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Projects & Parts => Garage/Tech => Topic started by: Blazin40s on February 02, 2011, 06:38:07 PM

Title: gear ratio markings
Post by: Blazin40s on February 02, 2011, 06:38:07 PM
I know this has been asked b4, but how do u tell gear ratio from the numbers stamped on the ring gear?
Title: Re: gear ratio markings
Post by: RIP_K52007 on February 02, 2011, 07:01:59 PM
divide the big number by the little number

like 42 & 13 would be a 3.23:1
Title: Re: gear ratio markings
Post by: Blazin40s on February 02, 2011, 08:55:11 PM
Mine has numbers on it:  1gm 3977334  10  41  12  19
Title: Re: gear ratio markings
Post by: Blazin40s on February 02, 2011, 08:56:18 PM
So do I divide 41 by 10?
Title: Re: gear ratio markings
Post by: RIP_K52007 on February 02, 2011, 09:13:49 PM
i did 41 / 12  be a 3.42 but idk for sure.. thats just how ive done it
Title: Re: gear ratio markings
Post by: Blazin40s on February 02, 2011, 09:16:01 PM
I was told axle is a 4.10.......and if u do high number by little number that would be 4.10
Title: Re: gear ratio markings
Post by: RIP_K52007 on February 02, 2011, 09:20:09 PM
maybe haha  if its sposed to be 4.10 then thats probably it... 3.42 is more common gear. the numbers are how many teeth are on the ring gear vs how many there are on the pinion so if you can see in there to count those it will either have 10 or 12 teeth on the pinion.
Title: Re: gear ratio markings
Post by: marshall on February 02, 2011, 09:22:33 PM
yes, its a 4.10, thats how you do it.

i usually count the ring teeth and pinion teeth and divide, not all are marked
Title: Re: gear ratio markings
Post by: Blazin40s on February 02, 2011, 09:39:57 PM
Last two numbers are sussposed to be month and year.....but i know this in not from december 1919   lol
Title: Re: gear ratio markings
Post by: RIP_K52007 on February 02, 2011, 09:42:29 PM
Quote from: Blazin40s on February 02, 2011, 09:39:57 PM
Last two numbers are sussposed to be month and year.....but i know this in not from december 1919   lol

==lmaoo
Title: Re: gear ratio markings
Post by: Eroq on February 03, 2011, 12:08:23 AM
first pair of numbers is gear ratio, last is date 
Title: Re: gear ratio markings
Post by: Blazin40s on February 03, 2011, 01:02:02 AM
Quote from: Eroq on February 03, 2011, 12:08:23 AM
first pair of numbers is gear ratio, last is date 

Ok so what would 12 19 mean as second set of numbers?