> ----- Original Message -----
>From: "Ray Block" <bpracing@worldnet.att.net
>
> > -----Original Message-----
> > From: Dan Kramarsky
> >
> > I would like to replace my open diff with a posi unit so that I can
> > acheive better
> > performance at the local drag strip.
> >
> > I can get the Dana Trac-Lok for $220 or an Auburn posi for $415.
I'm looking to rebuild my Trac-Loc, but can not find a rebuild kit online.
I did some searching and found someone on another forum saying just the
clutches
and plates were around $220 from the dealer.
I guess I'll try searching the correct spelling, now that I realized I was
using
a C instead of a K....
Mine worked good for about 80K maybe less, now at 115K it's useless.
'99 9.25
> >
> > Which diff unit is going to perform the best at the track?
>
> For your power level and frequency of track use, either will be fine.
> Mopar
> has used both clutch and cone type differentials over the years. OE for
> your truck was a clutch type.
>
> The Auburn is a cone type. You CANNOT use synthetic lube with them. You
> MUST use a friction modifier. They are NOT rebuildable. But they work
> fine for limited track exposure. For your 8.25 only their Performance
> series is available.
>
> The Trac-Lok is a clutch type. You CAN use synthetic lube and many
> brands
> come with friction modifier already in them. It IS rebuildable.
>
> > And please help me understand what makes one better than the other in
> > terms of track performance.
>
> It's sort of a wash. For track ONLY you can't beat a spool but those
> shouldn't be used on the street.
>
> When ordering a diff, be aware your '92 8.25 rear uses 27 spline axles.
> They changed to 29 splines in '97.
>
> Ray
> http://www.dragtruk.com/ENTRIES/20KM1FD2KWBP.html
>
>
>
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