Please first see

https://www.ford-trucks.com/forums/1...-the-caps.html

Now, to explain my current dilemma. Everything is back together and seemed to be fine. But, now when I accelerate hard I get a rear end whine.

Could this be caused by the caps being flipped, or possibly not shimmed correctly?

I looked up the symptoms in the Ford service manual, and it said that the drive shaft was put in 90 to 180 degrees off. Would that actually cause a whine?

Thanks in Advance

 

Sorry I can't advise you here, but I am just wondering how a drive shaft can be off by any degree at all. It's pretty straight forward in removing a drive shaft. There may be alignment marks for the spindle gears but that's about it. Or is it a balancing issue?

 

Some people swear that you have to put the driveshaft back in the same position as it was removed. If not, you can get a vibration problem. Personally I do not subscribe to that theory. I have never had an issue R&Ring a driveshaft then getting vibration issues. But then again I do mark the positioning before removing......

I do not see the reasoning why driveshaft positioning creating a whining problem. Which bearings did you replace? What did the wear pattern look like when you reassembled it? What backlash did you use?

 

That's what I thought too. I admit I have only had to remove a drive shaft twice- both times to replace U joints so in both cases I didn't have to remove the yoke from the differential, but I did from the transmissions. Didn't mark anything, didn't pay any attention to it at all [I can't remember for certain if the spindles had alignment grooves or not- I don't think they did], just removed, installed new u joints, and reinstalled the driveshaft. No issues in either case.