[Anthony]

Rebel 1,

I would never believe 100% what any manufacturer says about their product, they're trying to sell it to you. The TKO600 has slightly wider spaced gears than the wide ratio toploader, so to me it is still a wide ratio 4 speed with an over drive, although it has closer ratio's than the 3550 with the truck gear ratio spread.

I can tell you that on the track, my car with the toploader wide ratio gears may be a little too wide, and I'm considering either going to a close ratio toploader, or a true close ratio 5 speed, richmond, jerico, or G-force.

I wonder if the LeMans vipers (Archer's) or the Ron Fellow's C5 vettes run their standard gears as offered in the street cars, or they have custom gear ratio boxes. The street viper's T56 is a wide ratio 4 speed with a double overdrive, and I believe the street vette is the same.