Try this. Your SC probably needs them anyways.

 

I assume you have already done a tranny fluid flush along with a new tranny filter? Always a good idea since you have no idea since it was last done. While you're at it, make sure you change out your diff fluid as well. I am a big fan of Redline products, awesome stuff. I am always amazed how few people actually maintain these systems. (Along with power steering fluid flushes as well!) While you have the car jacked up you should go ahead and check you transmission mounts along with the condition of the guibo rubber joint at the end of the drive shaft by the differential. Keep us posted on your progress and solution.