QC pinion angle problem

[mtgbkr200]

I was wondering if anyone else has had this problem.

I have an 06 QC that I put Boomer's lowering kit on. Everything went fine but the pinion angle refuses to stay at -3. I've redone it three times, even though I loosen everything it's hard to force the axle down that much but when I finally get it there I tighten everything and then the first time i get on it I will hear a light bang and when I re-check it the angle has gone back to zero.

I was wondering if the axle mounts could be of enough that the the cradles won't allow enough adjustment in which case would I need to shim it?

Any input would be greatly appreciated as it's driving me nuts!!!!

 

[eddie102870]

are you getting any vibration?

 

[Blakewilder]

Is it whining?

 

[mtgbkr200]

The only thing I've noticed is a very slight shudder when taking off (May have done that before, not sure) but on the highway it's smooth. No whining at all.

 

[eddie102870]

mine does that from time to time when turning onto a highway but it did it before i lowered it.

 

[BOOMER]

the metal bar that comes with the axle support should help hold the rear end at the 3 degrees downward pinion angle-thats why you thread the front bolt thru the nut further than the rear bolt.
you might want someone to hold the rear end there while you tighten the ubolts. the ubolts are what really holds the rear tight. so make sure you are torquing them to around 75ftlbs, and do it in an even manner.

 

[mtgbkr200]

Hey Boomer,

That's the way i did it the last time, actually had it at almost -4 degrees in case i lost some when i tightened it down.

The front bolt is in farther than the back, this thing just seems to have a mind of it's own!!

Have you ever had one that you had to shim?

 

[BOOMER]

Hey Boomer,

That's the way i did it the last time, actually had it at almost -4 degrees in case i lost some when i tightened it down.

The front bolt is in farther than the back, this thing just seems to have a mind of it's own!!

Have you ever had one that you had to shim?

nope, it sounds like the ubolts are not tight enough. start there first. call me if you need help, i am here