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Suspension 3rd Gen Dodge Ram Suspension Problems and Questions


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  #1  
Old 06-27-2010, 12:13 AM
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Default Vibration in the Rear

After I bought my '08 a few months ago I started to notice a slight vibration in the rear of the vehicle. The steering wheel wasn't vibrating at all and it didn't seem to happen all of the time. I wasn't sure if I was crazy or if I was just not used to the ride of the Ram. After a couple of weeks I decided that I was feeling a vibration and I decided to take it to the shop to have them check it out. They checked the u-joint on the drive shaft (no issues) and then checked the tires. The tech noticed some cupping and feathering on the front tires (shame on me for not seeing it) and then checked the alignment. The alignment was off slightly and he corrected it. He then rotated the tires to get the cupped ones on the back after re-balancing all four tires. I've had it back for about a month now and the vibration seems to be getting worse. It seems like the vibration is only noticeable between 55-60 mph. Above 65 and I don't seem to notice it. Could this be from the tires "wearing even" from the cupping? I was thinking that maybe the tires weren't balanced properly, as I've heard that it is best to spin balance the bigger wheels like 20" ers. Just looking for some suggestions as I really love the truck, but it's really pissing me off with this vibration. I bought, and will be installing this week, Bilstein HD's all around. I really don't think this will solve my problem, but hopefully it will stiffen up the chasis a bit.
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Old 06-27-2010, 12:23 AM
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I was going to say the balancing of the tires. Usually you do feel vibrations at higher speeds if it is that. Or it could be a hub if it is getting worse.
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Old 06-27-2010, 07:49 PM
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Scat, you ever find yourself in Niagara Falls? I was driving around Target a while back and I saw a Ram with som Scat badges. Just curious.
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Old 06-27-2010, 08:31 PM
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I'm sure the tires were spin balanced but were they road force balanced? When they checked the u-joints did they check for looseness or did they pull the drive shaft and check for binding as well?
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Old 09-01-2010, 10:36 AM
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I had a suspension bounce\vibration problem unrelated to road surface on my 2002 4x4 1500 Quadcab. This bounce was never felt in the steering wheel either. It wasn't related to a particular speed although at times it seemed to hit a harmonic at different "sweet spots" on the speedoemeter. It was wierd that way. First I went through all of the tire gyrations (i.e., balancing, rotating, balancing, rotating the spare around). Then I had the main rear drive shaft checked for run-out and balance. Next was a new set of tires....the two front replacements because I thought they were bad "new" tires. After all of this I still had a cyclic bounce type of vibration when drivng this truck. I took the truck a drive train specialty guy in Concord NC. He checked run out on all four wheels and the front drive shaft. He showed me an out-of-round tire on the rear. I replaced all four tires with the high-end Michelins and four shocks - still had the bounce, so I took it back to the specialty guy. While it was on the lift, I showed him some very minute movement that could be created by pushing the CV axles. The slight movement could be felt on the splined ends of both axles - but it did take significant effort to see the movement. We agreed to order two new CV axles. Once the CV axles were installed all the bounce went away. Thank you Jesus!. The splines were worn on the old axles. At some point the seals deteriorated enough to allow some moisture in which resulted in rust in the splined areas. Eventually a minimal amount of play developed and the bounce started. This was a long, frustrating process (about a 24 month evolution) that was also expensive. I think it was about $1200 for the axles and troubleshooting. $600 for the first set of tires that really weren't ready for replacing. Many trips back and forth to shops, etc. It was crazy. Now my truck is finally riding smoothly again. Add on a trip to the dealer for a 150K mile tune up, change all fluids, clean injectors, replace acceleration sensor switch, to the tune of about another $1200. It's an '02 with 153K miles and I'll be driving in on for a good while longer.

JB
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