The gearbox is an A727 behind a 440 motor in a 1973 Jensen Interceptor.
My box has developed an annoying problem. When the box is cold I can't get
any forward gears although reverse works perfectly. If I hold it on the
brakes and give it a few revs in reverse for a minute to warm the oil up
it
suddenly starts working normally, whereupon it then works perfectly for
the
rest of the day.
The fluid is new, (and clean) the filter is new and the oil level is OK.
When the gearbox is working normally it behaves perfectly without a hint
of
any problem.
I've studied the schematic and 'elements in use table' in the Chrysler
workshop manual and have decided that the problem must be connected with
the
rear clutch, probably sticking. I can't see any problems with the valve
block, because in drive and stationary, oil is ported straight through the
manual valve (which can't stick because it connected to the selector
lever)
through to the rear clutch. Oil pressure must be fine because it drops
into
reverse perfectly.
Would anyone care to comment on my diagnosis, is there anything that can
be
done without removing the box and has anyone rebuilt the gearbox
themselves?
Thanks Julian.
