8" 3.00 rear end - Vintage Mustang Forums

 
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post #1 of 10 (permalink) Old 05-12-2017, 03:33 PM Thread Starter
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8" 3.00 rear end

Where is a good place to find a 8" with a 3.00 posi rear end ?


It's going in a 1977 Mustang II
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post #2 of 10 (permalink) Old 05-12-2017, 04:06 PM
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Any junkyard, once you know the donor vehicle, model and year, and then know how to decipher the tag.

Careful with the term posi,....some members get bent, as Ford never made any posi traction rears.

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post #3 of 10 (permalink) Old 05-12-2017, 04:21 PM Thread Starter
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One of my cars has a 'Trac Lock' another has 'Twin Traction', another calling it 'Limited Slip' and I have a Mopar and I have no idea what they call there's.




However every one knows what I mean when I say 'Posi'






I have been calling junk yards, Car_parts.com and Mustang Specialties in Colorado, a 8" 3.0 Trac Lock is hard to find.
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post #4 of 10 (permalink) Old 05-12-2017, 05:26 PM
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There are usually multiple guys selling them on ebay.

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post #5 of 10 (permalink) Old 05-13-2017, 09:35 PM
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If it was an open rear, maybe $50. If a "posi" in good shape, then $300 or so.

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post #6 of 10 (permalink) Old 05-14-2017, 01:37 AM
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From what I've seen in my 50 years of junk yard shopping Ford was pretty stingy with the Traction-Lok differentials. Most commonly found in 9" pickup rear ends and of course the Boss and CJ cars which also have 9" rears.
In reality I guess it wasn't FoMoCo that was stingy with them but rather the dealers just didn't order them because they were optional equipment in just about any car Ford built.
You're just going to have to buy one new and assemble it yourself or pay someone to assemble it. They're close to $1,000 new on Fleabay already assembled.
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post #7 of 10 (permalink) Old 05-14-2017, 07:57 AM
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I would find a rear end that is the right width at a junkyard. Then buy a new ring, pinion, overhaul kit (bearings and seals), and a traction-loc. A guy on Ebay (Ron's Speed Shop) sells the kit which comes with Richmond Gears, a Yukon Traction Loc, and the overhaul kit all new for about $550. Or check your local supplier for pricing.
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post #8 of 10 (permalink) Old 05-14-2017, 08:22 AM
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if you just need a center section ,? this is the guy I used with no regret
http://stores.ebay.com/8-AND-9-INCH-...-TJ1141?_rdc=1

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post #9 of 10 (permalink) Old 05-15-2017, 11:07 AM Thread Starter
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The cars former owner put a 3.90 hog head in the car, Not too bright, the car has 185 70 13 tires, 4 speed and a 13 gallon fuel tank


One day I will change out the trans to a 5 speed, till then, I'll go with the original 3.0 gearing. I prefer a trac-lock because we trailer the car, the wife too often has traction problems climbing the ramps.
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post #10 of 10 (permalink) Old 05-15-2017, 07:47 PM
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Maverick, V6 pinto-Mustang II should have one. Traction lock is a bit tougher but they are out there in V8 MustangIIs

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