[Ieatcamaros]

A pro shifted trans does not have synchronizers like a stock tranny. They use a locking dog ring which has more of a positive lock and way stronger than normal synchros. Most pro-shifted trannies have straight cut gears in them too. The stock tranny has helical gears (just like your distributor gear). Pro Motion makes a kit for the t-5 that has helical cut gears at like a 5 degree angle. They are almost straight so you get the strength and the class legality and they also don't make as much noise as the straight cut gears. If you've ever hear a gear drive, then this is what you transmission would sound like going down the road. Another big plus is that you don't have to use the clutch when shifting. And I have heard that you almost have to double clutch when down shifting.