From:
nt664_REMOVE_532760_THIS_@yahoo.com
What you are talking about is not traction
control but a limited slip differential (LSD). There are
a few basic designs all with pros and cons. The
basic unit is the clutch type found in stock
positraction and Ford Trac-Lok units. These are very cheap but
the clutches typically wear out in about 20K miles
under normal city driving situations. They sense a
difference in torque and the clutches slip accordingly. The
next step up is the Auburn type cone units. These are
reasonably priced and perform great at the drags. However
they can be noisy on the street when turning which
limits their road racing ability. Up from that is a
helical gear torque sensing LSD. These are marketed under
Power-trax, Torsen, etc. They sense differences in torque and
apply power accordingly. They are great for off-road,
road racing, and will give you the fastest drag times
next to a spool or locker rearend. They are priced
high but it is a design used a lot in road racing and
high end production LSDs. They use the differential
fluid to opperate and will heat it up a lot during
extreme driving, lowering the viscosity and performance.
In extreme cases, they can actually ignite the fluid
in the axle so for hardcore road racing it's advised
to run a diff fluid cooler. The high end for LSD's
is the GKN Viscodrive coupler. It uses its own
silicon fluid to drive an internal pump and senses
differences in wheel speed. They aren't as fast at the drags
but will kick but at the road racing. They are used
in Lamborghini Diablo, Porsche Carrera 4 Turbo, etc.
These will cost way too much. The last step is lockers
and spools. Lockers are either on or off (both wheels
locked like a solid axle or no power going to either
wheel like on turns). Spools are both wheels locked all
the time and it doesn't really work on the
street.
While I don't have a lot of experience with all
these units, I do know the theory behind all of them
and that the auburn cone unit will make some freaky
noises on the street. Hope that info is helpful and
please provide any feedback about which unit you chose
and how it performs. Thanks
Elliot
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