Large vibrations at high speed and on decel. Rear end is clicking.

[88 Fox GT]

My car has had a little vibration on decel for a while now, but nothing major. Today, I got it up to about 90-100ish and it vibrates so horribly that I have to back off for fear of something breaking. It's not vibrating horribly on the decel too. So, as I'm pulling it into the garage slowly, I hear the rear end going click-click-click. I put it up on jack stands and turned the wheels and am getting a nice click-click-click from the rear end. What the hell is wrong? This is my daily driver, so I need to get it fixed.

 

[fidstang]

Well this sounds fimilar. Bearings are going bad time for a rebuild!

 

[DouglasOhio]

feel for play in the tailshaft of the tranny, you can tell by wiggling the driveshaft where it goes into the trans this was my bad vibe...

 

[88 Fox GT]

Well, it looks like a freaked out a little too early. I inspected it a little closer and it turns out all of the bolts holding the driveshaft to the rear yolk were loose! Two were about to fall out. Whoever installed the new u-joints before I bought it must have forgot to tighten the bolts. Good thing they never fell out. I tightened them up and the vibration is gone. Thanks for the help though.

BTW, anyone know the torque specs for these bolts?

 

[7-UP BILL]

remove the bolts and put loc-tite on them. If not they'll just get loose again. I use loc-tite "red".

 

[onefstsnake]

if you have the $$ Id highly recomend an Aluminum Driveshaft if you still have some vibration.

I had alot of vibration around 65-100 and the aluminum driveshaft made it smooth as butter.
Just my $0.02

 

[87Mustang351]

yea i had to lock tight my bolts to i used the red as well..