Rear End Vibration
I'm the new kid on the block.
I have a 1997 E-350 Superwagon, one of the first V-10's built. It has had numerous issues but has amazingly made it to 135,000 miles.
At 18000 miles the rear end went out (bearings I believe) and the pinion bearings recently went out again. The dealer said because the nut had worked loose and the slop that created tore up the bearing. That has been fixed ($795).
Now I get a signficant vibration ONLY WHEN THE VAN IS COASTING OR ENGINE BRAKING. It is most notable when I crest a hill with the cruise on. At that time there is a distinctive power-train shudder until the engine powers the vehicle. It feels like it's coming from the rear. I can similate the vibration manually by backing off on the accelerator.
I just downloaded ALLDATA TSBs, listing 122 through July, 2003. I see several of the other issues I've had (never corrected), but nothing about a specific rear end vibration.
It's time for an oil change so I'd like to address this at the same time.