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Old 09-25-2007, 12:23 PM
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Eaton Posi

ok i know this has been talked about time and time again. ive read a fair share of threads about this. but they didnt fully answer all my questions.

i own a 70 elky it has a 350sbc with roughly 400hp+. i currently have a 10bolt 8.2 28 spline open rear end with 2.56 gears. i would like to upgrade to a posi mainly for traction and 3.73 gears. i have heard many good things about an eaton posi from moser. what i would like to know is what should i upgrade to make it last a long time and hold up to abuse. i will be running BFGoodrich Radial T/A tires no slicks or really sticky tires.

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Old 09-25-2007, 09:46 PM
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Eaton makes a good posi unit. Use a 3-series posi carrier with the 3.73 gears. If you plan on driving it on the street, get Moser's C-clip-type axles. C-clip eliminators are leaky, and the Moser guy I talked to said they won't break nearly as easily as stocker. A rear end girdle such as TA Performance's TA-1807 would also help keep it together.

Weld the axle tubes to the center section, all the way around. They're just pressed in, and they'll slip around and cause leaks and all kinds of squirrelly stuff if you hit them with any kind of sudden load. Be sure anything welded to the axle tubes by the factory is FULLY welded and not just tacked here and there.

Operator education: avoid neutral drops or clutch side-steppage.
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