Thanks Allen. I have now done quite a bit of research, but you have brought
up a few new wrinkles. I do deal with John already.
What bearings need "uprating"? I thought them to already be quite stout.
The major issues seem to be with the clutch cone [get it redone with a
surface that grips better] and pressure [increase it so shifts happen
quicker and engagement remains at speed]. for pressure, there have been
three responses:
Remember, this is for a J-type, not an A-type]:
1. To hold pressure when not engaged [like coming off the line in a standing
start], shorten the 4 inner springs of the operating pistons so it takes
more pressure to release to overdrive.
2. For pressure:
a: increase the spring rate of the pressure relief valve bu adding a
washer or two under the spring
b: drill out the "oil passage". Not sure which passage but assume it
is the one from the solenoid to the dash pot -- would like a comment on this
from anyone who knows
c. Get the clutches on the cone relined
Does anyone have anymore suggestions?
On 10/17/07, Allen Washatko <awashatko@wi.rr.com> wrote:
>
> Chuck,
> Try Quantum Mechanics - John Esposito (203) 459-9612. He is a British
> transmission and O/D expert. He can rebuild your O/D to full race
> specs. He is reasonable, honest and a very helpful guy. To shift faster
> you will need to drill out the oil passages to increase the pressure
> and you should install upgraded clutch packs. There are several
> bearings that also need to be changed to handle the higher level of
> stress. I'm running about 600 lbs. of pressure in mine and it shifts
> very quickly!
>
> Allen
>
> On Oct 15, 2007, at 10:09 AM, Chuck Arnold wrote:
>
> > Sorry to some of you whom I may have asked this question directly. I
> > seem
> > to keep losing answers.
> >
> > I have j-type ODs that will use in racing -- shifting at about 6000
> > rpm. I
> > am rebuilding two units this winter. Want to know what people have
> > done to
> > increase the pressure in the j-type system. Also what has been done
> > to make
> > shifting in and out quicker?
> >
> > Will share the responses and write an article on my endeavors. Anyone
> > have
> > good links for OD repair/enhancement?
> >
> > Thanks
> >
> > --
> > Chuck Arnold
> > _______________________________________________
> > http://www.team.net/donate.html
> >
> > awashatko@wi.rr.com
> > Fot mailing list
> > Fot@autox.team.net
> > http://autox.team.net/mailman/listinfo/fot
> >
> >
> A l l e n W a s h a t k o
> 1971 TR6 - Number 6
>
--
Chuck Arnold
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