Gear ratio 3" vs 3.5" pitch

[Greg5658]

Does anyone know the actual gear ratio difference between the 3" vs 3.5" pitch drivers?

 

[papajake]

probably .5

 

[cdnredneck_t3]

If the 3 pitch is 7 tooth and 3.5 is 6 tooth the circumference will be the same. 7x3=21 and 6x3.5=21

 

[Greg5658]

Ya now that I've got the stock drivers out I'm finding that they're the same.

If the 3 pitch is 7 tooth and 3.5 is 6 tooth the circumference will be the same. 7x3=21 and 6x3.5=21

 

[Dynamo^Joe]

The 3.0 is a 7 tooth and the 3.5 is a 6 tooth.
The 3.0 has a 50.29 constant. The 3.5 has a 50.30 constant. So a 21-51 in either gearcase has the same mph regardless of 3.0 or 3.5 pitch.

https://www.ibackshift.com/calculator

 

[Greg5658]

That's a great link. Thanks.

The 3.0 is a 7 tooth and the 3.5 is a 6 tooth.
The 3.0 has a 50.29 constant. The 3.5 has a 50.30 constant. So a 21-51 in either gearcase has the same mph regardless of 3.0 or 3.5 pitch.

https://www.ibackshift.com/calculator