Deceleration Vibration

Are your wheels torqued down to spec? Loose lug nuts can cause shudder on deceleration.

Pinion angle was also my thought as well. Everything torqued down properly after lift and tcase drop install? Recheck after 500 miles?
 
Are your wheels torqued down to spec? Loose lug nuts can cause shudder on deceleration.

Pinion angle was also my thought as well. Everything torqued down properly after lift and tcase drop install? Recheck after 500 miles?

Lugs are torqued at 100 ft pounds. Double checked for loose suspension items and everything looks good, plus the lift had no effect on the shudder.

Could it be a bad transmission mount?