The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - TDA-stamped rear end to posi conversion?

jcwren · 04-20-2019, 06:23 PM

I've got a 6-lug 3.73 open rear end in my '70 that I'd like to convert to posi. It's stamped with 'TDA 1001 W', which tells me it's 3.73 open, manufactured in Warren, MI on 10/01.

If I've decoded things right, this should be a 8.5", 12 bolt, 30 spline, type 3 housing rear end?

Can I just swap the open guts with posi guts, like an AuburnGear unit or thisYukon Dura Grip, and I shouldn't need to do anything to the housing or axle tubes, correct?

04-20-2019, 06:23 PM	#1
jcwren Registered User Join Date: Nov 2018 Location: Flowery Branch, GA Posts: 206	TDA-stamped rear end to posi conversion? I've got a 6-lug 3.73 open rear end in my '70 that I'd like to convert to posi. It's stamped with 'TDA 1001 W', which tells me it's 3.73 open, manufactured in Warren, MI on 10/01. If I've decoded things right, this should be a 8.5", 12 bolt, 30 spline, type 3 housing rear end? Can I just swap the open guts with posi guts, like an AuburnGear unit or thisYukon Dura Grip, and I shouldn't need to do anything to the housing or axle tubes, correct? Attached Images __________________ 1970 C10 LWB Stepside 1971 Dodge Dart 1993 Buick Roadmaster Estate Wagon Last edited by jcwren; 04-20-2019 at 06:31 PM.