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Hummer Knowledge Base

The Hummer Knowledge Base

Alignment Tips:

How to align:

Make sure that you check that front end parts such as the idler arm, pittman and tierod ends before you start. If any of these are worn you have to replace them before you align the truck.

If you have a truck that's older then 97.5 then the caster and camber is set by changing shims on the upper A arm brackets. To do this you remove the tire/wheel, put a jack under the geared hub, take off the two bolts that hold the upper A arm to the bracket. You then have to loosen the bracket (which can be a pain) and slide out or add shims. Then you have to put the whole thing back together. Then you have to recheck the alignment. If you are off you have to go through the whole process again. If you need to adjust all 4 it will take at least 1 hr to do each wheel. Once the caster and camber is correct you have to adjust the toe on all 4 wheels. Often time one or more of the tierod ends are seized up and won't turn. Then you have to take them off the truck and attempt to loosen them with a torch. That's why I always put antisieze on my trucks tierod ends. This is why it can take from 4 to over 8 hours to do an older truck. The newer truck take less time because AMG installed adjustment cams on the upper arms so all you have to do is loosen the bolts and turn the cam to adjust the caster and camber.


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