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Thank you for sharing those results. Sadly, much of my driving is at 70 mph which is peak vibration.

6 No worries. I appreciate the reply though. Looks like we are all in it together

After my next dig into the truck and If I can't find a specific spot then I'll try the Centramatic.

I still believe it's a lack of precision parts and quality control. As I mentioned in the previous post the axles, rotors, hubs, and wheels and tires have been replaced. When I checked them with a micrometer they were all out of factory spec except the wheels. The ride did improve. I plan on...

I'll be curious to find out your results. Please post when you get them.

I haven't checked the drive shaft yet since the vibration analyzer was pointing to other things. But we are running out of things to check without digging into the transmission itself. I was hoping to hear someone come forward with their issue since i drove two new ones off the lot that did the same...

You are correct about the 3.42 rear end gear ratio and the 12 hz at 1800 rpm. The tires that came stock are Firestone Transforce AT 285/60/20. The dealer I purchased the truck from in North Carolina paid Firestone to put on new Michelin Defenders on the original wheels which, also, did not meet...

I knew it wasn't the tires the moment we rotated the rears to front and vice versa. The second dealership said the tires have to meet roadforce first. I have had a total of 19 new tires installed by Firestone and according to the third dealership, none have met roadforce. The last set was...

I think it is getting close. I was hoping not to go there.

Thank you for the reply. I wish I could say the same. I have a one piece shaft from the transfer case to the rear differential. We put a vibration analyzer in different locations on the truck. The left rear makes the most vibration. It comes out at 12 HZ at 1800 rpm which translates to a bump...

My theory is Ram may have a bad batch of parts. The reason I say this is I put the truck on jack stands and ran it up to 70 mph (make sure to turn off traction control) and the left rear tire has some run out side to side and up and down. The right rear looked pretty good. I then took the rear...

I live in Florida and I purchased a new Ram 2500 4x4 Laramie Crew Cab Diesel w G56 transmission out of town. The vibration starts around 65-70 mph and felt in the seat and floor. The Three local Dealerships say its the tires. After 19 tires from Firestone (Ram doesn't warranty tires) I drive 11 hours...