Transmission blown .... again :(

[OrangeCrush]

DRZ,

I'll post more info. My H2 has been gone for 8 months getting the conversion. I'm supposed to get it back next week (12th or 13th)

I'll let you know more when I physically have the damn thing in my hands...lol.


Mark

Originally Posted by DRZDuke

Thanks so much for the quick and very helpful replies. I really appreciate it.

Orange Crush, If you don't mind, I'd love to hear in more detail about the whole Duramax/Allison conversion, such as costs and where you are having it done etc ...
I can't really afford either option right now, being on disbility and a fixed income but I was thinking that when I can, the Duramax would be the way to go.Could you PM me with some info or e-mail me at dlaycock@shaw.ca

For now it looks like I'll have to park the ol' H2 for a while and drive my old beater or sell the beast as is to someone who can afford to fix it.

[H2R]

I hear about these tranny issues all the time. I have had good luck with my 2003 but I did everything before it any issue happened or overheating occured. When I put the oversized cooler the temp never went above 150 (which is ideal) even in the highest heat of the south east. I have used and oversized Trans pan and the truck is supercharged. I also took out the flow of trans fluid thru the radiator as well. no external fans or gadgets everything has worked well. It could be that I have had good luck but I think one of the key things is keeping the temp under control so the fluid viscosity doesnt breakdown and loose its effectiveness. Glad not to have ever needed a new tranny in either of the trucks. O and one other thing I sometimes tow my 31 foot Boat as well.

[HumminNBoatin']

I know a guy who did a 4l80e conversion to his for the same exact reason as you. However he had to take it to a custom shop to have it done. He is located in Indianapolis. Where are you located?

When doing a 4l80e conversion you have to have a new center crossmember made for the truck and new driveshafts made.

The 4l65e is a good transmission. But its only rated to take like 385ft. lbs and roughly the same 385HP. In most rear wheel drive vehicles that are lighter in weight they work just fine and when you lay the power down the tires break loose first. But in a HUMMER with AWD something has got to slip and it takes alot more power than 385ft. lbs to break 4 tires loose from the ground under a 7K# truck.

If you dont lay the throttle down all the time a stock trans will do fine for a while. But if you like to hammer down it will fail in no time.

[Badace]

I have bigger 35's on my truck (wider). It sucks pulling a trailer. My 5.3l 01 z71 and my wifes cadillac escalade esv with a 6.0l pulls like crazy. My h2, eh. Lacks a lot. Any ideas on how to get it pulling? Its rated for more than 8klbs. If I pulled 8klbs with it, it would pull out a gun and shoot me in the face.