Vibration/Rumbling of drivetrain while clutch is engaged

check engine mounts and trans mounts they may be broken also make sure your belts are tight as they can cause vibrations as well.

Mounts and belts are good. Could it be an input shaft bearing or pilot bearing? There is no shudder when reving in neutral. When i press the clutch at any speed the shudder stops. The shudder returns when I let the clutch out.

tehn check your trans to see if there is any fluid in it if there is it's probably the trans or tcase bearings making it.

HOW DID YOU CHECK THE "U-JOINTS"????

DO YOU STILL HAVE THE STOCK 2 PIECE AXLES?

MAYBE LOOK THESE OVER?

https://www.2carpros.com/questions/jeep-cj7-1985-jeep-cj7-rear-diffential

JUNE 27, IN THIS ONE

https://www.2carpros.com/questions/1985-jeep-cj7-inconsistent-curb-idle-low-power-hi-rpms/page/5

KEEP US POSTED

THE MEDIC

WELL......ARE YOU ON TO ANYTHING YET?

ANY ANSWERS TO OUR QUESTIONS?

ELABORATE ANY MORE?

WE GOT MORE SUGGESTIONS

THE MEDIC

Hi Everyone, sorry for the late reply. the project got put on hold for a bit. To answer your questions:

I checked the u joints in the drive shaft to make sure the vibration wasn't caused by a worn or loose joint. I did this by putting the jeep in neutral and trying to move the shaft side to side to see if it had play in the joint.

My rear axles have been recently upgraded to one piece axles.

I checked the trans fluid, it was slightly under, I'm thinking this may have something to do with it and that the damage is to the bearings inside the transmission.

I'm moving next week and I will have a proper garage where I can drop the transmission and take a look. Any further input is always appreciated. Otherwise, standby till we drop the transmission. Thanks!

if you see rust around the seals on theujoints they are probably bad as they have run out of grease, but I kind of think it's thetrans giving you the problem.

THIS IS HOW TO CHECK YOUR U-JOINTS

SEE 1ST 2 MY PICS....I NEED TO RE-MAKE THEM, THEY ARE HARD TO READ

LOOK AT MR. HARMONIC BALANCER---HE IS 2 RINGS WITH RUBBER SANDWICHED IN THE MIDDLE, SOMETIMES THE OUTER RING STARTS "WALKING OFF" THE INNER RING WHEN THE RUBBER GETS OLD......FINALLY, IT WILL COME ALL OF THE WAY OFF. YOU CAN SEE THE RUBBER ON MINE (PAINTED) WHEN I WAS INSTALLING A REPAIR SLEEVE ON THE SEAL SURFACE....SEE PIC 3

THERE IS A PULLEY BOLTED TO THE FRONT OF THE BALANCER.....DON'T MISTAKE IT FOR THE BALANCER....I TOOK 168 PICS THROUGHOUT THE INSTALL-AGE OF MY NEW TRU DOUBLE ROLLER TIMING CHAIN SET.....IN PIC 4 YOU WILL SEE THE PULLEY......PIC 6, THE PULLEY IS REMOVED LEAVING THE HARMONIC BALANCER (BEING PULLED)

KEEP US INFORMED

THE MEDIC