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05-13-2015, 05:49 PM
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#1 |
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Registered User
Join Date: Dec 2009
Location: Scott., Louisiana
Posts: 19
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Rear End Gears
Hello
I have a 82 chevy c10 LWB with a 383 stroker with a 700R4 with lockup. I think my gears are 308's which I think are to high. What gear should I go with 342 or 373? |
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05-13-2015, 07:50 PM
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#2 |
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Registered User
Join Date: Aug 2005
Location: Louisiana
Posts: 711
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Re: Rear End Gears
I personally like a 3.73 with a 28"-30" tire and a 700R4.
3.42 for 25"-27" |
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05-14-2015, 07:19 AM
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#3 |
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Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,226
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Re: Rear End Gears
3.73.
They are perfect with the overdrive trans. K
__________________
Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/ |
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05-14-2015, 08:17 AM
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#4 |
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Registered User
Join Date: Aug 2011
Location: Gallatin, TN
Posts: 782
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Re: Rear End Gears
What Keith said....
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77 C10, 6.0LS/4L80E, 3:73 12 bolt. Boss 338's 20" x 10" w/ 285/50/20 rear. 20" x 8.5" w/ 245/40/20 front. Vintage Air. Full Autometer gauges recessed in factory bezel (Thanks bigblock73!) Gm Storm Grey Metallic paint "Cool ain't ever cheap and cheap ain't ever cool" |
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05-14-2015, 10:41 AM
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#5 | |
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Parts and more parts
Join Date: Nov 2003
Location: Lebo, Kansas (middle of nowhere
Posts: 6,821
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Re: Rear End Gears
Quote:
My truck is a 383 stroker, 700R4 tranny, 28" tall tire, with a 12 bolt 3.73 geared rear end.
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Frank |
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05-14-2015, 11:28 AM
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#6 |
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Registered User
Join Date: Dec 2009
Location: Scott., Louisiana
Posts: 19
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Re: Rear End Gears
OK I'm guessing when you say 12 bolt that that is the bolts on the cover. If so I only have 10 bolt. should I find a 12 bolt are is a 10 good enough?
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05-14-2015, 09:32 PM
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#7 | |
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Registered User
Join Date: Mar 2014
Location: Blossvale NY
Posts: 202
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Re: Rear End Gears
Quote:
I don't know whether or not a 12-bolt is that much heavier duty than the 10 to justify the search for one. The ring gear in the 12-bolt is little larger than the 10-bolt (8.875" to 8.5" respectively) Also, the 12-bolt uses 12 bolts to fasten the ring gear to the carrier where the 10-bolt uses 10. I am not certain if there are more things the 12-bolt axle has over the 10 beyond that, or if these make the 12-bolt significantly tougher either. I would defer to some of the more experienced members here on that subject. Also, it should be noted that the 12-bolt passenger car axle is different than the truck axle. The car axle seems to be more desirable to builders from what I gather. Seems like I have read that the truck axle has a smaller pinion shaft. But if it were me and I intended to flog an axle with bigger HP and torque and decided to swap axles for something better suited to that than the 10-bolt, I would get something heavier than the 12-bolt..along the lines of a Dana 60 or GM 14-bolt FF.
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