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A/T won't downshift out of OD

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Old 04-20-2011, 05:06 PM
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A/T won't downshift out of OD

Hey all-
Thanks in advance for all your help on other stuff, but I've got a new one!
The AT in my '88 3. slow shift fine through the gears, including OD, without any issues; but once it gets into OD, it stays there, even under full throttle.
It also seems to shift into "top gear" a little early.
If you use the OD off switch, the tranny functions fine in the first gears.

So heavy acceleration ( onramps, passing, etc) are a no go.

My Mechanic that's been working on it while I recovered from surgery said I should " just use the button, it's an '88".
I'm not very thrilled with that response, though. I'm also about 80% recovered, and have gained just enough confidence to really get in trouble, since the minor success of cleaning the injectors, and replacing that little j shaped coolant hose and BVV.

Any thoughts?

Thanks-
Old 04-20-2011, 09:03 PM
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solenoid ? just a rough shot http://www.makcotransmissionparts.com/97420K.html
Old 04-21-2011, 02:12 AM
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Doesnt the 88 Toy autos use a kickdown cable?
Old 04-21-2011, 05:11 AM
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Correct on the kickdown cable........
Old 04-21-2011, 05:36 AM
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I don't think it's a kickdown cable.
I think it controls line pressure.
At least I believe it is on the 2cnd gens.
Old 04-21-2011, 02:10 PM
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I noticed my '90 doing exactly this when I disconnected the throttle position sensor for some testing. I would recommend testing your TPS first.

http://www.4crawler.com/4x4/CheapTri...ml#AliveOrDead

Keep us posted!
Old 04-22-2011, 07:05 AM
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X2 on the tps, and kickdown cable!
Old 05-15-2011, 06:56 PM
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Well?
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