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Old January 15th, 2011, 10:18 AM   #1 (permalink)
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12 bolt oldsmobile positraction unit for sale

12 bolt oldsmobile 12 bolt cover 10 bolt ring gear

this is a brand new trac lock unit clutch type that will replace your 3 series carrier open or worn out 671 carrier posi unit.

This unit will hold factory 3.08 3.23 and aftermarket richmond 3.42, 3.90 and 4.10 ratios.
This unit can hold factory 3.42 3.91 4.33 4.66 with a spacer that we can supply also.

28 spline unit (most common) 419.00
CARRIER BEARINGS ARE 40.00 EXTRA AND INCLUDE MATCHING RACES

call for more info on this unit or pm

jim
330 659 7117
richfield, oh
Attached Images
File Type: jpg 12 bolt olds otype posi J D RACE 001.jpg (53.4 KB, 64 views)
File Type: jpg 12 bolt olds otype posi J D RACE 003.jpg (48.3 KB, 45 views)
File Type: jpg 12 bolt olds otype posi J D RACE 004.jpg (50.2 KB, 48 views)
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Old January 15th, 2011, 08:44 PM   #2 (permalink)
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That's purdy! What diameter shaft does that have? I like the ring.
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Old January 19th, 2011, 04:42 AM   #3 (permalink)
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olds 12 bolt posi units

It is 28 spline unit but I have 31 spline units and eaton units and even true trac units being made.

I am even doing lower cost reconditioned unit for the guys that just need a driver posi instead of everything brand new. Tried to cover all the bases with as much money as I could hang out there for a small business guy.

I had a machine shop do the ring and drill the holes for the units .... As I always say let people do what they do good. I am not a machinist...lol JIm

I am trying to supply these for way less than the SCU .... that is just too much money and these rears deserve to be back on the road...

Jim
J D
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Old January 19th, 2011, 05:14 AM   #4 (permalink)
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Is that a Ford 8.8" unit?
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Old January 19th, 2011, 06:22 AM   #5 (permalink)
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It's good that Eaton changed their carrier design.I had a few machined a few years back,and have all the specs to do more.With those I can do 28 or 30 spline.I even did one with 33-spline.I put this in a Vista housing,with the bigger SET 10 axle bearings,and Mark Williams was the only one that could cut me the right axles.It looks pretty ignorant.I did it for myself.
The newer Ford units are nicer too,and now I can put the good Eaton 10-bolt/12-bolt chevy style clutch packs in them.

That's a great price on a unit guys.I might just buy that myself,as sometimes it takes my machinist awhile to get these done for me.
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Old January 19th, 2011, 09:22 AM   #6 (permalink)
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8.8? modified

Quote:
Originally Posted by fast67vellen2o View Post
Is that a Ford 8.8" unit?
Yes modified to fit the 12 bolt olds rear end 28 or 31 spline.

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Old January 19th, 2011, 09:22 AM
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