Adjusting Torsion Bars

[bigrockk]

2007 GMC Ext Cab, 2500HD, 6L Gas, with 195,000 KM

Well I’m down to the last step before a final safety check. The garage that did the initial inspection said the front was too low but I am now wondering if they have it backwards?

The control arms are actually sitting on the “rubber bumpers” that are mounted beneath them. What I am wondering is will raising or lowering the front end move the control arms away from the rubber bumpers, or is it normal for the control arms to rest on these bumpers?

I touched on this in an earlier post and Jcat mentioned that the goal is to have the CV shaft level.
It looks to me as the outboard CV (closet to the Wheel) is higher than the inboard CV.

So what I am wondering is if the truck really needs to be lowered, not raised. Wouldn’t lowering the front end move the control arms away from the rubber bumpers and level the CV’s?

Sure hope this makes sense and thanks again guys for all of the help so far!

Hmm, sitting here thinking about this right after posting and it now seems that the only way to level the cv's is too raise the truck..I should have thought about this a little more before posting

[bigrockk]

Well I have lifted the truck to the point where the cv shaft is level (or very close too) I measured the right and left side to the ground and they are equal...now the weird part is the rubber bumper for the drivers side is clear of the control arm but the passenger side is not, what gives? Any ideas ?

Also, does the cv shaft need to be perfectly level?

[j cAT]

Originally Posted by bigrockk

Well I have lifted the truck to the point where the cv shaft is level (or very close too) I measured the right and left side to the ground and they are equal...now the weird part is the rubber bumper for the drivers side is clear of the control arm but the passenger side is not, what gives? Any ideas ?

Also, does the cv shaft need to be perfectly level?

what I said was not level but straight,,,no angles, the axles joints do not flex etc....this means that if correct the front diff is slightly higher than the hub....the plastic bumpers are very slightly off the lower control arm .....then just to double check measure from the frame on each side to compare how close it is ...driver side may be lower cause of the fuel tank ....how much fuel??????????????....this changes things slightlly....

[bigrockk]

Well finally passed the safety check...thanks to everyone for the help.

JCat I really appreciate all of the good info...thank you!

[j cAT]

Originally Posted by bigrockk

Well finally passed the safety check...thanks to everyone for the help.

JCat I really appreciate all of the good info...thank you!

I just want to add that , whenever you change vehicle height your front end alignment changes .....when going higher you get more TOE...wheels are not parallel to each other but are closer in the front side than back ...this causes the outer edges of the tire to wear more..........

the camber can also be off,,,you may find that the vehicle drifts to the lft/ rt ..