Why not run it on axle stands with the transmission cover off, then
you can manually shift the lever. There is a distinct resistance at
the point right before the ball lifts off its seat caused by the
pressure acting on the ball which you won't feel when stationary. A
weak solenoid that appears to work when stopped may not overcome this
extra resistance. If there is no resistance point then there is likely
no pressure.
The Buckeye Triumph website has a very good writeup of OD issues. I
don't believe there is any passage in the OD that can be cleaned out
with a wire.
Andy.
On 1/3/17, Neil McDonald <nmcd10 at gmail.com> wrote:
> One of my New Years resolutions, before I put the car back on the road after
> sitting in the garage for several years, is to fix the overdrive so the car
> is comfortable highway driving. It once (and once only) went into OD once
> very briefly - which suggests that nothing mechanical is broken.
>
> So far I have persuaded myself that the OD electrics are fine and there is
> adequate hydraulic pressure - around 390 psi if I recall correctly. I have
> also checked the hydraulic valve adjustment using the "drill through the
> actuating lever" method but not the direct "is the valve ball lifting by at
> least 1/32 inch when the solenoid is actuated?" method.
>
> Somewhere I read that there is a small passage around the hydraulic valve
> area which can get blocked and thus needs cleaning out with a wire. Is there
> an internet link elaborating on this?
>
> Online research also suggests that I should change out the OD fluid which is
> certainly old and a significant amount could have leaked out. I assume that
> the gear box has a drain and filler plug but have yet to find them. Should I
> refill to just short of overflowing or ......?
>
> I don't have the resources to pull and strip the OD myself so am hoping that
> I can get it working without hiring a professional. Does anyone have any
> words of wisdom and/or comfort?
> _____________________
> Neil McDonald
>
> Email: nmcd10 at gmail.com
>
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