MEM 302 5.0L

I changed the rear end in my Mustang and now I have a vibration in it at around 60 - 80 mph.
Does anybody know what that might be?

91mustang1979

You don't have the gears lined up right I would think. It may be that the pinion gear is to tight when it is to far away from the ring gear it will make a noise only on acceleration. When the pinion gear is set to deep into the ring gear it will make a noise on deceleration, so you may have to use some different shims on the pinion gear.

mnile9127

Sound like the drive shaft. check the bolts.

MEM 302 5.0L

i didnt mess with the inside of the rear end...and it doesnt do it at acceleration or deceleration..it just does it while im in between 60 mph and 80 mph......

mnile9127

I had the same problem. my driveshaft bolts came loose. I tightened them and applied medium strength lock tite. Problem fixed.

MEM 302 5.0L

any other ideas of what it might be??

Hawk

U Joint perhaps?

Twister

here is the list....
yoke has a groove in it
u-joints
bad bearing in the rear end
exhaust pipe hitting
pinion is not set to the right depth
bad pinion angle
driveshaft is loose
nut behind the steering wheel is loose

MEM 302 5.0L

ok thanks...ill check the easiest ones first...

ikeybmg

Once I swapped out my rear for another and I had this vibration at 50+ mph. It's your u joint bro. I never understood how, but It was. Change both U joints and youll have it fixed. And tighten the bolts just in case.