New transmission mount now bad vibration in drive at full stop only
You might need to replace the motor mounts too. Have them looked at. You strengthened up the transmission and if the engine mounts were suspect, you will notice it more.
Changed them first . No vib week later check trans mount found it bad replaced. Now bad vibration in drive at full stop only.
Bad U-joints in the drive shaft.
Only vibrates at full stop in drive. No vib when truck is moving
I would loosen all the mounts you just replaced and try resetting them, it is possible that one is just slightly out of line.
I'm thinking a tune-up would help if all the mounts are good.
Tune up is 5000 miles not old. Removed new trans mount replaced with old broken one (only broke half way ) just to see. The vib went away don't understand how a new mount could vibrate your teeth out and a old broken one run good. I read one post that said the new mounts are made with such hard rubber or material that it is like having straight steel no insulating qualities at all
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