Red-Rover wrote:
There was a problem on some 2002 F250's for sure and perhaps the 2001? that dealt with this very symptom. Some came from the factory with insufficient lube (grease) in the splined U joint yoke that extended into the transmition. The drive shaft slides on the spline during acceleration.
LOL I have to laugh... had early F-series with same issue, while under warranty, I would take it to dealership, they said same pumped a pile of grease into the rear of the tranny and say "all good.. enjoy". Well back a second time, then a third time and once more... they put some heavy duty axle grease in there (I should mention this was all within a 5 week period) again they said "all good.." well a week later, clunking was back, crawled under the truck saw all kinds of grease "sprayed" on the underside. I pulled the drive shaft and low n behold... I found the issue. Seized universal joint at the "spline end" reinstalled driveshaft and drove down the to "all good" guys, asked for the service manager and together we had the truck on the hoist and the drive shaft was pulled. Asked the mechanic and service manager to grab the spline end and see if they could rotate it on the drive shaft... Nope! I asked how it wasn't noticed when they pulled it to pump all that grease into the tranny... that splined end is gonna flop around like a limp... when you pull the drive shaft. I wouldn't make a big deal out of this but the truck was under warranty and after the second trip they started charging me for the labour and grease... in the end I did get credited back and the universal joint was replaced under warranty.
