I changed the pinion bearing and race in my 94 Ram 1500. The race and all the rollers were pitted and was causing a rumbling sound. I did it in my garage on jack stands. The only hard part was crushing the new crush sleeve. I finally just put the old one back in and ran it. It was still working fine 70,000 miles later when a tree fell on it and destroyed the truck. I think the cost was less than 50 bucks or so, but it's been a while.
My friend recently acquired this Ram 1500 with a similar rumbling sound. The previous owner thinks it's the pinion bearing. Got to finish installing the rotors and
method wheels on the Silverado this week before we can take the Ram in. We'll see.
