I'm pretty happy with my Auburn Pro Series and 4.10 setup.  It locks up great and is smooth/quiet.  Mine is a 12 bolt with Superior axles and I completely rebuilt it.
 
I broke the stock carrier.  The spider gears grenaded while stalling up for a launch.


From: Gene Smith [mailto:[EMAIL PROTECTED]
Sent: Sunday, December 04, 2005 1:17 PM
To: The Chevelle Mailing List
Subject: Re: [Chevelle-list] Ring and Pinion Auburn vs. Eaton

Hi,
 While on the subject of rear axles, which is better, the Auburn cone style posi or the Eaton clutch style? I am beginning to lean toward the Auburn unit.
 
 I know the 8.2 10 bolt is not the best, but will a beefed version be at least as good as a stock 12 bolt? I am planning on going with all new innards with 3.08's and aftermarket c-clip axles and a girdle type rear cover. I'm still going to have about $1,200 in it. The 3.08 are temporary as I am saving toward a Gear Vendor unit in about two years from now, then I will go with something in the 3:42 - 3:90ish Range.
 
 It also stands to reason that the 8.2 would allow for less parasitic power loss and be quicker and return better gas mileage due to the lighter weight of the internals. But since the ring gear is smaller in diameter, the pinion would have less leverage so theoretically it would probably equal out...or only be marginally better?
 
 Is anyone out there running an 8.5 10 bolt?
 
 
 
Thanks,
Gene,
----- Original Message -----
Sent: Saturday, December 03, 2005 2:16 PM
Subject: Re: [Chevelle-list] Ring and Pinion

A built 4L80 auto can easily handle well over a 1,000hp. One of those or a Gear Vendors would work fine.
Gearing becomes less critical the more hp & tq you have. Your car would work great with a 3.08 cog.
Clint Hooper
H&H Custom,owner
1969 El Camino ProTourer
2001 H-D FLHR custom bagger
http://dalesplace.com/misc/friends/clint/clint_hooper.htm
----- Original Message -----

The other problem is, running over 700HP. I doubt many overdrive tranys can hold up, to that much abuse!

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