I've been reading posts since I got my Dak last May, but this is my first post. I get a brake shudder sometimes so I took my truck to the dealer and they said they couldn't find anything wrong and they checked for TSB's. I rotated my tires today and my axles are stamped Mxxxx, I read the TSB and it shows xxxxM as being the correct axles. I read another thread and one person said it that only the xxxxM stamped axles were the correct ones. Can anyone confirm or deny this?

 

I cannot confirm or deny whether or not the placement of the M in the sequence is important. But the TSB does show it as xxxxM. When I got the TSB done on my truck, one side was Mxxx, and the other side had no M at all. The axles are a probable cause of vibration, as are rear drums, unbalanced tires, worn shocks. All common problems.