Pinion Angle Woes-Long
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Joined: May 2004
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From: Sunny FL
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Joined: May 2004
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From: Georgia on my mind...
Mine has a slight driveline vibration since I installed the DJM 2" shackles on acceleration from 20-30 mph, any higher or lower than that and it's not there. It's not really that bad to me anyways, but it's noticeable.
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Joined: May 2004
Posts: 5,409
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From: Sunny FL
Originally posted by Quintin
Mine has a slight driveline vibration since I installed the DJM 2" shackles on acceleration from 20-30 mph, any higher or lower than that and it's not there. It's not really that bad to me anyways, but it's noticeable.
Mine has a slight driveline vibration since I installed the DJM 2" shackles on acceleration from 20-30 mph, any higher or lower than that and it's not there. It's not really that bad to me anyways, but it's noticeable.
Technical Article Contributor
Joined: Oct 2004
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From: Central KY
I just installed my Ground Force 2" shackles and got a slight low speed vibe. I installed the shims according to the instructions with the thick part facing the rear of the truck. The shims worked, no more vibe. The shims were marked as 2.5 degree. 
Member
Joined: May 2004
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From: Dallas area
Duggins
Originally Posted by SVTErick
i would be willing to bet more than likely most people are 'feeling' something that isnt there. if one truck needs them then everyone with the DJM shackles and McGaughys lowering kit would need them. 
installing shims when their not needed can actually throw your driveshaft out of whack instead of helping it
installing shims when their not needed can actually throw your driveshaft out of whack instead of helping itWho has ordered just 2 deg shims only for the '04 - 05 and installed them. I'm concerned about how they are secured.
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Joined: Aug 2005
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Shims...
I just purchased the 2-degree shims from StylingConcepts... tried to install it this weekend and realized after jacking up the truck and unbolting the U bolts that the opening on the shims were too narrow for the two "pins" on the leaf springs. Also, the opening on the shims are too short. I think the shims were made for the single pin leafs rather than the double pin leafs that the 04's and up have. I will have to end up opening up the slot on the shims by making it longer and wider to fit both pins. A real PITA! Oh BTW, my vibration occurs at about 24 - 26 mph. This was all after installing the shackles.
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Joined: Oct 2004
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From: Central KY
Yep, they sent you the wrong shims. The ones that came in my Ground Force kit were cut out properly for the 2 pin spring pack the 04-06's have. You might see if you can order them seperately. The part number for the 2" drop shackle kit I used is GRF-91200. If you get those shims, they fit with no cutting. Sorry to hear about the vibe, mine had it too after the drop until I shimmed it.