what gear ratio - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jd4300fel · 10-14-2009, 03:03 PM

hi quick question (hopefully)
i am wondering was gear ratio came in the the typical coil sprung c10's
I have 4.11 gears and need to change gears or swap axles Or what year axles will swap in 73 and up i can't afford to swap
t o 5 or 6 lug.

hayhauler71 · 10-14-2009, 04:09 PM

Mine had 3.08 gear ratio.

69GMCLonghorn · 10-14-2009, 04:34 PM

Apparently in the 1/2 tons there was a big range of gears available from 3.08 to 4.10. I think only the 3/4 or 1 ton's could be had with 4.56 or 5.something's

'72customdeluxe · 10-14-2009, 07:39 PM

3.73's and 3.08's are common

Longhorn Man · 10-15-2009, 02:10 PM

4.10 avalible but uncommon
3.73 and 3.07 were both very common and both standard with certian powertrain combos.
I can't fugure out the second part... if you have a half ton, then why would you need to swap to a 5 or 6 lug? It should already be a 5 or 6 lug.
There are no bolt in rear axle assemblys after 72

jd4300fel · 10-15-2009, 05:33 PM

longhorn, my current truck is a c20 that has the dana axle with 8 lug. i am looking at a gear change. a person is parting out a C10. (krazyray ) trying to decide if i do gear change and keep the 8 lug 600$. or put a 5 lug rear axle and then convert the front. Does any one make a conversion for the front the just replaces the rotor?

Longhorn Man · 10-15-2009, 06:05 PM

you won't be able to just toss C/10 gears in a C/20. The only way that'll happen is if they both have dana60 rear ends which is so unlikely that we can all assume it isn't so.

10-14-2009, 03:03 PM	#1
jd4300fel Registered User Join Date: Aug 2002 Location: wheatland, Ca Posts: 427	what gear ratio hi quick question (hopefully) i am wondering was gear ratio came in the the typical coil sprung c10's I have 4.11 gears and need to change gears or swap axles Or what year axles will swap in 73 and up i can't afford to swap t o 5 or 6 lug. __________________ Mike K Friend of Bill W Last edited by jd4300fel; 10-14-2009 at 05:26 PM. Reason: addtional information

10-14-2009, 04:09 PM	#2
hayhauler71 Registered User Join Date: Aug 2009 Location: St. Paul MN. Posts: 1,996	Re: what gear ratio Mine had 3.08 gear ratio.

10-14-2009, 04:34 PM	#3
69GMCLonghorn Registered User Join Date: Dec 2006 Location: Porter Ranch, CA Posts: 978	Re: what gear ratio Apparently in the 1/2 tons there was a big range of gears available from 3.08 to 4.10. I think only the 3/4 or 1 ton's could be had with 4.56 or 5.something's

10-14-2009, 07:39 PM	#4
'72customdeluxe Registered User Join Date: Jan 2008 Location: Tejas Posts: 691	Re: what gear ratio 3.73's and 3.08's are common __________________ '72 cheyenne super step, '05 long bed gmc

10-15-2009, 02:10 PM	#5
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: what gear ratio 4.10 avalible but uncommon 3.73 and 3.07 were both very common and both standard with certian powertrain combos. I can't fugure out the second part... if you have a half ton, then why would you need to swap to a 5 or 6 lug? It should already be a 5 or 6 lug. There are no bolt in rear axle assemblys after 72

10-15-2009, 05:33 PM	#6
jd4300fel Registered User Join Date: Aug 2002 Location: wheatland, Ca Posts: 427	Re: what gear ratio longhorn, my current truck is a c20 that has the dana axle with 8 lug. i am looking at a gear change. a person is parting out a C10. (krazyray ) trying to decide if i do gear change and keep the 8 lug 600$. or put a 5 lug rear axle and then convert the front. Does any one make a conversion for the front the just replaces the rotor? __________________ Mike K Friend of Bill W

10-15-2009, 06:05 PM	#7
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: what gear ratio you won't be able to just toss C/10 gears in a C/20. The only way that'll happen is if they both have dana60 rear ends which is so unlikely that we can all assume it isn't so.



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