In a message dated 3/14/00 1:17:22 PM Pacific Standard Time,
jforbes@primenet.com writes:
> Mike--
>
> I think the posi was quite rare, probably installed in less than 5% of
> the 59 Chevy half tons (just a guess).
>
> This early posi doesn't have springs preloading the clutch plates...so
> it is supposed to be loose. When you apply torque to it, the forces on
> the spider/side gears force the side gears out, and compress the
> clutches.
>
> Value is hard to determine...since there aren't any other gear ratios
> commonly availble for it, you can only use it with the 3.92 ratio, and
> most folks today seem more interested in highway gears. The gears are
> different from the Dana 44 rearend, I checked...
>
> I probably would not take less than $500 for my 59 posi rearend, but I'm
> not motivated to sell it. I know I can spend more than that replacing
> it with something else.
>
> Jim
Thanks for the info Jim,
You know I wondered about whether the posi was worn or not, I pulled the
diff. cover myself several years ago to see what it loked like inside, and
there was very, very little grunge in the bottom, I wiped it out, put the
cover on and refilled it.
While I had it in the air running, both tires spun, then with one on the
ground, I could spin the opposite by hand, and notice just a little drag
(maybe 10 ft/lbs or so), I just figured it was worn.
Also it's good to know it may be worth something, I'd have a hard time
asking $500.00 for it though, but......
Mike
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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