I ordered innovative mounts online and I just received them I asked for 85a grey but the tranny mount came with a black bushing I'm assuming is 75a wondering if the different rates would negatively affect me I'd rather not have to deal with shipping them back and waiting. Thanks for any input

 

If you're building a turbo build with 700+hp, then you should be worried about lower rating bushings. If not, I wouldn't worry too much.

 

Mixing durometers on drivetrain mounts is a big no-no, and can cause failure.