http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=1875306677 Good price? does it sould like a good product? Looking for opinions. Thanks Russ
a good posi unit will cost you about $400-$450 new, ring & pinion about $180, and bearing set about $100 to $125. So that is a good price for a fully assembled unit with all new parts. You have to figure shipping in too. Be aware that picture is not a picture of a posi unit. Make sure the one your bidding on, is. My opinion is I wouldnt waste my money on clutch type posi units, like Ford's Trac-lock. I never had much luck with them lasting back in my 4 wheeling days. I have the Auburn pro in my 77 (it was a freebe w/3:55's)which is a cone type. I dont have many miles on it to give you an honest opinion but it is a noisy sucker when cornoring even though I put in twice the friction modifier. MY detroit locker in my Sprint is the one I'd spend the money on.
IMHO, you need to find out more info.Some of the wording in the ad troubles me. "THE POSI UNIT IS A LIMITED SLIP, WHICH HAS FOUR COIL SPRINGS SAME AS THE FORD TRACTION-LOCK, ", Does not mean that it IS a Traction-Lok, nor that it FUNCTIONS like a Traction-Lok. It just means they both have 4 springs. "THE POSI IS MADE BY US AT MAE." Just what does this mean? Does this mean that they CONVERT an open unit with something of their own manufacture? Not that that is necessarily bad, but I would want to know EXACTLY what I was buying. Traction-Loks use spider gear side thrust to add compressive load to the clutch pack, and don't depend on just the static spring load, so the 200ft-lb breakaway figure quoted is slightly misleading. I would wager that they have made a deal that puts spring pre-load on a small clutch pack, like GM, and that fits inside an open 8" carrier, which are basically, free. And they are asking a price in line with a Ford Traction-Lok. For the other side of the coin, I have had very good luck with the Traction-Lok, used in 11 second street/strip cars, and even in some of our early circle track cars.
I love my 8-inch Trac-Lok. It's easy to replace clutch packs if & when they wear out....Cone type differentials are NOT rebuildable...
This is a posi of their own design. I used to have one years ago in my 73 and just recently ordered one for my 72. They are building me a 3.25 4-pinion posi (want decent hiway RPM's) - they told me it should be as strong as an Auburn but not a Detroit locker. It is recommended for a Street Car with some track use and not be beat on all the time. The total cost with the 4 pinion option and shipping was $570. That may be the actual picture - I assume they are altering open differentials to be posi ...
Going along with the original question, what locking differential would you guys suggest for my Mav? It has a 5.0 and a C4 with a shift kit, and since I did the swap from the old 302 it has become too unstable to use the old open rear. I was thinking a Limited Slip (Or whatever it's called...Traction Lock?), like in most Fords these days, but now with all this talk, I don't know what to use. This car is a street car, but an occasional trip down the strip might be fun (Nothing serious). Anyway, I would like a nice, quiet, reliable, "locking" rear end for my application, so the back of the Mav is a little more firmly planted to the ground when it's wet. Even the upholstery guy agreed with me... after it fried the tire when he moved it into the shop! Accident, but according to him it burst into smoke (tire). Thanks all. -Corbin
Well you're going to get several different suggestions...and they all work (anything but a spool on the street). The Factory Ford Traction-Lok works great. So does the Auburn as well a s a few others. With the Ford unit, you must use a friction modifier with the gear lube. Although the Auburn is not rebuildable, it can actually outlast the rest of the car if not badly abused. You need to figure out what your budget for the rearend is and go from there...
Corbin, the standard Ford traction lock is fine for you stated purpose. The 8" uses most of the same internal parts as the 9" including the same friction discs. Look this website for more info on what cars to look at for a possin ble unit www.mustangii.org/decode/axle/
Hey, thanks for the conformation guys! Also, thanks for the website. Now all I need to do is find one sometime. I am glad there are people like you guys in the world. Thanks again, and I'll let you know what happens. -Corbin P.S. Here is the link: slight typo http://www.mustangii.org/decoder/axle/
