Hi all,
I am having trouble calculating transmission final gear ratios. Help me understand where I am going wrong. Below is the table for the 65-66 T10M1 gear set. By dividing the gear teeth by the corresponding cluster teeth should be the final ratio, but it does not match the advertised final ratio. What am I doing wrong?
Advertised Final Ratio Gear tooth count Cluster tooth count Ratio of gear teeth to cluster gear teeth
1st gear 2.36 36 17 36/17 = 2.12, should be 2.36
2nd gear 1.62 29 20 29/20 = 1.45, should be 1.62
3rd gear 1.20 27 25 27/25 = 1.08, should be 1.20
4th gear 1.00 26 29 26/29 = 0.90, should be 1.00
All four calculations can be corrected with the same "fudge factor" equal to 1.1154.
For example:
1st gear with 2.12 X 1.1154 = 2.36199, rounds to 2.36
2nd gear with 1.45 X 1.1154 = 1.61731, rounds to 1.62
3rd gear with 1.08 X 1.1154 = 1.20462, rounds to 1.20
4th gear with 0.90 X 1.1154 = 1.00000, rounds to 1.00
What am I missing?
Thanks
Cory
I am having trouble calculating transmission final gear ratios. Help me understand where I am going wrong. Below is the table for the 65-66 T10M1 gear set. By dividing the gear teeth by the corresponding cluster teeth should be the final ratio, but it does not match the advertised final ratio. What am I doing wrong?
Advertised Final Ratio Gear tooth count Cluster tooth count Ratio of gear teeth to cluster gear teeth
1st gear 2.36 36 17 36/17 = 2.12, should be 2.36
2nd gear 1.62 29 20 29/20 = 1.45, should be 1.62
3rd gear 1.20 27 25 27/25 = 1.08, should be 1.20
4th gear 1.00 26 29 26/29 = 0.90, should be 1.00
All four calculations can be corrected with the same "fudge factor" equal to 1.1154.
For example:
1st gear with 2.12 X 1.1154 = 2.36199, rounds to 2.36
2nd gear with 1.45 X 1.1154 = 1.61731, rounds to 1.62
3rd gear with 1.08 X 1.1154 = 1.20462, rounds to 1.20
4th gear with 0.90 X 1.1154 = 1.00000, rounds to 1.00
What am I missing?
Thanks
Cory