firemedic10584
Ram Guru
So like many of you, I've had the famous "clunk" sound/feeling when going over bumps at low speeds. I've changed parts out, tightened every bolt down I knew to tighten, lowered my Bilstein 5100s thinking maybe they were getting maxed out. All for nothing. I found one video, which I posted on this page a week or so ago, where a guy with a TRX described the exact same issues I and many of you were having. He made a good video showing how the body mount bushings/isolators were a poor design and Ram had updated part numbers for a better designed piece. I was skeptical since every "fix" I've tried in the past really made no difference. But after driving today, I could not get the clunk sound to produce going the same route I always travel and 99% of the time always get multiple clunks along the way.
Install was straight forward. You only want to do one side of the truck at a time. There are 4 bolts to loosen/remove. The front mount, where the tow hook would attach to, I just loosened, I did not remove it all the way. This was the hardest one to get loose for some reason. The mount under the A post and B post, I took those bolts completely out since that is where these new parts need to be swapped out. The C post mount I just loosened. Using a floor jack and a 2x4, I jacked the cab up placing the jack right at the pinch weld area between the A and B post area. Initially, the whole truck, cab and bed, were raising, but it then separated and just the cab began to raise. You only need to raise it enough to slide the top isolator from the "A" post mount out. Once you swap out that top isolator, you can lower the cab back down since the bottom pieces just attach from the bottom side.
As you can see from the photos, the "old" top piece, there was no rubber on the left and right side of that metal centerpiece. The new updated part number now has rubber completely surrounding the metal piece which is where I believe the clunk noise was being produced from. The lower absorber parts, you can see the difference in the height of the rubber section. The old parts had a decent-sized gap between the rubber and where it met the metal of the mount on the truck. The new parts eliminate that void space, removing any additional movement.
Here are the updated part numbers -
68589984AA - Bottom absorbers (x4)
68487213AB - Upper Body Hold Down Cushion (x2)
Let me know if you have any questions - hopefully, this will be the fix for those of you who also have been unsuccessful at solving the clunk. I also think this solved my mystery vibration I get at random speeds and confirmed it was not my wheels and tires.
Install was straight forward. You only want to do one side of the truck at a time. There are 4 bolts to loosen/remove. The front mount, where the tow hook would attach to, I just loosened, I did not remove it all the way. This was the hardest one to get loose for some reason. The mount under the A post and B post, I took those bolts completely out since that is where these new parts need to be swapped out. The C post mount I just loosened. Using a floor jack and a 2x4, I jacked the cab up placing the jack right at the pinch weld area between the A and B post area. Initially, the whole truck, cab and bed, were raising, but it then separated and just the cab began to raise. You only need to raise it enough to slide the top isolator from the "A" post mount out. Once you swap out that top isolator, you can lower the cab back down since the bottom pieces just attach from the bottom side.
As you can see from the photos, the "old" top piece, there was no rubber on the left and right side of that metal centerpiece. The new updated part number now has rubber completely surrounding the metal piece which is where I believe the clunk noise was being produced from. The lower absorber parts, you can see the difference in the height of the rubber section. The old parts had a decent-sized gap between the rubber and where it met the metal of the mount on the truck. The new parts eliminate that void space, removing any additional movement.
Here are the updated part numbers -
68589984AA - Bottom absorbers (x4)
68487213AB - Upper Body Hold Down Cushion (x2)
Let me know if you have any questions - hopefully, this will be the fix for those of you who also have been unsuccessful at solving the clunk. I also think this solved my mystery vibration I get at random speeds and confirmed it was not my wheels and tires.
