The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Need fitment info on 12 bolt rear end from newer trucks

aggie91 · 12-18-2014, 12:28 PM

With some simple mods the 10 bolt in your truck can withstand the LS swap.

I have a 10 bolt with 3:73 gears that I am going to use in my '85 with a LS swap. Only changes I am going to make are to replace all the bearings and seals. Once I have about $300 saved up, I will put in a Spartan Locker diff into the stock carrier.

For you, I would look at Moser, Yukon Gear and Axle or similar companies and replace the Ring & Pinion, the carrier and maybe up grade the axles to 30 spline with the gears you want...

Axles: http://www.moserengineering.com/axle...spline-29.html
Posi Carrier: http://www.yukongear.com/PartsList.a...+Positractions
Gears: http://www.yukongear.com/ProductDeta...px?ProdID=5309

12-18-2014, 12:28 PM	#4
aggie91 I'm just glad to be here! Join Date: Jan 2008 Location: Longview, TX Posts: 4,788	Re: Need fitment info on 12 bolt rear end from newer trucks With some simple mods the 10 bolt in your truck can withstand the LS swap. I have a 10 bolt with 3:73 gears that I am going to use in my '85 with a LS swap. Only changes I am going to make are to replace all the bearings and seals. Once I have about $300 saved up, I will put in a Spartan Locker diff into the stock carrier. For you, I would look at Moser, Yukon Gear and Axle or similar companies and replace the Ring & Pinion, the carrier and maybe up grade the axles to 30 spline with the gears you want... Axles: http://www.moserengineering.com/axle...spline-29.html Posi Carrier: http://www.yukongear.com/PartsList.a...+Positractions Gears: http://www.yukongear.com/ProductDeta...px?ProdID=5309 __________________ Karl 1965 Chevy Stepside(Grandpa's Old Blue) and (July 2015 Shop Build!)(2020, the Saga Continues) http://67-72chevytrucks.com/vboard/s...d.php?t=372424 The LST Challenge: http://67-72chevytrucks.com/vboard/s...=1#post7812257 Korbin's 1st Square: "Sunburn" http://67-72chevytrucks.com/vboard/s...d.php?t=418618 1985 GMC Sierra: "White Trash", Korbin's 2nd now... http://67-72chevytrucks.com/vboard/s...d.php?t=632305 Henry - 1984 Chevrolet, Owen's 1st Square Last edited by aggie91; 12-18-2014 at 12:38 PM. Reason: links to parts...