i had the same problem...for me it was a loose driveshaft...my drive shaft would vibrate more noticable when i would shift from 1st to second..

 

well i would think that when i had the u-joint replaced, that would have been noticed and fixed...

 

there is more than 1 u-joint...check the old one. and also check the runout on the driveshaft, you never know. did any balance weights fall off ofthe driveshaft?

 

i had the one u-joint replaced at a local shop by guys who have been very good to me in the past. He said the other u-joint was fine. I would assume he would have checked everything else out too. When I told him the shake was still happening he told me to come pick him up and take him for a drive so he can try and figure it out. I was hoping to fix it myself though...

 

The shake can be from the driveshaft being out of phase. Meaning it wasnt installed in the same position it was removed. Also, the driveshaft could have loosend up if he didnt loctite it when re-installing.
-P.

 

well this was the first time the driveshaft had been removed, and it was happening before this....so i dont think it's from re-installing. easy way to fix the driveshaft? or shouldi just take it in...

thanks for all the help.

 

id take it back in.

 

well i took the guy for a drive and he said he thinks its ignition. i replaced the plug wires (didnt get plugs like an idiot) and that didnt fix it. to me i just doesnt seem like its coming from the engine...UGH!