I own a 1988 convertable with no major mods. When I'm driving it regularly (shifting at around 2500-3000) nothing is wrong but when I try to push it and/or red line it the shifter vibrates very hard and the car seems to do it a little bit. And I was wondering if it's my motor mounts thanks in advanced for your replys

 

check your drive shaft. its not your motor it could be tranny mounts or your rearend.

 

how many miles are on the car?? motor mounts could be or tranny mount. but if i were you i would jack up the car and remove the flange off of the rear diff for the drive shaft and check the u-joints in the drve line. the only shitty part is that the u-joints are non replacable so you have to either get a use drive shaft or do like i did and get the one from like mazda trix that has replacable u-joints so i don thave to worry about it again. but that is def. where i would start.

 

there is about 120k on the car

 

When you pop the hood does the motor move around much at idle? Mine moved quite a bit because of my shot tranny mount.