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Old 01-25-2002, 04:46 PM
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Post Which Posi unit to buy?

Any body out there have experience with the Powertrax sytem? Do they ratchet in turns? What posi unit would you recommend, Eaton, Auburn, Moroso, Powertrax? I'm not a racer, just a fun loving tire shredder. My motor makes a little over 400hp, light truck, 2000 stall, Th350. I will appreciate your thoughts.

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Old 01-31-2002, 08:21 PM
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Street anything, as powerful as you want- EATON. Pure baddass, race car- DETROIT LOCKER. Nuff said.
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Old 01-31-2002, 09:00 PM
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what about the powertrax??? I've heard they are stronger then the eatons? anybody have any feed back on them?
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Old 02-03-2002, 01:25 PM
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Technically, and by theory, I can't say. But we've broken those units in vehicles where the eatons that replaced them don't. It does not in any way mean it's a bad unit, just not in our field experience considered superior to the eaton's-and the eaton is totally rebuildable. I don't know much about offroading, but the eaton, as compared to the locker, is a bit cheaper, and daily-driver friendly.
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Old 02-03-2002, 01:45 PM
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yea there are a lot of debates that go on regarding this stuff, and I've seen plenty of them. I had forgotten that the eaton is rebuidable, but that has got to be a hugh advantage.

unless your are going with a locker what you are getting is limmited slip... in a 4x4 application you have scenario's where you'd have one wheel off the ground. at this point the differnt is hugh.

the powertrax is suppose to have better on-road behavior. i.e. lookers give ya tire chip, limited slip gives ratcheting sound in corners. powertrax is suppose to be much quieter...

I think I'd opt for the option of having something that was rebuildable. I think the Auburn is suppose to be rebuildable too, and either the Auburn or Eaton has springs you can change out to make it lock either easier or harder.
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Old 02-04-2002, 11:21 AM
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The auburn is not, and never was, rebuildable. We've installed a bunch of them, with no troubles, but you need to know that the auburn design is that of a metal cone inside a metal cone, and when it's worn out, it works less well, to the extreme, where the c-clips fall out(seen it). The eaton's are superquiet with the stock 400# springs, as long as the posi additive is used, and the fluid is changed every 15-30k miles. What seems to happen alot is that folks forget about the fluid change, and that's alright with a junk oneweelpeel, but the "posi's" need actual maintenace. One of those guys is a trutrac, I think, and has 4 work gears in it, and beach friends of mine swears by them in jeep sand cars.
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Old 02-05-2002, 02:53 PM
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I want to give you some feedback. First, thanks for the help. I was on another board with this question and got an e-mail from a rep at Powertrax that made me an offer I couldn't refuse. He sold me a unit that retails for $400+ for $275 direct from Powertrax. So I am going to use the Powertrax. He claims that it will handle 1000 hp. In a chart that I found at a local 4x4 store, I found that the unit I am buying (8.875" GM 12 bolt) will handle 15000 ft lbs of torque per axle which is about 3x what the axle will handle. They claim that there is absolutely no ratcheting in the turns. They are also reubildable. So, I will give you a report after I get it in use. I was biased against them when I looked at the unit in hand, but I am going to take the risk. I guess I can be bought for $125!
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