Hi. I have 2 questions here. (1) I replaced my center bearing with an anchor brand bearing. I made sure to align the shafts to their original spots. I checked and regreased u- joints. Now it vibrates. I put 2 washers on each side of the center bearing thinking that maybe the aftermarket bearing might not sit in the same place and it did help a little. Anyone else have any issues with theses? I have read a lot about the two piece drive shaft issues so that brings me to the second (2) question. I have read of switching to the one piece drive shaft and seen some clearance issues. It's a extended cab 2wd mt trans. Can you run them without hacking and pounding the floor of the cab and hacking out the cross member? Thanks Guys!

 

I had the drive shaft do far into the tranny. I didn't realize the rear shaft extended also.

 

Are you saying that you slid the bearing back which pulled the shaft a little more out of the tranny and that stopped the vibration? Is that it? How much did you move it back?

 

Yeah. Slid it back about a quarter inch and it seemed to help. I also added a thicker washer to it to alien it better.

 

Thanks. I plan on trying your idea. I know that the bearing base has plenty of room to slide around. Unfortunately when I started this project, I didn't know that the placement of this bearing was so critical. I will move it back a little tonight and see what that does. I also still have the original bearing so I plan on measuring the height from the base to the shaft centerline, if there is a difference, I will shim up as you did.


It baffles me that such a large company like FORD that makes so many popular trucks would make a system that is so simple, so prone to mis-adjustment.

 

Mine measured the same to the center of both bearings. Still had to shim it a little. Weird thing is that if I got it straight with the tranny out put shaft it made it worse. Must have taken the rear half out of the 3 deg range.