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Pinion angle LB7 Duramax


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Hello everyone. Upon pulling a heavy car hauler trailer the other day I was looking at the gap between my bump stops and my axle and noticed my whole diff seemed to be pointed skyward putting the pinion angle at a very bad angle I've also been fighting with a vibration at around 60 MPH and a slight hopping feeling the picture I will attach. It definitely does not look right. Any thoughts on why it's this way or what happened? It has blocks but they are flush so I don't see how it could have tilted the axle without having a gap somewhere??? Any ideas ? 

PXL_20230624_185942355.jpg

PXL_20230624_191358672.jpg

PXL_20230624_191404854.jpg

Edited by Craig650
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17 hours ago, Craig650 said:

Hello everyone. Upon pulling a heavy car hauler trailer the other day I was looking at the gap between my bump stops and my axle and noticed my whole diff seemed to be pointed skyward putting the pinion angle at a very bad angle I've also been fighting with a vibration at around 60 MPH and a slight hopping feeling the picture I will attach. It definitely does not look right. Any thoughts on why it's this way or what happened? It has blocks but they are flush so I don't see how it could have tilted the axle without having a gap somewhere??? Any ideas ? 

PXL_20230624_185942355.jpg

PXL_20230624_191358672.jpg

PXL_20230624_191404854.jpg

Thats your vibration who ever installed those blocks they are the wrong degree taper making your driveline angle way off creating the vibration remove the block and get blocks with less degree taper. Just looking at the picture those blocks and its hard to tell appear to be around 8 degrees or more you probably need about a 3 degree block to correct the driveline angle. Also if you get new blocks get new "U" bolts. That diff needs to be inline with the driveshaft or very close.

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