Whine From Drivetrain After Aluminum Driveshaft Install

[Scott7512]

Just installed a ford racing aluminum driveshaft a few days ago. I have driven it twice for about 5 miles each trip and after about three miles there is a whine that starts from what sounds like the transmission. I haven't pushed it because I don't want to get stranded. The u joints are sealed. the Trans did leak a little fluid but I filled it back up. Do I have to break it in?

 

[Scott7512]

Just turned the driveshaft 180 and tested it again and no change. About 3 miles in the whine starts. Clutch in its there. Directly related to speed.

 

[stykthyn]

That's an odd duck. My first thought would be it's picking up something in the rear end.

 

[Noobz347]

My first thought would be to check each of the brand new U joints and figure out which one is being the pain in the ass.

 

[mikestang63]

check the weights on the driveshaft. Also, is yours and AOD or stick. Although you can use the stick yoke that comes with the FRPP driveshaft on an AOD, the factory one comes with a dampener.

 

[Scott7512]

Drove it again and after I got back, I was looking around and noticed that the yoke was pretty hot. The old one shows wear. I think it has something to do with the new yoke and the old bearing in the tail shaft. Do you think it will go away after the new yoke seats to the bearing?

 

[Scott7512]

The part number on the new shaft is
M-4602-G
I have a five speed Trans t5

 

[mikestang63]

your tailshaft bushing may be worn... can you wiggle the yoke?

 

[Scott7512]

Ok, I watched a video on changing the rear seal and the guy said to put bearing grease on the yoke so I took the shaft out and greased the yoke. I also noticed that the seal was one with the dust cover and the shoulder of the yoke had it pushed in. I cut the dust cover off and put the greased shaft back in. Took it on the same 5 mile trip and had no noise. Maybe the rubber boot rubbing against the yoke or because I did not grease the yoke caused the whining sound after warming up. Here is a recording.

 

[Scott7512]

I don't guess that recording got posted. Sorry


 

[a91what]

I would just replace the bearing and seal in the tail shaft. No sense in putting a bandaid over it the root problem is still there.

Better safe than sorry IMO.

 

[Scott7512]

There is very little play and I am not loosing any fluid.