[bigm71]

What's the most economic way to upgrade my 8" rearend to positive traction?

[heavy metal]

You can go with a spool setup if you want 100% posi all the time.

[Dustysdawg]

There are a few choices:
Find one in a junk yard. Good luck.
Or, buy the limited slip unit from a local auto parts swap meet. Then buy a manual on how to set it up. Then do it yourself. People on this forum can guide you along. It does require some special tools to set backlash.
The safest economic way to do it is to find a complete rebuilt third member with limited slip at the local swap meet. Not sure what this would cost in NC, but a LS 9" can be found for $400-$700 out here in CA.
Also, ebay or craigslist might work.

[andrewmp6]

A spool should only be used in a drag only car.

[The Greek]

The 8" limited slip or "Posi" units are an extremely rare find in a factory set up. The aftermarket has them for a price, they ain't cheap. Companies like Currie, Moser, Auburn, Eaton and Strange may offer what you need. The performance market concentrates on the 9" and the 8" is more like an orphan.

You definitely don't want to use a locking spool. These are for straight line use only. You will run into huge problems with one on the street.

[66 restomod]

on ebay, 600 dollars rebuilt, from a shop

eBay Motors: 8 inch Ford posi traction rearend (item 120324920989 end time Dec-23-08 13:18:57 PST)


Custom built 8 inch Ford posi traction rearend: Send us your center section and we will rebuild it and add a posi unit. Choice of gear ratio 2.79-3.00-3.25-3.55-3.80-4.11-4.62. Motive gears-Timken bearings. All posi units are tested to 200 plus ft lbs break away torque. This will pull both tires equally yet slips enough to make turns easily. Good for the street and occasional Drag Strip. A limited slip unit make hear in the USA by MAE Racing Rearends. Featuring Steel friction plates for better grip and longevity. Comes with a one year limited warranty. Approx. 7 day turn around time. Fully assembled by a professional.

[lfisher]

Originally Posted by bigm71

What's the most economic way to upgrade my 8" rearend to positive traction?

I just put an auburn in my 66 stang. It was the only thing available to me. The box said it would fill all 8in gear ratios. It will not fit a 2:80. It works great !

[mccance]

another option would be to add a "lunchbox" locker like a lock-rite to your existing carrier.eBay Motors: FORD 8 INCH 28 SPL LOCK RIGHT LOCKER FOR OPEN CARRIER (item 120391527894 end time Apr-12-09 09:57:10 PDT)

[Dave]

I've used one of the "Lunchbox" lockers in my Ranger for over 30K miles. The "LockRight" is the tough one. I'm using the "No-Slip" that is for more steet orientated use. Easy to install in the driveway. No having to set the gears up or anything, takes about two hours to do. Runs about $480.
Dave

[jspagna1]

I've bought gears and rearend parts from these guys. Very reasonably priced and good quality:

DTS - Drive Train Specialists

[mustang402]

I'm doing this right now on my 67 coupe> purchased my 3rd member on ebay 3.55 yukon gears and a Currie carrier with a reputable shop (rmustangs) in SF. Cost $791.00 I will also be installing new bearings, seals, and gaskets, Total= $839. I know it's not cheap but I have a year warranty on the pumkin. HTH