question for "gear heads"

[Guest]

i have a question for all you gear heads. i got a Dana 44 carrier from a friend today i counted the teeth on the ring gear my question is how do i figure out the gear ratio? the one i got from him has 42 teeth the stock one i pulled out of the Cherokee axle has 46 teeth 3.55 gear ratio i need one for 4.10 's

thanks

matt

 

[James K]

Are there #'s on the ring gear?

If so it should be somethen like 41-10 or 43-11 or ?
Divide the #'s you will get your answer.

 

[BBowski82]

I'm assuming you got a pinion with it? you did didn't ya?

 

[Guest]

yes but all i want is the carrier no i didant count the teeth on it ill do it tomorrow

 

[Herzog]

Yeah, count the number of teeth on the pinion. Then divide the number of Ring gear teeth by the number of Pinion teeth, and that will give you your ratio.

 

[bobdog]

Here you go.
46-13=3.54
39-11=3.55
41-11=3.73
45-11=4.09
41-10=4.10
47-11=4.27
50-11=4.55
44-9=4.89
43-8=5.38

I would count again. I bet you actually have the 41 tooth 3.73 carrier but you may have the 4.10. I have also heard of a 43-10 4.30 gear from a isuzu but it used the higher(numerically lower) ratio carrier

 

[bobdog]

You really need to just compare carriers you will easily be able to tell the difference.

 

[BlackSheep]

Driven over drive

for example:

ring (driven by pinion) = 46
pinion (drives the ring) = 13

46/13 = 3.54

 

[Skyetone]

Here is a stupid twist on the same Q. What if you could just get a ring gear, could you replace it if it had say an 11 pinion? I know all the stupid comments already. so don't bother. I'm serios. Or is the pinion a different size from the 3.55 to the 4.55's? plus i thought it was 4.56's...

 

[Herzog]

I'm pretty sure gearsets are cut to match eachother. So you can't take a pinion from one gearset and run it with a ring from another. I don't think it would work.

 

[Guest]

ok i counted the pinion teeth 12



ring 42t
pinion 12t

=3.50 and that sux anybody want it??

 

[NoTrax]

Originally posted by bobdog
Here you go.
46-13=3.54
39-11=3.55
41-11=3.73
45-11=4.09
41-10=4.10
47-11=4.27
50-11=4.55
44-9=4.89
43-8=5.38

I would count again. I bet you actually have the 41 tooth 3.73 carrier but you may have the 4.10. I have also heard of a 43-10 4.30 gear from a isuzu but it used the higher(numerically lower) ratio carrier

Matt, are you sure you counted right? 42 and 12 isnt in the list, niether is 42 in any equation or 12. You sure its not 41 and 11?(assuming herzog put in a complete list)

 

[bobdog]

None of the RandP charts I could find listed a 3.50 gear set for Dana but that does not mean nobody makes them. I thought 3.50 was a Ford 9" ratio only.

 

[NoTrax]

hes not sure exactly which rig it came out of, the guy he got it from has alot of fords... and a chevy so who knows.

 

[Herzog]

Originally posted by LiltraxUtah

(assuming herzog put in a complete list)

I didn't type that list.

 

[Guest]

Originally posted by bobdog
I thought 3.50 was a Ford 9" ratio only.

i think it might be a ford 9" it looks diffrent

 

[bobdog]

3.50 gears are available for reverse spiral dana 44s for the front of ford trucks sorry for the bad info I gave earlier. They are not available for standard low pinion44s as far as I know.

 

[Guest]

Originally posted by bobdog
3.50 gears are available for reverse spiral dana 44s for the front of ford trucks sorry for the bad info I gave earlier. They are not available for standard low pinion44s as far as I know.

yep that is what it is !!