mustang_montana

5speed, the t56 is a 6speed though. you can get a full conversion set for the t56 for around 2500$, includes everything you'll need for the swap. they got the viper spec version of it too for a little over 3 grand. im just gonna go with the tk0600, just gonna beat the living **** out of my t45 untill then.

SOHCtimes2

You should check out ModularMustangRacing. They have a tranny kit where they take a TKO500 and tweak somethings in it to make it stronger and such, they recommend it for applications up to 750HP. Its probably what I'll get when I manage to destroy my T45.

"MMR Pro Trans 750
This is our entry level Transmission Derived from the NEW TREMEC TKO 500. Our Pro Trans 750 includes a 26 spline input and 31 spline output shaft at no extra charge, next, 1st, 2nd & 3rd gear along with the cluster gear is then ultrasonically deburred to improve shifting, minimize noise and increase efficiency which means less drive train power loss than a stock transmission. These same parts then receive a heat tempering that dramatically increases strength. The transmission is then re-sealed, serial numbered and shipped to the customer. Each transmission even includes a billet aluminum shifter (handle not included) This transmission is rated by MMR up to 750HP and vehicles running 10.00/138 and slower. Gear ratio’s are 1st- 3.27 2nd- 1.98 3rd- 1.34 4th- 1.00 5th- .68 ."