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Best Drag Racing Posi???

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Old 04-21-2005, 04:54 PM   #1
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Default Best Drag Racing Posi???

The posi is starting to go out, so I will be replacing it before I make any trips to the track this year. I am looking at the Eaton or Auburn Pro Series, but would like to know what would you drag racers recommend? (Other than real rearend, the heads are going in first, then the rear.)
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Old 04-21-2005, 05:27 PM   #2
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IMO you're fighting a losing battle running a posi in a drag race application. My Eaton posi in the 9" lasted about 50 passes with BFGs before it quit posi-ing. Depending on how long till you do a rear upgrade I'd either get a spool for the current 7.5" rear or a complete used 7.5" posi axel assembly. Just my opinion.
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Old 04-21-2005, 05:34 PM   #3
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If the rear goes out this summer, I will do it then. However, if it holds up through the summer, that will be my next winter project.
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94 Formula N/A, untouched stock heads, stock bottom end, stock rear end, 4.10s, long tubes, CC306, CAI, Vig 2800 stall TC, Pro-Built Automatics "Limited" Street 4L60E.
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12.05@113.29 1.700 60'
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I WILL NOT let a ls1 surpass a lt1 if I can help it...
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Old 04-21-2005, 07:54 PM   #4
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Quote:
Originally Posted by Mark98SS
IMO you're fighting a losing battle running a posi in a drag race application. My Eaton posi in the 9" lasted about 50 passes with BFGs before it quit posi-ing. Depending on how long till you do a rear upgrade I'd either get a spool for the current 7.5" rear or a complete used 7.5" posi axel assembly. Just my opinion.
the posi in my 9" lasted through probably 20-30 passes and 2 years of daily driving. I now daily drive a full spool.
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Old 04-21-2005, 08:29 PM   #5
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Just take your rear end cover off and weld all the gears and rollers in the posi together. Its free and now you'll just start breakin axles.
THERE IS NO REPLACEMENT FOR A SPOOL>
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Old 04-21-2005, 09:00 PM   #6
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detroit locker is a good option! it stays locked will going straight and unlocks when you turn,better street manners than with a spool my .02
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Old 04-21-2005, 10:30 PM   #7
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1.27 60ft with an Eaton here


Dozens of 1.2x 60ft over a 2 year period.
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Old 04-21-2005, 11:07 PM   #8
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No Problem So Far From The Auburn Pro Series Locker That I Have. I Used It In A Car That Did 1.44 - 1.48 60' Times With No Problem. Now It Resides In The Camaro That Cuts Much Softer 1.65 - 1.70 60' Times. I Have Torn Up Two Mini Spools In The Past And Did The Weld Up Thing For A While. Just Avoid The Trouble The First Time, Do It Right And Forget About It. (unless You Like Spending Your Weekends Off On Your Back Changing Out Broken Carriers).
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Old 04-21-2005, 11:07 PM
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