Clunking noise and sensation from a standing start

I had a '95. There was a bulletin where you had to pull the rear driveshaft apart, at the slip yoke, grease the crap out of the splines, then put it back together. I also drilled, tapped, and installed a zerk fitting in mine for grease later.

This fixed the clunking problem.

Spdloader

"Jeff Strickland" wrote: '95 Bronco 5.8L, Eddie Bauer

Makes 3 noticeable clunks go I had a '95. There was a bulletin where you had to pull the rear driveshaft apart at the slip yoke, grease the crap out of the splines, then put it back together. I also drilled, tapped, and installed a zerk fitting for grease later. This fixed the clunking problem. _______________________________________________

That's what is so great about this newsgroup - someone who has solved the same problem will give a tip that might avoid days of aggravation looking for the cause, and save hundreds (or thousands) of dollars in shop labor.

Best regards to all ATFers.

Rodan.

Really? The driveshaft is the source?

That sucks, I just had it out for a new set of u-joints ...

The slip yoke was the source. Spdloader

Hope it helps someone!

Spdloader

The drive shaft slip yoke can indeed be the source. Sometimes, the yoke has to be replaced to correct the problem if it has worn because of the inadequate lube. Another source of clunk in the old Broncos is the front axle strut bushings. If you replace them, the urathane ones are a great improvement over the OEM or rubber ones. Beware the urathane bushings will transmit slightly more road noises and road feel. IMHO, the Bronco drives better with the urathane bushings by helping cut down on the road wander a bit.

Lugnut

My '02 F250 does this too, since new, I just haven't gotten around to taking the shaft apart.

Slip yoke? Do you mean slip joint? The 'shaft is a 2-piece shaft, correct?

Probably the wrong terminology on my part, but take the shaft apart and grease the splines.

Also, lugnuts suggestion about the radius arm bushings is another common source of "clunk".

Spdloader

has anyone thought of checking the pinion nut? sometimes it will back off a little and cause a clunk and some vibration too. Hope this helps.

Guys, I worked at the FORD technical service hotline over the summer, and they are still seeing many problems with slip yoke (yes I mean slip yoke, same thing as a slip joint just different terminology for different people) and all they required was grease.. Some however did require running through the driveshaft angles and making sure all the working angles were within .5deg-3.5deg. Hope this sheds a bit more light on the subject.

Ford Tech