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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: 79diesel on June 24, 2008, 08:05:55 pm

Title: 12 bolt carriers
Post by: 79diesel on June 24, 2008, 08:05:55 pm

on a 12 bolt rear end will 3.08 gears work on a carrier with 2.73 gears? or do i need a different series carrier?
thanks

Title: Re: 12 bolt carriers
Post by: SUX2BU99 on June 25, 2008, 01:09:05 pm

On my research recently for 12 bolts, I've seen that 2.73-3.42 used the same carrier. Ask the vendor you want to buy those gears from to be sure though.

3.08 from 2.73 is a pretty small jump. Unless you're replacing the gears because the 2.73s are munched and you're getting the 3.08 for free, you should move at least 2 steps (like 3.23 or 3.42) to notice any difference.

Title: Re: 12 bolt carriers
Post by: Captkaos on June 25, 2008, 02:38:16 pm

3.42 and below will fit the same carrier.

Title: Re: 12 bolt carriers
Post by: 79diesel on June 25, 2008, 06:32:26 pm

ok thanks..yeah i messed up the 2.73 pinion pretty good. They were a little to tall with my .75 overdrive anyway so was thinking i would try 3.08s..but maybe 3.23 would be a little better. I have 3.73s right now and top out at 75 mph lol

Title: Re: 12 bolt carriers
Post by: VileZambonie on June 25, 2008, 09:15:21 pm

I wouldn't go any lower (numerically) than 3.42:1