Alright my truck is vibrating again. At nearly every speed. Happened after retorquing some loose control lower Bolts.

Other symptoms.

Lugs in overdrive sometime.
Sometimes a hard or loose shift, weird shifting.
Vibrates directly through the peddle. Not felt as much through steering wheel.

When driving at 60mph with foot on gas peddle. Tap the brake(not actually engaging brakes) while on gas and it surges about 400-500 rpm. Torque converter unlocking?

If you go from drive to neutral to drive while vibration occuring no change. But from neutral to drive the vibration goes away completlly during the shift.

I've been up and down chasing verything five time chasing this thing. Everything "seems" to check out. Now I'm thinking trans?

Truck will peel the wheels off and fly down the highway. not sure what to think really.

Rpm has no bearing on vibration. Just speed.

 

If it is speed related, don't think thats going to be a trans problem. Gotta be something AFTER the trans. (t-case, driveshafts, axles, or even tires.....)

 

Not The t case. I've had two differne toned in their and no change.

Could it be rear drive shaft? Why would it just now be getting worse?

 

Could be. Might be bent, out of balance, or, you may have a bearing going in the rear diff. Put it in neutral (block the wheels) and shake things around. See if anything moves, that shouldn't...

 

Is proper limited slip action for both wheels to spin in same direction?

Rear end is jacked up. Had helper in truck. Give light gas from 30-60 mph. vibration is felt and is somewhat strong. Does this lead more towards drive shaft in balance or rear wheel?

Uploading videos soon

 

Took tires off.

Repeated test.

Same symptoms. Just much more mild.