GregN,
According to
http://5speedtransmissions.com/tr-3550.html the TKO 500 and TKO 600 share the same case and dimensions as the 3550, TKO, and TKO II.
Hey guys, I have another question. I had my heart set on a TKO II with the .82 overdrive gear and something like 3.08 in the rear. Now that the 600 series is here and the 1st, 2nd, and 3rd gears are taller, I might have to rethink about the rear gear. Maybe 3.25 or 3.50 in the rear would be good. Of course, then I might consider the .64 OD gear for good highway crusing.
I have a spreadsheet that plugs and chugs these combos, but I'd like some experienced opinions on what effective ratio is good for launching on street tires. Also, what rpm is reasonable for highway cruising?
I'm so confused!
Tim