Hummers with 37's need help

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Mar 31, 2017 | 02:29 AM

#21

Baldfox

Senior Member

Joined: Nov 2014

Posts: 478

From: Moscow

Quote:

Originally Posted by LoJac963

That all depends on the condition of your torsion bars. If the bars are newer and have most of their spring left in them, cranking the stock keys will suffice. If you have an older year chances are the torsion bars are a little work and you would need green keys or a similar lift key to gain the same height.

I did the green keys and gained 3" lift in the front without any change in ride. Tie bar angles are a little tight after my XD tie rod install but the stockers looked the same.

Yeah could well be the case, i got an 09, with <20k miles on it.

Apr 6, 2017 | 08:45 PM

#22

legerwn

Thread Starter

Senior Member

Joined: Apr 2010

Posts: 1,006

From: Deep South Louisiana

I raised mine with the factory keys and actually had to lower it a bit as it was a little past level.

I tried the tow/haul switch while towing but didn't like the way it shifted (wanted to stay in to low a gear (high rpm)). I used the manual shift setting to put it where I wanted it and it did real good. Most of the towing was done with the trans in OD but I didn't care for the way it downshifted so often. Using the manual setting limits the high gear the trans will shift to.

I don't think the truck empty will have any issues with 37's and if I need to tow I can just limit high gear to something other than OD.

I'm still trying to pick a tire, to many to choose from,

Neal