heres a cut and paste of my old gear ratios thread... ok so i did some math, using this formula for top speed. and using the numbers provided be willie and dave, rpm x 12.5 -------------- 168 x R rpm i set at 6000, 12.5 is the rolling radius of a loaded driving tire, 168 is a constent factor, and R is your gear ratio. so you times final drive by overdrive and plug that number in as the gear ratio so plugged in; fe trannie. 4.18 x .82 6000 x 12.5 =75000. -------------- 168 x 3.4276 =575.8368 = 75000 ------- 575.8368 = 130.24 mph@ 6000 rpm, 130.24 x 1.61 =209.69 km/h ge trannie, 3.74 x .82 6000 x 12.5 = 75000 ----------------------- 168 x 3.0668 = 515.224 = 75000 -------- 515.224 = 145.5677531mph @ 6000rpm 145.5677531 x 1.61 = 234.3640824 km/h at trannie, 4.29 .73 6000 x 12.5 = 75000 --------------- 168 x 3.1317 = 526.1256 = 75000 ------- 526.1256 = 142.5515124 x 1.61 = 229.507935 km/h @ 6000 rpm just for mafix, mr2 n/a 4.176 x .82 6000 x 12.5 = 75000 -------------- 168 x 3.42432= 575.285576 = 75000 ------- 130.3700338 = 130.3700338 x 1.61 = 209.8957545km/h mr2 t 4.29 x .73 6000 x 12.5 = 75000 --------------- 168 x 3.1317 = 526.1256 = 75000 ------- 526.1256 = 142.5515124 mph, x 1.61 = 229.507935 km/h by my calcs the winner is the gts s-53 trannie,\ thanks for the numbers team GT2---