I've been thinking about upgrading my TKO600 as well, not so much for shift quality as strength. Both American Powertrain and Modular Mustang Racing sell a box they call good for ~900 hp, but from what I can tell besides some similar mods to what liberty is doing they are mostly just cryo and rem finishing the gears and claiming that strength upgrade. I also recently called LIberty, and the guy there said that cryo/rem is good for maybe an extra 100 hp ? but that there is no standard for "rating" a transmission by hp or lb/ft level (obviously you would need to know the weight and gearing and tire of the car to even begin to make this claim). So anyway I've been considering that since I have broken the 3rd gear cluster before.
But one thing I don't hear anyone mention about the TKO is the damn noise. My box sounds like a coffe can full of rocks anytime you "lug" it below 2500 rpms, which if you think about it, is like 50% of your street driving. Its very annoying. And every tremec I've had has done this behind multiple engines, some worse than others. Even though I could have LIberty or someone else upgrade this tko, I've been thinking very seriuosly about dropping the big bucks on a T56 magnum even though I have no use for the extra weight or gear. But I just feel like the T56 is a much more OEM style transmission with bigger and better designed internals.
Just curious if anyone else complains about the noise their tko makes ?
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