Years ago when starting on my TA I talked to Tom at Tom's Differential's(RIP) about axles. He said the stock posi will break first. The Eaton posi comes in 28 or 30 spline and 30 spline axles for a 10 bolt-thinner C clip "button" than 12 bolt axles. In my 3750lbs TA (when I had the light wheels on it) ran high 10s an I have an Eaton 28 spline and factory axles! MPH shows 550-575 HP depending on whose calculator. It is getting 30 spline axles and spider gears when I freshen it this winter. Factory yoke uses a 3R U joint and it is almost as big as a 1350.
Seen some in the 9s with spools as Paul said even with a heavy spray hit.
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Skip Fix
1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever!
1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand
1965 GTO 4 barrel 3 speed project
2004 GTO Pulse Red stock motor computer tune 13.43@103.4
1964 Impala SS 409/470ci 600 HP stroker project
1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs
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