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73-87chevytrucks.com
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73-87 Chevy _ GMC Trucks
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Rear Drivelines, Drive Axles and Gearing
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Swap 10 bolt to 12 bolt rearend
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Topic: Swap 10 bolt to 12 bolt rearend (Read 37352 times)
Blazin
Blazin new trails!
Global Moderator
Senior Member
Posts: 6130
Re: Swap 10 bolt to 12 bolt rearend
«
Reply #15 on:
July 05, 2011, 05:32:19 AM »
Pretty sure they missed on that one. I could be wrong, it has happend once before!
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Some people are like Slinkies. Not really good for anything, but they still bring a smile to your face when you push them down a flight of stairs
Irish_Alley
Tim
Global Moderator
Senior Member
Posts: 13319
Family is not an important thing. It's everything.
Re: Swap 10 bolt to 12 bolt rearend
«
Reply #16 on:
July 05, 2011, 10:39:53 AM »
I hear ya
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If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley
When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes
Captkaos
OWNER and Administrator
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Senior Member
Posts: 18376
Re: Swap 10 bolt to 12 bolt rearend
«
Reply #17 on:
July 21, 2011, 05:03:47 PM »
12bolts trucks are NOT stronger than 10bolts. 12bolt cars yes, truck no.
12 trucks have a smaller pinion shaft than 10bolts the only other difference is the size of the ring gear and you aren't gaining much by loosing pinion size. So it is a wahs in my opinon.,
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Chris Lucas
73-87chevytrucks
captkaoscustoms
squarebody
daman02
Newbie
Posts: 69
Re: Swap 10 bolt to 12 bolt rearend
«
Reply #18 on:
July 22, 2011, 09:28:02 PM »
Yes i have since abandoned the 12 bolt project and decided to just throw some 4.10's with a mini spool in my 10 bolt and let it rip. Any idea how much time can be knocked off at the track going from 3.42's to 4.10's? It ran an 11.7 in a 1000ft track i have near my house.
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'86 C10 Silverado 350 with 700r4 and 2500 stall
Dropped 2" in front and 2" in rear but soon to b 4" in rear
18x10 wheels with 295/45 18 tires
84scottsdale454
Newbie
Posts: 58
Re: Swap 10 bolt to 12 bolt rearend
«
Reply #19 on:
July 24, 2011, 08:49:57 AM »
I did a 10 to 12 bolt swap......it swaps out easy, fits right in, zero problems as long as it came out of a 12bolt c10 like mine did! Go for it, 2easy man!
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VileZambonie
Global Moderator
Senior Member
Posts: 19022
Re: Swap 10 bolt to 12 bolt rearend
«
Reply #20 on:
July 24, 2011, 11:45:04 AM »
I've heard it all but from experience I've grenaded and seen grenaded more 10 bolt than 12 bolts. Typically the carrier breaks at the pinion shaft as well as the differential gears more commonly in the 10 bolts. When this happens it usually trashes the entire housing. The most common failures I've seen with 12 bolts were a result of bearing failure.
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74 GMC
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84scottsdale454
Newbie
Posts: 58
Re: Swap 10 bolt to 12 bolt rearend
«
Reply #21 on:
July 24, 2011, 12:30:40 PM »
I'm sure most people would agree when I say "if u take care of ur truck,then it'll take care of you" no rearend is gonna hold up if u dog your truck, don't put 2 much thought into it,just do what u know will work, 12bolt will work and hold up good, mine does and I hot rod my truck some and if the torque from my 454 won't break my 12bolt then you'll be doing just fine, later dude
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chevymanrob
Registered Users
Posts: 100
Re: Swap 10 bolt to 12 bolt rearend
«
Reply #22 on:
July 24, 2011, 12:39:27 PM »
i swapped from 3.55s to 4.10s in my el camino and went from a 12.09 to 11.86 (1/4 mile). i think about 2 tenths should be pretty close. possibly a little more or less depending on where you cross the stripe rpm-wise and where your motor wants to be.
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ex G-body drag fan. best was 11.86 on a 93 octane SBC street car.
bigchevy74
Newbie
Posts: 5
Re: Swap 10 bolt to 12 bolt rearend
«
Reply #23 on:
July 26, 2011, 04:30:14 PM »
i have a 10 bolt with 4.10's and im pushing 400hp i want to keep my 10 bolt what can i do to it to make it stronger.....locker???
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1974 K10, 350ci bored 40 over, mild cam, 750 Holley, high rise intake, headers, flowmaster 40's, 8" lift, 35" mudders....and a whole lot of fun
"I asked God for a bike, but I know God doesn't work that way. So I stole a bike and asked for forgiveness."
chevymanrob
Registered Users
Posts: 100
Re: Swap 10 bolt to 12 bolt rearend
«
Reply #24 on:
July 26, 2011, 05:31:23 PM »
well other than making sure the bearings are good to go there isnt a whole lot i can suggest. i do personally like the powertraxx lockers (had one in the past). if you have an open diff but like your gear then definately go that route...no gear setup needed! other than spinning a carrier bearing in my Abody 12 bolt i didnt have any issues (11.86@113mph in a 3000 pound car).
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ex G-body drag fan. best was 11.86 on a 93 octane SBC street car.
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73-87chevytrucks.com
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73-87 Chevy _ GMC Trucks
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Rear Drivelines, Drive Axles and Gearing
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Swap 10 bolt to 12 bolt rearend