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#1 |
Registered User
Join Date: Aug 2011
Location: manti utah
Posts: 95
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found this stamped on the ring in rear end
41:11 does this mean 41 divided by 11 which is a 373 gear ratio? is 373 any good for a k10? is a twelve bolt a strong axle?
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#2 |
Registered User
Join Date: Aug 2011
Location: manti utah
Posts: 95
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Re: found this stamped on the ring in rear end
thanks in advance
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#3 |
Senior Member
![]() Join Date: Jun 2009
Location: Phoenix AZ
Posts: 4,564
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Re: found this stamped on the ring in rear end
It is a 3.73 ratio. I think 3.73 is a good all around ratio. Decent mileage and still good pep. The 12 bolt is plenty strong.
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AZPartsLocators on Instagram 1972 Cheyenne Super Short Bed big block "Blackie" 1977 Crew Cab GMC Short bed with 4BT Intercooled Cummins Diesel and a 4L80e "The Junkyard Dog" 1985 Crew Cab Chevy dually with 5.9 Cummins "The Big Dog" This is what my dad liked to be called by the grandkids before he passed so it seems fitting for his old truck. |
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#4 |
Registered User
Join Date: Aug 2011
Location: manti utah
Posts: 95
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Re: found this stamped on the ring in rear end
thanks so the one out at the salvage yard should fit perfectly i think i may order a rebuild kit too have on hand too
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#5 | |
Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,194
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Re: found this stamped on the ring in rear end
Quote:
If you count the teeth you will find 41 teeth on the ring gear and 11 on the pinion. 41 / 11 = 3.73 K
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#6 |
Registered User
Join Date: Sep 2010
Location: Lake Tahoe, Nevada
Posts: 755
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Re: found this stamped on the ring in rear end
3.73 is a good ratio if you have 31 to 33 inch tires, but I can tell you from personal experience, it's lousy with 40 inch tires.
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I know a little about cars, but if you have a question about electricity or sport quads, I'm your man!!! |
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#7 |
Registered User
Join Date: Jul 2012
Location: Salt Lake City
Posts: 59
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Re: found this stamped on the ring in rear end
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#8 | |
Charlie Daniels w/ a Tq Wrench
Join Date: May 2009
Location: Statesville, NC
Posts: 1,570
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Re: found this stamped on the ring in rear end
Yep, that would be 41 on the ring and 11 on the pinion, 3.73. The ring gear is usually stamped with this. For most stock or mildly modified trucks the 12 bolt is plenty strong, now if you are running 37" plus tires and offroading it hard, sure you will need to look for something stronger, but for normal driving, slight offroading and a little playing around it is fine. Better than the 10 bolts.
Quote:
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ΜΟΛΩΝ ΛΑΒΕ 67 C10 Shortbed "Great Grandpa's Truck" I6 3 on the Tree 71k original miles 5.3 swap in the works69 K5 Blazer-Family Beach Cruiser Project 78 K30 Dually Semi-Retired Fire Truck 350/SM465 35"s SOLD01 2500HD ECSB 6.0 4x4 5.13's 8" lift 38"s |
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#9 |
Registered User
Join Date: Oct 2009
Location: Prescott, Arizona
Posts: 2,396
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Re: found this stamped on the ring in rear end
The weakest link in the truck 12 bolt is the pinion diameter at 1.4". I've snapped mine twice now on the street playing around. Just the grunt of the engine and loafing around a 4,960 lbs. 4x4 blazer takes a toll on it.
Passenger car 12 bolts have a 1.625" pinion so you never see this problem. I'm looking for a semi float 14 bolt to drop in now for a little more strength so I don't have to keep driving it home in 4hi on the front axle ![]() |
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#10 |
Registered User
Join Date: Aug 2011
Location: manti utah
Posts: 95
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Re: found this stamped on the ring in rear end
ha ya im running mine in 4 hi on the front till i can afford another rear end too actually
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#11 |
Registered User
Join Date: Oct 2009
Location: Prescott, Arizona
Posts: 2,396
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Re: found this stamped on the ring in rear end
I only did that when it broke. Now I just try to be a little easier at the stoplights until I find something better. Although I'm taking it to the dragstrip for club track day this weekend to get a time out of it. Gotta drive it about 300 miles so I better take it easy out of the hole and keep it in one piece
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differential, rear axle |
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