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Old 10-01-2008, 06:21 PM
zak zak is offline
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need info on gettin a new posi trac

I have an '86 c10 with an open trac 2.73 rearend, but i want to go 3.73 posi trac. unfortunately i dont know how to even start ooking or really what to look for, if you guys got any suggestions that might point me in the right direction i'ld appreciate it

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Old 10-01-2008, 07:09 PM
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Quote:
Originally Posted by zak
I have an '86 c10 with an open trac 2.73 rearend, but i want to go 3.73 posi trac. unfortunately i dont know how to even start ooking or really what to look for, if you guys got any suggestions that might point me in the right direction i'ld appreciate it
Should have a 8.5 10 bolt, 28 spline axles, Eaton part#19557-1,when you order a brg kit make sure and get a Ra321DMK, or equivalent,Make sure the kit has LM102949 and LM102911 carrier brgs in it,The eaton posi uses a larger brg hub to take care of the weaker stock units with the smaller brg hubs.Add a gear set for a GM 10 bolt 8.5 ring gear. Add 2 #6408 axle brgs and 2 8835s axle seals and you have all the stuff you need.you can always shop ebay or the mail order guys and see who has the best price.
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Old 10-01-2008, 07:15 PM
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Dont forget to check the brg surface on your axles,If they are worn, now would be the time to replace them.

Superior Part#5694
Oem # 14035542
31 3/8 long "face of flange to end"
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Old 10-02-2008, 02:20 AM
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The best prices I've found were here. Plus Meet or Beat Pricing & Free S/H.
They give discounts on package deals. I bought a 12Bolt-P Chevy package = Yukon Dura-Grip 3/Series Posi, Ring & Pinion, Solid Pinion Preload Spacer, Master Install Kit, Axles, Bearings & Seals with Richmond Rebuild Video for $800 Shipped.
http://completeoffroad.com/

http://completeoffroad.com/c-59835-g...ring-gear.html
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Old 10-02-2008, 02:40 PM
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Looks like complete offroad has some good prices.
http://www.ringpinion.com/PartCats.a...iffName=GM+8.5
Here's another link so you can price shop.
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Old 10-06-2008, 09:18 PM
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Whatever you do, don't get a Gov-Lock.

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Old 10-07-2008, 12:31 PM
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Quote:
Originally Posted by prostreet6t9
Dont forget to check the brg surface on your axles,If they are worn, now would be the time to replace them.

Superior Part#5694
Oem # 14035542
31 3/8 long "face of flange to end"
If you are going to replace the axles too might as well get a 30-spline diff and axles. GM switched to 30-spline around 89.
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