Mustang Boards - Upshift Clunk

I have a cherry black ’99 Cobra with only 45k miles on it and I love this car (tho I may sell it and get a Harley).

However, I have this clunk that is driving my nutz. And it’s not the same “Cobra Clunk” described hear in another thread.

When I got the car back in June of ’05, I thought the clunk was my shifting technique as it had been many years since I had driven a stick (other than my old Harley). But, as time has gone by, it has become more pronounced and it is certainly not my driving technique.

Here’s what happens:

When shifting from 1st to 2nd I get a clunk from the rear of the car as if there is slack in the drive line. I can sometimes avoid it by really gently feathering the clutch, but that’s really hard to do.

I get the same thing from 2nd to 3rd. Same thing if I try to feather the clutch.

It’s the same thing all the way up thru 5th. But it is less pronounced as I go thru each higher gear and feathering is easier/more effective thru the higher gears. But the toe work is still difficult.

Oddly, as you back off the throttle, there does not seem to be any drive line slack.

I had a rear wheel bearing go out and had it fixed at a “responsible and respected” local drive line shop. They said my clunk could be easily fixed ($80) and showed me some pretty good drive line play (half to one inch) between the rear of the drive shaft and the front of the diff. They said I need to go to Ford and get a “Rear Diff Housing Bushing”.

Looking at the Service Manual CD I can’t find such a part.

I thought I’d get some feedback here. As good as the drive line shop is, they are still not Stang gurooz.

Any help would be appreciated.