I posted this in gen tech but mabey someone here might know thnks

vibration at 2000-2500rpm
Well it didnt do it b4 the 350 went in. the vibration goes away after about 2500 rpm and it has me stumped fine at idel too. could it be the u joints or driveshaft? it has done it since the 350 wasx put in it didnt just happen. same trans I left the converter in the car whaen I did the swap so I know I didnt mess up the seals. there isnt any trans fluis leaking either. HELP ME thnks guys Kev

 

does this vibration occur in the same rpm range when different gears are selected.. if it doesnt then its not the driveshaft...

 

yes it does.

 

thats all my manual says about vibration at certain rpms

it said if the vibration occrus in different gears within the same rpm range then its not the driveshaft at fault...

 

ok cool thnks mabey I got a bad flexplate then. that sucks I dont want to take out the motor right now. I need it for work. till I buy a beater anyway. thnks again