(41 tooth ring & 11 tooth pinion), does that equal 4.10 so how many teeth are on 373. At the shop where im getting them i know i counted a little more then 40 teeth i just dont wanna be jipped. Thanks.

 

41/11 is 3.73....

 

My 4.10's, which unfortunately are still in the box, are 41 on the ring and 10 on the pinion. They could be other combinations if you have a larger pinion. Just divide the teeth on the ring by the teeth on the pinion. So in my case 41 (ring) divided by 10 (pinion) = 4.10. [/align]

 

Here are the typical ring/pinion combinations for popular Ford 8.8" rear-end ratios...[/align][/align][/align]

 

They are 4.10s after all and thanx for the help i just dont trust mechanics it said 3.73 he said they just put them in the wrong box. So now i know.

 

Just FYI, the Motive 3.90s are 43/11. 3.909 is what it works out to. This is why some companies call them 3.91s.

 

[/align][/align]That would make them run a bit smoother, and reduce the tooth load...[/align]

 

well they are installing the 4.10s as we speak