'88 Camry: O/D won't work until up to temp.

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Old 01 Dec 2006, 09:14 am   #1 (permalink)
geronimo
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Default '88 Camry: O/D won't work until up to temp.

Its the 4cyl, I4 wagon. Trans. has been working perfect. Now the
overdrive gear won't engage until the engine gets up to normal
operating temp. I suspect it's when the control system is going
closed-loop. It's not the O/D switch at all. Cycling it doesn't help
at all. Just have to drive it revved up, and then just as soon as the
temp gauge reaches normal temp, about mid- scale, it will
automatically drop down into O/D gear. So I am wondering if there is
some external circuit/control that could be the problem....and if so
then might be repairable. If internal fault, then I just have to live
with it. Thanks, Geronimo
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Old 01 Dec 2006, 08:42 pm   #2 (permalink)
Jason James
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Default Re: '88 Camry: O/D won't work until up to temp.


"geronimo" <Jamesw@grandecom.net> wrote in message
news:03h0n21taosegvp3f8m6rvdfm232v9rfmv@4ax.com...
> Its the 4cyl, I4 wagon. Trans. has been working perfect. Now the
> overdrive gear won't engage until the engine gets up to normal
> operating temp. I suspect it's when the control system is going
> closed-loop. It's not the O/D switch at all. Cycling it doesn't help
> at all. Just have to drive it revved up, and then just as soon as the
> temp gauge reaches normal temp, about mid- scale, it will
> automatically drop down into O/D gear. So I am wondering if there is
> some external circuit/control that could be the problem....and if so
> then might be repairable. If internal fault, then I just have to live
> with it. Thanks, Geronimo


It maybe the case that a solenoid or a hydraulic seal is only working once
some heat has got into that part of the trans. Its not unusual for an old
transmission, My old Ford has the original trans, its a '79 model, and it
takes a long time to go into reverse when its hot. Thing is, its been like
that for 10 yrs, and has not got worse, so try to live with the problemm in
any case, some driving in 3rd until it warms up is not that bad an idea.
Better to not labor a cold motor better for the pistons :-)

Jason


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Old 05 Dec 2006, 02:07 am   #3 (permalink)
Johnnyboy
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Default Re: '88 Camry: O/D won't work until up to temp.

I thought that was the way they were designed to operate. It prevents the
engine lugging until it is warm.
My Camrys take a few blocks to get up to temperature, and then the overdrive
drops in fine.
Perhaps the thermostat is stuck open and the car is taking longer to warm
up.
John

"geronimo" <Jamesw@grandecom.net> wrote in message
news:03h0n21taosegvp3f8m6rvdfm232v9rfmv@4ax.com...
> Its the 4cyl, I4 wagon. Trans. has been working perfect. Now the
> overdrive gear won't engage until the engine gets up to normal
> operating temp. I suspect it's when the control system is going
> closed-loop. It's not the O/D switch at all. Cycling it doesn't help
> at all. Just have to drive it revved up, and then just as soon as the
> temp gauge reaches normal temp, about mid- scale, it will
> automatically drop down into O/D gear. So I am wondering if there is
> some external circuit/control that could be the problem....and if so
> then might be repairable. If internal fault, then I just have to live
> with it. Thanks, Geronimo



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