Engine/Transmission (1994 - 1998) engine/transmission imbalance????

[Hootguy]

Well. in my continuous search fro problems with vibrations i now find myself looking for another one,,,my rolling vibrations are still a mystery,,,but NOW,,i notice when in park,,and i rev up the engine ,,at about 1250 rpm it starts to vibrate and shake inside the cab,,,and seems to keep going like this up until 1800,,,anyone have any ideas ???,,,front engine damper??? anything in the transmission that could go unbalanced enough to cause this??,,,torque converter maybe????,,it's a DTT,,,and had been problem free for 10 years,,,anything in there that could wear to cause an unbalanced condition,,,,hopefully someone on here will have had something like this happen in the past and might have ideas...

 

[Missouri Mule]

The damper should have signs of wear (as in comming apart). Have you checked motor mounts?

 

[Hootguy]

motor mounts look good,,,engine doesnt even seem to shake much when at the rpm i get the vibration from,,,could a cracked flywheel or a out of balance torque be a [possibility??

 

[Dieseldemon]

My guess would be torque conv. the rolling vib I had one that turned out to be the center ujoint stiff from no grease you can only check it with the back joint loose.

 

[Hootguy]

i all ready had the complete driveshaft off and checked at the driveline shop for balance and good u-joints and hanger bearing... so those are out. . still looking,,,might be time to get a new truck,,,LOL

 

[JMcCoy]

Probably your damper. It's possible the flex plate is loosening up; you don't have a flywheel. Unless it was recently installed, I doubt it is loosening up now. Your rolling vibration may be caused by your u-joints in the steering knuckle. They are often overlooked. A valve adjustment my not hurt either. Good luck and keep us posted.