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Old 08-07-2018, 11:18 AM   #1
jorgensensc
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Join Date: Jul 2003
Location: Cypress, Tx
Posts: 4,005
Rear Differential Question

Hey guys and gals,
Been awhile but I have a quick couple of questions for my Gurus out there. I am replacing my '72 C20 Suburban coil spring Dana 60 rear differential with a 2003 11.5" AAM rear differential with disk brakes from a Silverado 3/4 ton. I already took off the spring perches and the shock mounts and purchased the new trailing arm pads from captainfab. I've got a few questions for you guys.

1- Has any body else done this, and do you have any pointers or advice?

2- I know there is a residual valve built into the factory proportioning valve on the '72. do I need to change out the Prop Valve for a Disc/Disc prop valve, or can i just run the brake lines right off the current Master Cylinder and bypass a prop valve all together?

3-Does anyone know the adapter size I need to go from the AAM brake hose to the factory '72 brake hardline?

4- I wil need to get a new Panhard bar bracket, any suggestions?

5-My Dana 60 pan hard bar mount has an ear on the diff housing itself, so I can't reuse that. I think the '72 C20 with optioned Eaton Rear has an actual welded on bracket. It appears the Panhard bar is longer on that rear than on the Dana 60 Rear diff. Am I wrong? Does anyone have the two different Panhard Bar measurements if they are different?

5- If using an aftermarket Panhard bar, any recommendations for one that will be long enough?

Thanks for all of the help! I need to get this thing swapped before my howling rear explodes!

Shawn
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'56 Chevy Bel Air Sedan- Frame up Restoration

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