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

oops I put 200 rpm not 2000 by accident srry thnks

 

no one I ve searched everywhere. please help

 

could be your harmonic balancer on the front, possibly the flexplate i would think too, i installed a new flywheel from GM on my car (5 Speed) and i have a vibration at 2300 rpms.

 

ok but does it only between those rpm ranges?? thnks

 

mine does the same thing. right at 2000. i also notice a loss of power between 2000-2500 that kind also freeks me out .. seems that i have seen thsi before a couple times on this board.. never found a solution

 

Gee thats comforting!~ but thnks for the input Vader? or Fivestar? u 2 seem to b the most knowledgeble here. any sugestions? thnks

 

one more time anyone? thnks

 

Does it do it if you rev the engine in neutral?

 

yes I just tried it

 

I think its my flexplate this sucks the big peepee