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EZR
03-26-2017, 05:18 PM
56.. 210..2dr..350 low hp..stock rearend..swapping stock 3 speed for a 4 speed what 1st. gear ratio should i look for and how do they effect proformance...muncie-t10-saginaw ? looking for light to light proformance

NCW
03-26-2017, 05:56 PM
Transmission
1st



M20 (63-65)
2.56



M20 (66>)
2.52



M21/M22
2.20

markm
03-27-2017, 07:27 AM
Super T10 are 2.43 -3.45, go to www.kajunjon.com and see his FAQ. we have only given you the tip of iceberg.

55 Rescue Dog
03-27-2017, 05:29 PM
Whatever you do avoid using the M21/22 2.20 close ratio first gear transmission on anything less than a 4.11 rear, or it is a clutch slipping dog off the line for normal driving. I had my M21 swapped to the wide ratio 2.56 first running a 4.47 rear gear for a better take off. The only big RPM drop is from 3rd to 4th with the wide ratio, but by then the fun part is over anyway..