Originally Posted By furious70
Originally Posted By 69Mcode440
Check the rear bushing in the transmission.
Mike

Can I do that with it in the car?


If you have the vibration sitting still it is not in the driveline. It only seems worse in drive because of the load it's under.

"Follow me the wise man said, but he walked behind"


'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost conversion.
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.