on a friday i blew my rear end at the track like every cobra does (04 cobra) so i took it to a dealer.they replaced the differential and the driveshaft and all hardware and bushings.i test drove the car and it was vibrating like crazy, i took it back and they found the flange that connects to the driveshaft was warped.then i test drove the car again and it was good so i took the car home and on the freeway always after 60 mph the car has a little vibration so i took back and the dealer said that was normal speed vibration,but i sensed it was never there before.but wasnt sure,so i took the car with me....yesterday i got up to 4th gear at full throttle and when i wanted to switch gears to 5th the vibration was so crazy i was unable to put 5th in...so i definetly dont think its normal....we changed the driveshaft and differential so what can this be?any help is apreciated...thank you(stories of your car's vibration also welcome)

 

how did you blow your rear end. Launching it?? I have an 04 cobra and i difinately don't won't that happening.

 

yes...launching...at the track. our cars have irs rear end and it has no support in the front of differential so when you floor it off the whole the car tends to wheel hop.so when that happens let off the gas quick...i didnt know that so i floored it even more to try and break traction to stop the wheel hop but the car started jumping severly and the next thin i know it im stoping half way on the track.i say all cobras do that..because i know three other cobras that have done it and also many stories so dont let the wheel hop staY

 

do you know what wheel hop is?

 

oh yeah i know what wheel hop is. I've heard the way to go is to get a solid axle from a gt. So pretty much everyones telling me just to get rid of the irs not build it up.

 

Still sounds like you have a driveshaft issue.