1941 Pickup transmission

[Juergen]

Originally Posted by Charlie Stephens

Charlie ny,

How would these gears work if he changed his rear end to 3.54 or 3.27? Low gear for take off and high gear for the freeway.

Charlie Stephens

You can get an idea of the change by looking at the gear ratios. For a 16 tooth input, the 28 tooth cluster teeth are 28 -24 (2nd)-18 (1st)-15(reverse). With a 29 tooth 1st/reverse slider and a 22 tooth second gear the ratios are: 28/16 x 29/18 = 2.82 for 1st gear and 28/16 x 22/24 = 1.60 for 2nd gear

For a 15 tooth input, the 29 tooth cluster teeth are 29-24-18-14. First gear is 29/15 x 29/18 = 3.11 while second is 29/15 x 22/24 = 1.77.

Hence the 1st and 2nd ratios are about 10% wider for the 29 tooth trans compared to the 28 tooth. What does it mean? It means it acts as if the rear end were 10 % lower numerically while in first or second. Hence if you like your present response in first or second, you can switch to a 10 % higher rear end and get a 10% reduction in engine speed while in high gear while retaining your response in the lower gears.

[V8COOPMAN]

Originally Posted by Juergen

What I wrote is that the wide ratio trans coupled with a 10% lower numerically rear end lowers engine speed by 10% in high (direct) gear (while having the same engine speed/torque in the lower gears).

Juergen.....NOW I fully understand what you were getting at. Much appreciated! DD