BADASS of New England

An automobile club for the enthusiast who enjoys the last of the big GM cars. The rear wheel drive B and D bodys. Chevrolet Impala SS, Caprice, 9C1, Buick Roadmaster, Oldsmobile Custom Cruiser, Cadillac Fleetwood
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 gov lok, eaton, or auburn?

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Posts : 146
Join date : 2009-05-09
Location : lakes region, NH

PostSubject: gov lok, eaton, or auburn?   Fri Jun 14, 2013 8:39 pm

I'm looking for a good used posi for the FWB I just bought from FL which will be delivered to me Sun or Mon. Smile  I was very disappointed to discover after I bought it that a FWB with the V4P tow package does not come with a posi ?!??! WTF?? I always thought one of the major parts of any tow package was a posi? ... Anyway, this is what I THINK I know about the three, lemme know your thoughts. I will be using the car primarily for towing my boats and not too much else, trying to keep it out of the rain as much as practical and definitely out of the snow and keeping it stock.

Eaton: original equipment, tends to burn out before it should
gov lok: rugged, doesn't really wear out, but I have one in the 9C1 noticed in that if I am already into a right turn and giver sum, it spins just the RR. If I giver sum from a stop in already into a left turn it has never let me down.
Auburn: don't know anything about it but it's supposed to be good.

I may have Eaton and Auburn reversed... Eaton is OEM right?

What would you gurus recommend for my application?
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Club President

Posts : 6878
Join date : 2009-01-20
Age : 41
Location : East Hampstead, NH USA

PostSubject: Re: gov lok, eaton, or auburn?   Fri Jun 14, 2013 9:04 pm

You have the eaton and auburn reversed. The Auburn is the stock, non-rebuildable posi. 

None of the Fleetwoods had a posi. You can thank the traction control system for that. Rolling Eyes

It depends on what you want out of the diff. If it's just for towing, the stock Auburn or GM Gov-bomb (gov-lock) from a truck would be fine. And cheap. Cheap and fine is good in my book. Wink

Drag racing? Eaton

Road Course and Autocross? Eaton Tru-trak

Bill "The Verb" Crovo - Resident Car Slut & Unicorn Hunter

A Toasted Marshmallow, A Long German, A Lame Suburban and expensive dreams...
Missing all my previous B's, D's and V... Sad
American Ricer
"Ooooh! Look! Something shiny!"

LOWER IT!!! Wink
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Matt Trakker


Posts : 5086
Join date : 2009-07-30
Age : 36
Location : Reading, MA

PostSubject: Re: gov lok, eaton, or auburn?   Fri Jun 14, 2013 9:23 pm

I've heard good things about the Detroit TrueTrac before, which I believe is made by Eaton.  I think Eaton made the Gov-locks for the Chevy truck 10 bolt rears which are known for Gov-bombing, which mine did.  I could be wrong about that?
However I think everything depends on the type of vehicle that they're going in where reliability is concerned...the 10 bolt is wimpy for a truck application.

I'm not positive but I think there is a TrueTrac or something in the DGGM.  It hooks up like crazy in most cases and definitely feels like something not-stock is in there.  I have to look into it.
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