I am starting to get some demand for pumping up the H2 Hummer. We have one in the shop right now and would like to baseline it before the H/C package. I am wondering if the front shaft is removed if it can be pulled? I did get into the PCM and see that the traction control and T/M will need to be shut down as well as a few other parameters. Anyone here got any info on the H2 being pulled??

 

I've been taking mine to the drag strip to guage performance gains. I've heard of the front shafts being pulled, but I didn't feel there were enough cases of it being done for me to be willing to risk my own transfer case.

I think there is also sometimes a track width issue but I'm not sure on that one either.

 

This one is an 05' and we yanked the driveshaft and put it on the dyno. After disabling the antilock brake system and making a few PCM changes we got it to pull. However something in the PCM is still pullling timing out as the power is dropping off at 3500 while the motor still pulls to 5000.

As far as the transfer case; can't get a defined answer either way. Thats what the warranty is for!

I have to spend some more time looking at the spark tables as well as the ETC.

It does fit our Dyno Dynamics dyno!