Help shudder from take off.

robp823 · 11-30-2012, 07:03 PM

I recently leveled out my truck.Installed 2 inch blocks in the rear.Now from take off i get a vibration from the rear.Do i need to go with some angle shims???

SST 1953 · 11-30-2012, 08:39 PM

Bad pinion angle, you will have to put the wedges in to get less angle.

robp823 · 12-01-2012, 04:22 AM

thats what i was thinking.Anyone run into this and know what angle shims i need or am i gonna just have to test and tune?

SST 1953 · 12-01-2012, 09:37 AM

You will have to put an angle finder on the driveshaft and yoke on the third member. The pinion yoke should be right at 0 degrees. You should be less than 7 degrees between the 2 angles. If you have that much angle there are probably marks on the end of the driveshaft and pinion Yoke. Summit racing or Jegs will have the wedges you need. 3 degrees would be about perfect for the angle and should not have a problem when loaded

11-30-2012, 07:03 PM	eBay Motors #1 (permalink)
robp823 Junior Member Join Date: Jul 2008 Posts: 91	Help shudder from take off. I recently leveled out my truck.Installed 2 inch blocks in the rear.Now from take off i get a vibration from the rear.Do i need to go with some angle shims???

11-30-2012, 08:39 PM	eBay Motors #2 (permalink)
SST 1953 DuramaxForum Veteran Join Date: Mar 2012 Location: Casper, Wyoming Posts: 1,130	Bad pinion angle, you will have to put the wedges in to get less angle. __________________ 2007 CCSB LBZ. EFI live DSP 5 by Rob @ ATP EGR blocked, PVC reroute AirDog II 165 TransGo Jr/pump rub mod Firestone bags 4" MBRP Edge Insite CTS w/ backcam Cognito W/Bilsteins 69 Camaro S/ST-S/Gas

12-01-2012, 09:37 AM	eBay Motors #4 (permalink)
SST 1953 DuramaxForum Veteran Join Date: Mar 2012 Location: Casper, Wyoming Posts: 1,130	You will have to put an angle finder on the driveshaft and yoke on the third member. The pinion yoke should be right at 0 degrees. You should be less than 7 degrees between the 2 angles. If you have that much angle there are probably marks on the end of the driveshaft and pinion Yoke. Summit racing or Jegs will have the wedges you need. 3 degrees would be about perfect for the angle and should not have a problem when loaded __________________ 2007 CCSB LBZ. EFI live DSP 5 by Rob @ ATP EGR blocked, PVC reroute AirDog II 165 TransGo Jr/pump rub mod Firestone bags 4" MBRP Edge Insite CTS w/ backcam Cognito W/Bilsteins 69 Camaro S/ST-S/Gas

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12-01-2012, 04:22 AM	eBay Motors #3 (permalink)
robp823 Junior Member Join Date: Jul 2008 Posts: 91	thats what i was thinking.Anyone run into this and know what angle shims i need or am i gonna just have to test and tune?

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