# How to tell your gear ratios

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by blazingboy, Mar 21, 2002.

1. ### blazingboy1/2 ton status

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Isen't there some way you can tell what gear ratios you have by taking the cover off and counting the amount of teeth and dividing something.

2. ### Hossbaby503/4 ton status

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Count the number of teeth on the ring gear, and divide it by the number of teeth on the pinion.

3. ### Skigirl1/2 ton status

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Should actually be a number in there, like 41:11. Divide the second number into the first one and that's your gear size. Do a search, there are other posts re: the math on this.

4. ### 83ZZ502_Jimmy1/2 ton status

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The ring gear will have 41 teeth almost all the time. Just count the pinion and divide.

Ex. 41 / 10 = 4.10
41 / 11 = 3.73
41 / 12 = 3.42

5. ### tRustyK5Big meanieStaff MemberSuper ModeratorGMOTM WinnerAuthor

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Why count? It's stamped on the edge of the ring gear...

Rene

6. ### 83ZZ502_Jimmy1/2 ton status

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Agreed, but for the newbies its a learning experience IMO. Also some are stamped like 10 41 11 or 9 41 11. Ive seen some crazy stuff.

I was just being thorough. /forums/images/icons/smile.gif

John

7. ### tRustyK5Big meanieStaff MemberSuper ModeratorGMOTM WinnerAuthor

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True enough...you're right that 41 tooth ring gears seem the most common.

Rene

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