if you have the money to upgrade the tranny then it wouldnt hurt you at all, for later projects such as power adders you will probably want to beef your driveline up. My stock t-5 lasted only about 10k with my crate motor rated at 345 @ the flywheel. keep in mind though it had already had 135k on it but i think the added Hp and Tq just was enough to warrant me getting a T-56. I deiced on beefing up my driveline more before i addded anything else, suspension, tranny, clutch etc etc, just for the added protection down the road. good luck :thumb: