Yeah, i've seen posts where someone was talking about a Harley/F150 Diff rear-end and someone else said --- got a PROBLEM THEN GO AHEAD and get a TT .........dah!!

And I was wondering what they were referring to. !!

 

had to have the clutch pak replaced at 50000 miles on my 04 if this is a common problem why has it not been recalled

 

It's not a safety issue.

 

Way back in 05 when I had a driveline vibration at 63 MPH one of the TSB fixes they performed was new clutch packs and a fluid/friction modifier change in the rear end. They ended up changing the drive shaft as well.

 

ok so is the best way to fix the shudder just to replace the lubricant in the rear end?

 

It's a case of trying the cheapest fix first. Back in '04, Ford filled the diffs with 75w90 oil. That worked fine for the open diffs but it caused a low speed shudder when turning from a stop with the limited slip diff. The fix under warranty was a new clutch pack and switching to 75w140 oil.

 

Has anyone replaced the diff-case clutch disks paks them selfs ?

If so, what (if any) tools were needed, Ford special tools-- etc?

 

Unless you really know your way around a differential it's just not worth doing yourself. Find a good driveline shop and pay them to do the work.

 

Last diff i set up was 15 yrs ago and it wasn't a positive traction, hence trying to find someone that has.

Reference Our (volume 1) F150 Ford shop manual page 205-02S-48 ..........

 

Can I assume that "No one" have ever rebuilt the positive traction unit.... them selves?

 

I had this problem, and they diagnosed it as clutch packs. They added the lube, but it that fails, I'm going to follow the advice on the web and install a Detroit Trac instead of the Ford OEM.