bigcountryk5
1/2 ton status
how do i figure out what kind of gears are in my axle's?
i figure i have to pull the cover off but what then?
i figure i have to pull the cover off but what then?
CK5
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gears?
- Thread starter bigcountryk5
- Start date
spearchucker
1/2 ton status
1) You can pull the cover off and count the # of teeth on the ring gear and divide that by the # of teeth on the pinion gear. You also get to inspect the diff fluid for metal shavings.
2) There should be a stamp on the ring gear.
3) You can leave the diff cover on and put a chalk mark on the driveshaft and a mark on a tire. Have someone drive in a straight line slowly and count the number of times the driveshaft rotates after the tire rotates one time.
2) There should be a stamp on the ring gear.
3) You can leave the diff cover on and put a chalk mark on the driveshaft and a mark on a tire. Have someone drive in a straight line slowly and count the number of times the driveshaft rotates after the tire rotates one time.
bigcountryk5
1/2 ton status
thanks!
87BrnRsd
1/2 ton status
The chalk mark on the driveshaft method works, but its sometimes off. Sometimes doing it that way is hard to tell the difference between 3.73's and 4.10's, or 3.42's and 3.73's. The best way to make sure you know exactly what the gear ratio is, is to pull the diff cover. There will be a stamp on the outside edge of the ring gear. There will be a string of numbers. The first one is a long one which is the serial number. Then there will be 4 more. 2 of those are the gear ratio, you divide the two to find the gear ratio. Im going from memory so it might not look exactly like this but it should be something close: (17854623-serial number, then 7 81-this would be the build date july 1981 in this case, then 9 41-this would be 4.56's in this case). It might not look exactly like that (17854623 7 81 9 41), but you get the idea.
-Harrison
-Harrison
bigcountryk5
1/2 ton status
thanks again for the help
R72K5
Banned
to know 100% pull diff cover and look on outside flat edge of ring gear, it iwll ahve teeth counts of both gears stamped into it, and also gm part number and also date stamping code, divide the teeth counts to get ratio
LittlecountryK15
Registered Member
we got it off and the only number seen were 6 21 76 DANA E 18520 A3D6 45 11.......I divided 45 11 and got 4.0909091 so does that mean that I have 4:10 gears or am I doing this wrong?
