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A/T won't downshift out of OD

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Old Apr 20, 2011 | 05:06 PM
  #1  
puddlejockey's Avatar
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From: Charlotte, NC
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-
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Old Apr 20, 2011 | 09:03 PM
  #2  
yotarover's Avatar
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Joined: Jun 2009
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From: NC
solenoid ? just a rough shot http://www.makcotransmissionparts.com/97420K.html
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Old Apr 21, 2011 | 02:12 AM
  #3  
Sportsmanphil's Avatar
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From: North Carolina
Doesnt the 88 Toy autos use a kickdown cable?
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Old Apr 21, 2011 | 05:11 AM
  #4  
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From: Meridian Mississippi
Correct on the kickdown cable........
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Old Apr 21, 2011 | 05:36 AM
  #5  
Marc's Avatar
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From: Winnipeg, MB, Canada
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.
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Old Apr 21, 2011 | 02:10 PM
  #6  
BMcEL's Avatar
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From: Oregon, USA
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!
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Old Apr 22, 2011 | 07:05 AM
  #7  
Team420's Avatar
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From: the great Maine wilderness
X2 on the tps, and kickdown cable!
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Old May 15, 2011 | 06:56 PM
  #8  
BMcEL's Avatar
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From: Oregon, USA
Well?
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