[The Dreamer]

I wouldn't write-off the TKO-600s until you get some more info. I asked, but the poster never said whether he was talking about TKO-500s or 600s. The earlier TKOs were rated at a maximum of around 400-450 ft-lb (I forget the exact number). Cobra owners relied on the fact that the trans was designed for a 3000 lb car for it to survive behind some of the big HP engines. The TKO-500 and 600 are supposed to be rated at 500 ft-lb and 600 ft-lb respectively. If the failures were earlier TKOs, then that is understandable and you would not be getting one of those because they are not available new anymore. If the failures were 500s or 600s, then there may be a design problem with the new trans. The nice thing about the new 500s or 600s, besides the improved load rating, is the ratios will work well with even the SPF 3.73 rear.

Oh, I put the Velasco in mine for the same reason as Jamo. I already had a lot in the engine, the difference wasn't a lot compared to the total. Of course, you can nickle and dime yourself into a really big "a lot".