Baaaaad Vibbbbrations !!

75 CJ5 w/258

Recently started experiencing pretty serious vibration between 30-40
mph......seems to be coming primarily from right front area.

Checked all the tire pressures and lugnuts, then had the tires rotated
and balanced.

Realized today that the vibration occurs when the engine is under load and supplying power to the drivetrain. Shift to neutral or coast down a hill and the vibration pretty much disappears.

Any suggestions as to the fix ?

Thanks !!

 

check your U-joints?

 

Motor mounts?

 

I have a similar problem right now. I can run about 60-65 and the vibe goes away, but then drop to 40-45 and there it is.

I was wondering if it was the pinion bearings in the rear.
I feel your pain......literally!!

 

x2
check them

 

Just a follow-up.....

Two bad U-joints accounted for the majority of the vibration, and a missing bolt in the transmission mount didn't help matters. Replaced the two with new universals with zerk fittings so these should last a long while. Thanks for everyones input...........