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Old 02-13-2009, 02:43 AM   #1
1978skeens
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rear end what gears??

My truck has a 12 bolt rear end and it use to be a inline six, from my research they had a 3.42, 3.73, or a 4.10 gear my truck runs high rpm at 3000rpm at 58mph with 26in tall tires. Is there any codes or anything that would tell me what it is. Thanks
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Old 02-13-2009, 03:53 AM   #2
wildlandfirefighter
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Re: rear end what gears??

sorry man but i think you got to get down and dirty on this one. Take the cover off and do a little division like the good ol' elementary school days. Its way more fun that way anyways.

41 divided by 10 = 4.10
41 divided by 11 = 3.73
41 divided by 12 = 3.42
40 divided by 13 = 3.08
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Old 02-13-2009, 06:20 AM   #3
Prong
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Re: rear end what gears??

You have 4.11 gears according to http://www.csgnetwork.com/rpmcalc.html
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Old 02-13-2009, 06:48 AM   #4
fast75
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Re: rear end what gears??

divide the number of teeth on the ring gear by the number of teeth on the pinion.
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Old 02-13-2009, 04:11 PM   #5
1978skeens
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Re: rear end what gears??

thanks for the info I need to change the gear lube anyway.
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