GM Drivetrain & Suspension Chassis | Transmission| Driveshaft | Gears/Rear End/Differential | Traction Aids

Is 4.56 the biggest gear available with 8.6" 10bolt?

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Old Dec 12, 2007 | 10:44 PM
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Default Is 4.56 the biggest gear available with 8.6" 10bolt?

or is 5.13 avILABLE?
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Old Dec 12, 2007 | 10:53 PM
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i've never seen a 5.13 for that 10 bolt. why do you wanna go that high?
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Old Dec 12, 2007 | 10:58 PM
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cuz the truck only has 4.8L
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Old Dec 12, 2007 | 11:46 PM
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Yes they make 5.13's for 10 bolts. There's plenty of guys on gmfullsize running them. You'll only need that big of a gear if you run 38's or bigger.
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Old Dec 12, 2007 | 11:50 PM
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4.88 and 5.13 are available. I thought I read somewhere something deeper was coming out but Im not sure.
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Old Dec 12, 2007 | 11:54 PM
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What's the point of them coming out with something numberically higher. Anything more than that and you're an idiot for keeping the 10 bolt.
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Old Dec 13, 2007 | 12:09 AM
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5.13 should be plwnty of gear. with 31.6" tires and 6500epms it will go 113 mph drive.

im not worried about the lil motor breaking anything
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Old Dec 13, 2007 | 12:13 AM
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Originally Posted by dug
5.13 should be plwnty of gear. with 31.6" tires and 6500epms it will go 113 mph drive.

im not worried about the lil motor breaking anything
Dude that's WAAY too much of a gear for a 32" tire. Hell even 4.56's are probably too much for those.

EDIT-What are your plans for this truck? I hope you don't plan to ever go on the highway. You'll be turning like 4k rpms at 70 mph.
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Old Dec 13, 2007 | 12:17 AM
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Hmm actually only 2650 rpms at 70 mph.
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Old Dec 13, 2007 | 12:26 AM
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if he wants more lowend grunt without doin alot of crap then why not swap the gears?
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