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Leaf spring & shudders

Posted: Tue Dec 09, 2008 8:02 pm
by chugga
Has anyone had any problems putting new leaf springs with 2'' lift and then get rear end shudders? Mine are only happening at 80k now. I have narrowed the problem down to the drive shaft angles since the lift. I lowered the gearbow mount to compensate but I am really need some advice.

Posted: Tue Dec 09, 2008 8:30 pm
by BundyRumandCoke
Try putting spacers between the gearbox cross member and the chassis rails. Reduces the tailshaft angle even more. I think mine are 2 x 3/8 plate, so about 3/4 drop.

Posted: Wed Dec 10, 2008 6:39 am
by chugga
Thanks. I did that and it works. Does it do any damage to the engine mounts?

Posted: Wed Dec 10, 2008 9:02 am
by MightyMouse
Another option might be to space the engine mounts up... same net effect and doesn't sacrifice ground clearance.

However I can't recall if that would create a clearance problem ( mines not standard ) with the bonnet so measure first.

Posted: Thu Dec 11, 2008 9:27 am
by chugga
You mean space them down?

Posted: Thu Dec 11, 2008 10:11 am
by MightyMouse
No to correct the driveline angle you need to space the two front mounts up - thats equivalent to spacing the rear crossmember down.

The transfer case rear output shaft needs to be more alligned to the diff pinion shaft, although this then disturbs the front drive shaft to diff alignment. As you unlikely to be going fast in 4WD this change in front drive angle is unlikely to give you grief.

Posted: Thu Dec 11, 2008 10:43 am
by chugga
Thanks ill give it a go :)

Posted: Tue Apr 07, 2009 3:09 pm
by fat496
MM how did you go about spacing the mounts up on yours? because if i do that it will help with my pinion angles and get my fan back up a bit closer to the center of the radiator, after i did 2" body lift.