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Author Topic: 12 bolt carriers  (Read 3075 times)

Offline 79diesel

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12 bolt carriers
« 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
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79 Sierra Diesel 5.9 Cummins/NV4500

Offline SUX2BU99

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Re: 12 bolt carriers
« Reply #1 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.
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85 Chevy Silverado C10 short, wide, yellow, 2wd. Lowered, 60-over 350 with Dart Iron Eagle heads and Comp Cams XE268 cam, TH350 w/ shift kit, 3.40 Gov-lok 12 bolt.

Offline Captkaos

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Re: 12 bolt carriers
« Reply #2 on: June 25, 2008, 02:38:16 pm »
3.42 and below will fit the same carrier.
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Offline 79diesel

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Re: 12 bolt carriers
« Reply #3 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
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Offline VileZambonie

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Re: 12 bolt carriers
« Reply #4 on: June 25, 2008, 09:15:21 pm »
I wouldn't go any lower (numerically) than 3.42:1
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