97 F150, 5.4, 4x4. 60K miles. I have a severe slip yoke problem. I have tried the grease, worked for 2 days. One mechanic I called told me there was a modified yoke with a teflon coating that would solve the problem ( TSB 97-13-21). Another told me there was an aluminum drive shaft that would work (although he said this was only a temporary fix). Though research, I found something that intrigued me. It is a slip yoke eliminator kit. Apparantly it is used quite regularly when a truck is lifted.
The process is done by bolting on a flange onto the end of the yoke. Replace the existing drive shaft with a new one that has the slip built in to it. The kit costs approximately $450, labor extra.
Has anyone tried this? Were there any problems?

-Scott

 

not sure, but will be interested in the replies....and BTW, sounds easy enough to do yourself!

 

The only big issue will be drilling through the end of the yoke. Which means I will have to heat the end of the yoke to take the temper out, not to mention drilling straight to keep proper balance.

 

ouch. do you have a website where to buy it?

 

This is the site I found.
http://driveshaftsuperstore.com/drive_shaft_SYE.htm

 

Interesting problem. I have a 98 that was heavily off-roaded. the yolk center was knocked out at some some and it ran open in for several years. (unknowingly) It has a 4 inch lift but I believe that is not a factor. The output shaft is severly worn. Tailcone removed the yolk had about .080 wobble in it. The bushing in the tailcone is a joke for alignment as well. I am lookin at changing out the output shaft, $220 for the part, or replacing the transfer case. (cheaper???) This solution might be an alternative. Drilling the shaft would be a nightmare. They don't list the BW4406, but state they do "ANY" transfer case. I went $320 into a driveshaft before I discovered the bad shaft.