fez
Registered User
this mind sound like a dumb question but how do I find out what gear ratio I have?
how do I find out what my gear ratio is?
- Thread starter fez
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Ididriver
Full Access Member
my dad use to put a chalk line on the driveshaft and counted how many times it rotated for every complete turn of the wheel
say it took just barlley over 4=4.10 gearing 3 and half would equal 3.55
always seemed to work ive never personally done it tho
say it took just barlley over 4=4.10 gearing 3 and half would equal 3.55
always seemed to work ive never personally done it tho
fez
Registered User
alright ill do the first one cause the guy i bought this from was the original owner and he was not one to change anything. and if i have to ill mark a line on the driveshaft and count the rotations. thanks
MIDNIGHT RIDER
Full Access Member
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This would be a good excuse to change out the rear-end lube.
Drain the rear-end, remove the cover, and rotate the ring-gear around until you come across some numbers stamped in it's edge.
Of course, equipped with these numbers, you can then do the math.
41:10 = 41 teeth on the ring and 10 teeth on the pinion; 41 divided by 10 = 4.1 or for our purposes 4.10
37:9 = 4.11
For what it's worth, although for all practical purposes the gearing is so close as to be considered the same, a 4.10 set of gears is immensely stronger than a set of 4.11s, due to that extra tooth on the pinion making the pinion head so much stronger; if you saw both side-by-side you could see what I mean.
I can't right off remember the tooth counts; but, there are also two separate gear-sets that provide either 3.54s or 3.55s and I can't remember just which of these two is the stronger.
Drain the rear-end, remove the cover, and rotate the ring-gear around until you come across some numbers stamped in it's edge.
Of course, equipped with these numbers, you can then do the math.
41:10 = 41 teeth on the ring and 10 teeth on the pinion; 41 divided by 10 = 4.1 or for our purposes 4.10
37:9 = 4.11
For what it's worth, although for all practical purposes the gearing is so close as to be considered the same, a 4.10 set of gears is immensely stronger than a set of 4.11s, due to that extra tooth on the pinion making the pinion head so much stronger; if you saw both side-by-side you could see what I mean.
I can't right off remember the tooth counts; but, there are also two separate gear-sets that provide either 3.54s or 3.55s and I can't remember just which of these two is the stronger.
lynch
little stinker
i have a 94 f250 diesel and the axle code is 35 and they are 410s we just bought a 92 that has a axle code that is 45 and its 410s to. Go to google and type ford axle codes and there should be a site that will tell u all the codes and what gears they are.
fez
Registered User
thanks guys
fez
Registered User
it is 4:10 gear ratio
