intermittent automatic transmission problem - 87 4runner.

I am looking for help diagnosing an intermittent automatic transmission
problem on an 87 4runner.

The symptoms are as follows:

Occasionally after running up through the normal gear range then coming
to a stop, the transmission does not down shift. To get moving, I have
to manually shift down to "1" then up through the gear range.

This will happen just once or twice per trip, sometimes not at all. It
seems to occur whether the overdrive is on or off. The AT fluid level
is correct and the fluid appears to be clean and un-burnt. The engine
is a 22RE (no turbo).

Any help/suggestions are greatly appreciated!

Thanks!
Mark

"Mark" <ch4@rocketmail.com> wrote in message
news:1141772663.479575.153360@i40g2000cwc.googlegroups.com...[color=blue]
>I am looking for help diagnosing an intermittent automatic transmission
> problem on an 87 4runner.
>
> The symptoms are as follows:
>
> Occasionally after running up through the normal gear range then coming
> to a stop, the transmission does not down shift. To get moving, I have
> to manually shift down to "1" then up through the gear range.
>
> This will happen just once or twice per trip, sometimes not at all. It
> seems to occur whether the overdrive is on or off. The AT fluid level
> is correct and the fluid appears to be clean and un-burnt. The engine
> is a 22RE (no turbo).
>
> Any help/suggestions are greatly appreciated!
>
> Thanks!
> Mark
>[/color]

I'd check the connections to the shift solenoids on the transmission case.
--

Ray O
(correct punctuation to reply)

Thanks Ray,

I checked the connectors and can't find anything obviously wrong. I
just noticed that the overdrive off switch has started blinking when
the downshifting problem occurs. From what I gather this may be an
indicator of a problem with one or more of the solenoids however I
can't find a reference for the OD trouble codes anywhere. Does anyone
happen to know where I might locate these?

Thanks Again For Any Info
Mark

<ch4@rocketmail.com> wrote in message
news:1141975603.357209.105130@p10g2000cwp.googlegroups.com...[color=blue]
> Thanks Ray,
>
> I checked the connectors and can't find anything obviously wrong. I
> just noticed that the overdrive off switch has started blinking when
> the downshifting problem occurs. From what I gather this may be an
> indicator of a problem with one or more of the solenoids however I
> can't find a reference for the OD trouble codes anywhere. Does anyone
> happen to know where I might locate these?
>
> Thanks Again For Any Info
> Mark[/color]

When the OD off light flashes, it means that the transmission electronic
control unit (ECU) has stored trouble codes. You can go to
[url]http://techinfo.toyota.com/[/url] and purchase daily or annual access to factory
repair manuals.
--

Ray O
(correct punctuation to reply)