9 yes's to Alloro , so far I added new tires, U joints, rear tranny mount and took it for a 20 mile drive, vibes still there ! after about 5 - 10 mile and between 40 - 70 mph and when coasting in nuetral ( revs @ idle), next I tried a dial indicator on all the wheels and drive shaft, 3 of the rims were out about .040" and 1 was .075" which translated to about .105" on the tire sidewall, so is this enough to make vibes ? took that wheel off and installed the spare ang got the same reading, hmmm ? Getting frustrating now, The tranny is a 3 speed w/ lockup, think we should try a fluid change next ? thanks, Tim

 

In the persuit of happiness I'm continuing the Ram Van vibration chase to victory , the driveshaft was out just under .030" which the local garage guy thought was excessive, took the driveshaft to the local driveshaft shop, they said it was wierd and trued / balanced it for $68.90, next test drive I put the lucky lady in the drivers seat and had her do 60 while I sat far aft, sure enough vibes still there and a bit more distinct in the rear as well as the rear itself singing. got to thinking about that right rear tire being out of wack sideways @ .105" , so I pulled the wheel and measured axle hub flange circumference, seems to this ameture this measurment should be close to 0", well after several turns I got a constant "out of wack" of .020", now the question is is that 7" diameter flange being out .020" going to cause a 27" diameter tire to hop (vibrate) at higher speeds and even more so as the tire heats up ?????????

 

Looking like you got a bent axleshaft.

If the axle is noisy too(singing) that could be bearing, or the ring and pinion.

If you got 10 diff cover bolts you have an 8 3/8 axle commonly called an 8.25.

If you have 12 bolts, it is the 9.25 axle.

Remove the cover and inspect the fluid, and magnet, and gears. Look for pitting on the spider gears. You can pull the c clips and remove the axle shafts and inspect the surface where the bearing rides.

My 8.25 lasted ~192 k miles. I got a junkyard 9.25 and had to have it straightened and new bearings installed.

I would think the vibration would happen at any temperature and right from the start, but stranger things have happened

 

I'm inclined to say no. That .020 is way too small of a value to be noticed. Did you happen to check the other side as well for comparison purposes.

 

I have a similar issue, did you ever find the problem?
thanks