TRACTION CONTROL

[Greg Hermann]

>On Fri, 13 Nov 1998, Raymond C Drouillard wrote:
>
>> You are correct.  The classic Borg-Warner Quadratrack (TM) transfer case
>> used a preloaded clutch similar to what is used in positraction
>> differentials.
>>
>True. Dont forget "Positraction" is Chevrolets marketing name for a LSD.
>Over the years they have used various types so the term does not specify
>any specific brand or type, except maybe the Powr-Lok which was the one
>they were using when marketing thought up the name.
>
Negatory on Powr-Lok. That started out patented and trademarked as the
Thornton Powr-Lok. Thornton was a Brit. firm. First got swallowed by
Salisbury, Then Salisbury (also Brit) got swallowed by Dana-Spicer. DAMN
fine unit, likely the best clutch type limited slip (possible exception to
Auburn gear's unit) ever made-but expensive. Not to be confused in any way,
shape or form with  American made "Trac-Loks", also available from Spicer,
some of which now seem to be using "Power-Lock " (note sp.) as an alias
(see Dana 80).

More stories available on folks like Browne , Lipe, others and why
auxiliary trannies are known as "Brownies".

The original Quadra-Trac used a cone clutch type limited slip, which was
prone to chatter BADLY if anybody ever got the least bit wrong oil into
it!! Not all that good a unit.

Regards, Greg