Transmissions and Drivetrain Need help with your trans? Problems with your axle?

auburn gear vs. eaton diff? Best one

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Old May 12, 2006 | 09:37 PM
  #1  
Matthew91-Z28's Avatar
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Joined: May 2002
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From: Texas
Car: 1991 Z28 Convertible
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: 3.23 with Eaton posi
auburn gear vs. eaton diff? Best one

That about sizes it up. Looking for a good posi unit for a street car. Auburn one is a little bit cheaper in price. Any pro's or con's going with one or the other?
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Old May 12, 2006 | 10:56 PM
  #2  
Coach Hawk's Avatar
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Joined: Aug 2005
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From: Evansville, Wisconsin
Car: 91' Pontiac Firebird
Engine: LT1
Transmission: 4L60E
Auburns are expensive to rebuild, and you must send it back to them. Eatons you can rebuild yourself at home for much less. Cone type(Auburn) vs clutch type(Eaton). GM used Auburns for many of their late model posi's, and many of them wore out much sooner than they should have. Also, Auburn does not offer rebuild services for many of teh factory diffs anymore. I can't help but wonder if the aftermarket ones could suffer the same fate.
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Old May 13, 2006 | 03:48 PM
  #3  
Matthew91-Z28's Avatar
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Supreme Member
20 Year Member
 
Joined: May 2002
Posts: 1,333
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From: Texas
Car: 1991 Z28 Convertible
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: 3.23 with Eaton posi
yeah...i figured the auburn sounded like the zexel torsen units 4th gens used. I liked the eatons more anyway.
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Old May 13, 2006 | 07:22 PM
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1984HO's Avatar
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Posts: 194
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From: NH
Car: 1984 Z28
Engine: LQ9 W/ Howards ASA cam+Fast 90
Transmission: T56 Mgw shifter
Axle/Gears: Currie 9inch w 4.30 gears
from my expeirince

i have an oem type auburn in my 7.5 and i bought it used and rebuilt it my self
by rebuilt i mean dissasebled it clean it thouroughly and scuffed the cone and case friction areas and reassemled it with new springs (i got them from auburn) and it works awesome. the only thing to make sure is that the cones have not worn to the point that they contact the case at the outside (opposite of the c-clips) because that means that they are worn too far to be used
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Old May 14, 2006 | 01:18 AM
  #5  
1991 RS/SS's Avatar
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Posts: 325
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From: Midwest
Car: 1991 Camaro RS
Engine: 383 LT1
Transmission: T56
Axle/Gears: 4.10
I dont know much about the Eaton units, but I am very pleased with my Auburn Pro. It hooks great and still corners like a dream. The Pro unit is a little more agressive than the regular Auburn and I imagine it will wear out a little sooner on a street car than the regular one. I have over 7000 miles on my Pro unit without any problems or signs of wear. I drive the car hard on the street on cruvy roads and also drag it on Friday nights.
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