Hi Gary,
I believe that this is also caused by low hydraulic pressure in the
overdrive.
The pressure has to overcome spring pressure when "overdrive" is selected.
If the pressure is too low the cone clutch lifts off its "normal" position
but does not move all the way to the "overdrive" position and stays in
no-mans-land. When you apply throttle the unidirectional clutch provides
the drive but that only works when the engine is pushing the car, not the
car pushing the engine.
You should start by checking the overdrive oil pressure, it should be 470 -
490 p.s.i.....the seldom are that high.
Michael S
On Thu, Nov 8, 2012 at 9:05 AM, <warthodson@aol.com> wrote:
> Recently, I mentioned that my overdrive has begun to shift into OD more
> slowly. The shifts can take up to 3-5 seconds. This problem has progressed
> to
> the point that now about 50% of the time it does not shift into OD at all.
> When this happens I noticed an unusual phenomena. If I shift into OD, but
> the
> OD does not engage, and I take my foot off the gas, the engine RPM drops
> immediately to idle, even though the clutch is still engaged & I may be
> going
> 60 MPH. The RPM does not drop to idle if I am in direct drive & I take my
> foot
> off the gas at 60 MPH. So, apparently the OD has partially engaged but not
> completely. Does anyone know what is happening in this example? Obviously,
> the
> electrical part of the OD is engaging or it would act just like direct
> drive.
> I have not had an opportunity to check the OD operating pressure, but will
> soon. The transmission is full of the correct oil.
> Gary Hodson
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--
Michael Salter
*I have BJ8 water pump kits!!*
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