Very Bad Vibration

[mark4g63t]

All the motor mounts are from before the swap and looked good when I cleaned them up. I will check in the morning to make sure they are all tight but i'm almost positive they are.

[s1ngletracker]

just grab the engine or use a lever and see how much you can move it. Hard to tell what the issue is from there, but if your T-case is tight to the trans, trans tight to the engine, and you see it move in the video, then the whole assy is probably moving.

[mark4g63t]

Rear hanger. Pass. side is off a little bit.

[mark4g63t]

Well fixed the hanger, problem still happens. No idea what to try next besides new driveshaft.

[mark4g63t]

Could anything in the t-case or tranny cause this vibration? Really need it fixed or i'm going back to fwd for a while.

[dsmreck]

I feel like if you believe every mount is perfect and every bolt tight it's time to take things apart

[mark4g63t]

I've double and triple checked. Everything is tight. Only things it could be would be driveshaft which looks to be ok, trans or t-case.
What in the trans or t-case would cause that tho?

Vibration only happens under acceleration but, not just wot. Normal driving around too.
Vibration gets more intense with RPMs/ speed
Vibration goes away as soon as I let off the gas and coast or if I push in the clutch it will also go away.
Can rev it and no noises are heard and nothing is felt.
With all 4 wheels off the ground and tires off and rotors bolted to hubs it still vibrates.
Can feel it in the steering wheel as well as in the butt seat.

[mark4g63t]

https://www.youtube.com/watch?v=IhLNqJfCqIw&feature=youtu.be

[evotuner]

If it stops once you let off throttle, that would make me think transmission. I mean if you're still coasting at 55mph your t case is still working so that would eliminate it I would think. Unless I'm high.

[dsmghost]

I've double and triple checked. Everything is tight. Only things it could be would be driveshaft which looks to be ok, trans or t-case.
What in the trans or t-case would cause that tho?

Vibration only happens under acceleration but, not just wot. Normal driving around too.
Vibration gets more intense with RPMs/ speed
Vibration goes away as soon as I let off the gas and coast or if I push in the clutch it will also go away.
Can rev it and no noises are heard and nothing is felt.
With all 4 wheels off the ground and tires off and rotors bolted to hubs it still vibrates.

Sounds like in your trans to me.