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#1 |
Senior Member
![]() Join Date: Feb 2010
Location: Falls City, Nebraska "100 Miles From Nowhere"
Posts: 2,219
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Gear ratio? 72 C-10 fleet,LWB
Ive got the cover off my third member and there was no tag on the bolts. anyway to Identfy what the ratio is or what type of rear end it is? I know its not a posi,and the cover has twelve bolts. Thanks for your input!
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#2 |
Registered User
![]() Join Date: May 2009
Location: Pemberton, BC
Posts: 1,075
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Re: Gear ratio? 72 C-10 fleet,LWB
Count the number of teeth on the ring gear and divide it by the number of teeth on the pinion gear. Voila!
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My goal in life is to be as good a person as my dog already thinks I am - Unknown |
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#3 | |
just can't cover up my redneck
Join Date: May 2004
Location: Columbus OH
Posts: 11,414
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Re: Gear ratio? 72 C-10 fleet,LWB
The tooth count numbers should be stamped into the edge of the ring gear.
41-10= 4.10 41-11= 3.73 41-12= 3.42 40-13= 3.08
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#4 |
Senior Member
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Location: Falls City, Nebraska "100 Miles From Nowhere"
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Re: Gear ratio? 72 C-10 fleet,LWB
Thank You Ron! I found a posi for $250, anything I need to know to install that thing? Will my standard axles work with a posi? Im new to truck restos so I Need all the help I can get! And again,Thank You! Michael. Thanks Longhair! Im a 51yr old Cherokee, my hairs long too! lol
Last edited by Ironangel; 02-27-2010 at 01:20 PM. |
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#5 | |
just can't cover up my redneck
Join Date: May 2004
Location: Columbus OH
Posts: 11,414
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Re: Gear ratio? 72 C-10 fleet,LWB
As long as you intend to keep the same gears, changing to a Posi is not that bad. The biggest thing is that you absolutely must have a dail indicator to measure the backlash of the gears before you take it apart. You absloutely must put it back to this same number when the new carrier goes in. Do not mess with the pinion at all.
If you are wanting to change gear ratio at the same time, seek professional help....no seriously. Pay a pro and use new gears whenever changing ratio. It shouldn't cost you any extra to install the Posi unit at the same time. Oh, and use a Synthetic gear lube in either case. It is cheap insurance.
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Bad planning on your part does not necessarily constitute an instant emergency on my part.... The great thing about being a pessimist is that you are either pleasantly surprised or right. ![]() |
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#6 | |
Registered User
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Location: Pemberton, BC
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Re: Gear ratio? 72 C-10 fleet,LWB
Quote:
x2 - What the Longhair said about replacing it.
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#7 | |
Senior Member
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Location: Falls City, Nebraska "100 Miles From Nowhere"
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Re: Gear ratio? 72 C-10 fleet,LWB
Quote:
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Michael of the clan Hill, "Two Seventy Two's" 71 1-ton Dually 350 4-Speed 71 C/50 Grain Truck, 350 Split-Axle 4-Speed 02 3/4 ton Express 14 Indian Chief Vintage 1952 Ford 8N, "Only Ford Allowed On The Property" ![]() "Be American, Buy American" ![]() Last edited by Ironangel; 02-27-2010 at 06:29 PM. |
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#8 | |
Senior Member
![]() Join Date: Feb 2010
Location: Falls City, Nebraska "100 Miles From Nowhere"
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Re: Gear ratio? 72 C-10 fleet,LWB
Quote:
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Michael of the clan Hill, "Two Seventy Two's" 71 1-ton Dually 350 4-Speed 71 C/50 Grain Truck, 350 Split-Axle 4-Speed 02 3/4 ton Express 14 Indian Chief Vintage 1952 Ford 8N, "Only Ford Allowed On The Property" ![]() "Be American, Buy American" ![]() |
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#9 | |
just can't cover up my redneck
Join Date: May 2004
Location: Columbus OH
Posts: 11,414
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Re: Gear ratio? 72 C-10 fleet,LWB
No problem, that's why we're here....Good luck with it.
__________________
You can review the site's rules here. Quote:
Bad planning on your part does not necessarily constitute an instant emergency on my part.... The great thing about being a pessimist is that you are either pleasantly surprised or right. ![]() |
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#10 |
Senior Member
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Location: Falls City, Nebraska "100 Miles From Nowhere"
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Re: Gear ratio? 72 C-10 fleet,LWB
Ok,heres what I got.Its a 43-14, and I came up with 3.07.Is that a highway gear or what?Somebody tell me these pinion teeth marks are supposed to be there!
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Michael of the clan Hill, "Two Seventy Two's" 71 1-ton Dually 350 4-Speed 71 C/50 Grain Truck, 350 Split-Axle 4-Speed 02 3/4 ton Express 14 Indian Chief Vintage 1952 Ford 8N, "Only Ford Allowed On The Property" ![]() "Be American, Buy American" ![]() Last edited by Ironangel; 02-28-2010 at 12:50 AM. |
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#11 |
Big Red - Now its a SWB!
Join Date: Jun 2009
Location: Oroville, Ca
Posts: 1,624
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Re: Gear ratio? 72 C-10 fleet,LWB
yeah that can't be good! I'd say it's time for the works; seals, bearings, gears and carrier. If you swap the carrier you might as well find a posi or locker because it won't be any more work. You could always find a good used rear but that's a gamble too. And while you are changing things you should figure out what ratio will be best for you. The 3.08's you have are a highway gear. Let us know more what your plans are: engine, trans, tire size, usage, etc, etc. Good luck with it.
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68 3/4 ton ![]() ![]() 41 3/4 ton ![]() 01 Tahoe LT 4WD (my daily driver)-Magnaflow Muffler, Rollin on 22's 02 Ford Mustang Convertable (Wife's Car)-Flowmaster 50, Clear corners, Intake, sittin on 18's Last edited by Jacfourteen; 02-28-2010 at 02:29 AM. |
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#12 | |
just can't cover up my redneck
Join Date: May 2004
Location: Columbus OH
Posts: 11,414
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Re: Gear ratio? 72 C-10 fleet,LWB
Yup that's bad....
You have a pinion bearing problem of some kind. I would say that the pinion nut is/was loose or the outer bearing is severely worn. The pinion has shifted toward the centerline of the axle, hitting the carrier. This is going to be on the higher end of repairs. You may be better off in finding another complete housing already loaded with the gear ratio you need.
__________________
You can review the site's rules here. Quote:
Bad planning on your part does not necessarily constitute an instant emergency on my part.... The great thing about being a pessimist is that you are either pleasantly surprised or right. ![]() |
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#13 |
Senior Member
![]() Join Date: Feb 2010
Location: Falls City, Nebraska "100 Miles From Nowhere"
Posts: 2,219
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Re: Gear ratio? 72 C-10 fleet,LWB
Will do and and thanks Longhair
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__________________
Michael of the clan Hill, "Two Seventy Two's" 71 1-ton Dually 350 4-Speed 71 C/50 Grain Truck, 350 Split-Axle 4-Speed 02 3/4 ton Express 14 Indian Chief Vintage 1952 Ford 8N, "Only Ford Allowed On The Property" ![]() "Be American, Buy American" ![]() |
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