kingvern
Well-Known Member
so I bought this 4 speed trans and I’m wondering what it came out of.
82nd 4 speed built that day..
71 A body 23 spline, should be 2.47 1st gear ratio.
Dan, what would be a good rear gear ratio for this trans and 340 B-1 headed engine with a comp cam 550 lift 306 duration. Mostly street with some racing.71 A body 23 spline, should be 2.47 1st gear ratio.
Close ratio 4-speed likes more gear in the back, but it also depends on the tire height and what RPM you can live with on the street. This is a good tool to play around with picking tire size and rear ratio.Dan, what would be a good rear gear ratio for this trans and 340 B-1 headed engine with a comp cam 550 lift 306 duration. Mostly street with some racing.
Thank you DanClose ratio 4-speed likes more gear in the back, but it also depends on the tire height and what RPM you can live with on the street. This is a good tool to play around with picking tire size and rear ratio.
Calculate GEAR, RPM, MPH, TIRE DIAMETER