I have gone through 4 stock transmission mounts and one poly mount. Why do they keep breaking. Also when i had the poly mount the car would vibrate at 50 to about 100miles and hour dont know why. I just keep snapping stock mounts and on the poly i broke the bolt in half dont know how that happened either. Any ideas why they keep breaking.

 

The poly mount will make the interior rattle/shake a little more because rubber helps absorb that stuff better. Are you beating the hell outta the car? That can make em break pretty fast.

 

I broke 2 stock ones within 3 months time period. Went to a poly, got too many vibrations and replaced it with a 1LE and it's been good for 5 months now.

 

whats the difference between the 1le and stock and where can you get them at my poly mount made to much vibration.

 

Get your driveshaft balanced.

 

I broke my stock one, and now I have a poly one that I got from www.thunderacing.com It does vibrate a little more, but it has held up great so far.