck shifts like it was new off the lot ..

 

Just the filter and refull.... ''DON'T DO A FULL FLUSH!!''
If you used to change the transmission fluid regularly then you could have done a full flush.
From what I've heard, is the old transmission fluid has a dirty coating on all the internal parts, New Transmission fluid acts like a detergent that would drake down the old oil sludge and clogs passage ways ..
I bought my 08 H2 last year with 84,000 Km or 52,159 Miles Used.
Just to play it safe I changed the filter and Refill..
I had to remove the 2 bolts from the exhaust flange in order to get the transmission oil pan out.

 

Before you buy Transmission oil read this

GM: No Dexron VI ATF in Transfer Case - Hummer Forums by Elcova

 

Man of war i remember that thread at elcova . Thanks for posting the link ...

 

If dirty fluid is the only thing keeping a transmission working it's on borrowed time. I would drain and fill with new fluid/filter.

 

I stand by my transmission flush post. What I do is alternate filter replacement/fluid change with a transmission flushes. This also flushes out the torque converter. I have this done ~30K miles and have never had any problems.

Automatic Transmission Fluid Exchange

The fluid exchange removes and refills nearly 100% of the transmission fluid held in the transmission, including the torque converter.

Automatic Transmission Fluid Exchange with Filter

The transmission pan is dropped and cleaned, and a new filter and new gasket are installed. Then the fluid exchange is performed, which removes and refills nearly 100% of the transmission fluid held in the transmission, including the torque converter.

Note: Per the manual, change the transmission fluid, torque converter fluid and filter every 50K miles (severe) or 100K mildd (normal). I perform both at ~30K miles

 

Same here. every 30k miles.