> I hope someone can shed some light on this, I have a feeling it is
complete
> hyperbole, but today I heard of a amateur TR racer in the midwest who
claims
> that his J type overdrive has been converted to a P type (P type
internals,
> uses J type case). Apparently he is now able to use OD in all forward
> gears, and says OD engagement is instantaneous.
Well I have tracked down more information on this conversion, in large part
on a tip from Don Clark!
It is available from Medina Motorsports, 1-800-700-7057 or racing@ohio.net
They take your overdrive unit (A type, J type, whatever) and rebuild it to P
type spec which is essentially an industrial variant of our overdrives. The
major difference is that the clutch material is completely new and not the
same as used in our overdrives, and that is what really gives this P type
overdrive it's strength (along with other uprated components they put in).
Hydraulic pressure is also increased to 750lbs through larger pistons, and
they put a heavier duty solenoid in. Cost is $1200, for the fully rebuilt
and converted overdrive unit... that price is if you supply the OD unit to
them. With this conversion, the OD can take "anything up to 1200hp"...
again, just the OD unit (not your entire gearbox).
John is a very nice guy, they've also got some other TR performance items
although pretty pricey... like indestructible lighter tappets/lifters for
$65 a piece. Too expensive for my motor.
Cheers,
Kai
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