Rearend options.

Clay_Lucas · December 25, 2015

I'm on my second 10 bolt g80. It's nearly done, not many miles left on it befor it blows u0 like the last one.

What are the options for a rearend? I'm looking at the 14 bolt 3/4 ton but it's hard to find one for a decent price. Isn't there another year that almost fits? Needs some mounts moved and re welded? I don't have a problem with the six loss in the front and eight in back.

Sent from my SM-N900T using Tapatalk

Badass69 · December 25, 2015

9.5" 14 bolt was available in the half tons under code AXN. It's harder to find as it was only used in the 6 liter and 6.2 powered trucks from 2005 through 2013. The 05 to 07 classic ones all have drum brakes and then the newer ones are discs...... but they bolt in the same regardless. Keeps your 6 lug pattern. If you don't care about lugs the light duty 3/4 tons and 1500HD's from 1999 through 2007 have the 9.5" with 8 lug axles. They are different housings than the half ton AXN code version as those used 10 bolt wheel bearings at the end and 10 bolt axle flanges. Or you can even go back and get the previous body style ( 88-98) 6 lug 9.5" rear but they are narrower overall than the GMT800 rear ends and are generally a lot cheaper. If you want to weld perches and whatnot you can put any rear end you want in there lol. So many options.

Clay_Lucas · December 25, 2015

9.5" 14 bolt was available in the half tons under code AXN. It's harder to find as it was only used in the 6 liter and 6.2 powered trucks from 2005 through 2013. The 05 to 07 classic ones all have drum brakes and then the newer ones are discs...... but they bolt in the same regardless. Keeps your 6 lug pattern. If you don't care about lugs the light duty 3/4 tons and 1500HD's from 1999 through 2007 have the 9.5" with 8 lug axles. They are different housings than the half ton AXN code version as those used 10 bolt wheel bearings at the end and 10 bolt axle flanges. Or you can even go back and get the previous body style ( 88-98) 6 lug 9.5" rear but they are narrower overall than the GMT800 rear ends and are generally a lot cheaper. If you want to weld perches and whatnot you can put any rear end you want in there lol. So many options.

Will this work? Pretty cheap, leave me some money to get a decent locker.

http://seattle.craigslist.org/tac/pts/5355572304.html

Sent from my SM-N900T using Tapatalk

Badass69 · December 26, 2015

Anything works with a little handy work lol. Instead of rewriting it here you go!

http://www.performancetrucks.net/forums/gm-drivetrain-suspension-22/14-bolt-sf-swap-441553/

Sent from my SM-G900W8 using Tapatalk

Clay_Lucas · December 27, 2015

Ok. I'll probably have to look for one for this range of trucks.

Looks like a lot of work. I can get it welded easily, would I be able to keep the drums? Any issues with the proportioning valve?

I need something inexpensive (no way I'm paying $500+ for a 10bolt) that doesn't need to be modified too much. Don't really like drums, but they will work fine in the rear until I can do the swap, as long as they will actually work.

Thanks for the help. Looking forward to having a rearend I don't have to be worried about.

Sent from my SM-N900T using Tapatalk

Clay_Lucas · December 28, 2015

I'm picking that one up for $45 on tuesday, keeping the drums. As far as I know, all I need is the u joint kit and to move the spring mounts?

Sent from my SM-N900T using Tapatalk

Badass69 · December 28, 2015

Yep. And a conversion u joint like you already said. You will have to fiddle with the amount of pressure going to the rear if you are converting from disc to drum but that's just an adjustable valve away.

Sent from my SM-G900W8 using Tapatalk

Clay_Lucas · December 28, 2015

Yep. And a conversion u joint like you already said. You will have to fiddle with the amount of pressure going to the rear if you are converting from disc to drum but that's just an adjustable valve away.

Sent from my SM-G900W8 using Tapatalk

What do you mean by that? Is there already an adjustment I can do in the stock master cylinder?

Sent from my SM-N900T using Tapatalk

Badass69 · December 28, 2015

Discs and drums don't operate at the same pressure. A lot of guys have to dial pressure down to avoid rear wheel lockup going the other way ( drum to disc). You will have to see how it goes as those wheel cylinders should be pretty big in those drums.

Clay_Lucas · December 28, 2015

Discs and drums don't operate at the same pressure. A lot of guys have to dial pressure down to avoid rear wheel lockup going the other way ( drum to disc). You will have to see how it goes as those wheel cylinders should be pretty big in those drums.

I have an 05 rearend in it right now, using the PITA single spring drum system. They don't seem to work very well, but I'm fairly sure it's because they aren't bled very well and the drums are getting thin.

How can I adjust the pressure to the rear?

Sent from my SM-N900T using Tapatalk