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GreenmtnTitan · 12-03-2007, 09:34 AM

I have the exact same truck and the EXACT same problem.

The shimmy was there during our test drive of the truck and we assumed it was just a tire issue as well. The dealer first balanced the front tires to no effect then the rears. Still had a chassis shimmy that didn't really come through the steering wheel but was only noticeable on very smooth highways at 68-76 mph. The dealer called tech services but they had no data on a problem like this.

I convinced the dealer to pull a completely different set of wheels and tires off of another new '08 NON pro-4x. This was still a set of the same 18" wheels but had the Goodyear tires instead of the BFG's (IMHO the BFG's suck anyway). No change to the vibration.

This left us with the problem being in the chassis or driveline. The dealer said that they were willing to tear into them but recommend that I put some miles on the truck to see if it is a "break-in" issue that would go away on its own. I've put over 6k miles on now and the vibration seems to have improved some BUT it may be that I've just gotten used to it.

I'm very suspicious of the driveshaft. Mine has a lot of balancing weights welded onto it (like 6+ of them). It looks like the factory had a hard time getting it to balance. How many weights do others have on their driveshafts?

I had also found a TSB for older (06 and older I think) model trucks that addressed a vibration throughout the trucks that was caused by a misalignment between the driveshaft and the differential (the differential is actually angled improperly). The TSB prescribed a shim kit to fix the problem. This may be my next request to the dealer if I find here that multiple weights on the driveshaft are normal.

Let me know what your dealer does.

12-03-2007, 09:34 AM	#8 (permalink)
GreenmtnTitan Registered User iTrader: (0) Join Date: Mar 2004 Location: Roseville, CA Posts: 40 Thanks: 0 Thanked 0 Times in 0 Posts	Re: 08 with death wobble & vib I have the exact same truck and the EXACT same problem. The shimmy was there during our test drive of the truck and we assumed it was just a tire issue as well. The dealer first balanced the front tires to no effect then the rears. Still had a chassis shimmy that didn't really come through the steering wheel but was only noticeable on very smooth highways at 68-76 mph. The dealer called tech services but they had no data on a problem like this. I convinced the dealer to pull a completely different set of wheels and tires off of another new '08 NON pro-4x. This was still a set of the same 18" wheels but had the Goodyear tires instead of the BFG's (IMHO the BFG's suck anyway). No change to the vibration. This left us with the problem being in the chassis or driveline. The dealer said that they were willing to tear into them but recommend that I put some miles on the truck to see if it is a "break-in" issue that would go away on its own. I've put over 6k miles on now and the vibration seems to have improved some BUT it may be that I've just gotten used to it. I'm very suspicious of the driveshaft. Mine has a lot of balancing weights welded onto it (like 6+ of them). It looks like the factory had a hard time getting it to balance. How many weights do others have on their driveshafts? I had also found a TSB for older (06 and older I think) model trucks that addressed a vibration throughout the trucks that was caused by a misalignment between the driveshaft and the differential (the differential is actually angled improperly). The TSB prescribed a shim kit to fix the problem. This may be my next request to the dealer if I find here that multiple weights on the driveshaft are normal. Let me know what your dealer does.