Another Rear-Diff, Axle and Posi Question... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Crispyr1 · 11-24-2016, 01:41 PM

I know there are plenty of threads talking about the different carriers to use and which will go into what, but I haven't found one that answers my questions specifically.

So I have came to a place where I need to replace both axles due to being bent and I have bad wheel wobble, so I figured while I'm doing that I may as well make it posi.

I have an LS motor with the 4l60E tranny going to a 12bolt. What do I need to make my truck have posi(ie. carrier, bearings...), and what do I need to replace while i'm replacing the units(anything that will be needed to make it fit or stronger). And lastly if i'm getting a 30 spline LSD then I just need 30 spline axles correct? What about lengths?

**kwmech** · 11-25-2016, 01:40 PM

Assuming a 12 bolt rear diff and a small block I would lean towards a True-Trac

Crispyr1 · 11-27-2016, 02:29 PM

Awesome.

11-24-2016, 01:41 PM	#1
Crispyr1 Registered User Join Date: Jul 2009 Location: Orange Park, FL Posts: 114	Another Rear-Diff, Axle and Posi Question... I know there are plenty of threads talking about the different carriers to use and which will go into what, but I haven't found one that answers my questions specifically. So I have came to a place where I need to replace both axles due to being bent and I have bad wheel wobble, so I figured while I'm doing that I may as well make it posi. I have an LS motor with the 4l60E tranny going to a 12bolt. What do I need to make my truck have posi(ie. carrier, bearings...), and what do I need to replace while i'm replacing the units(anything that will be needed to make it fit or stronger). And lastly if i'm getting a 30 spline LSD then I just need 30 spline axles correct? What about lengths? __________________ '68 C-10 SWB LS 5.3L, 4L60E, 3:73 posi, Dakota Digital HDX Gauges, Boss 338's 18's front 20's rear. 3"/5" drop.

11-25-2016, 01:40 PM	#2
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,628	Re: Another Rear-Diff, Axle and Posi Question... Assuming a 12 bolt rear diff and a small block I would lean towards a True-Trac

11-27-2016, 02:29 PM	#3
Crispyr1 Registered User Join Date: Jul 2009 Location: Orange Park, FL Posts: 114	Re: Another Rear-Diff, Axle and Posi Question... Awesome. __________________ '68 C-10 SWB LS 5.3L, 4L60E, 3:73 posi, Dakota Digital HDX Gauges, Boss 338's 18's front 20's rear. 3"/5" drop.



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