1994 Toyota 4Runner 1994 4runner transmission overdrive and

1994 TOYOTA 4RUNNER
145,000 MILES • 6 CYL • 2WD • AUTOMATIC
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COURTRIGHTW
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During winter months(last three years), my transmission does not seem to shift into overdrive until driving betwen 2 to 10 miles. A reputable trans. shop just told me that the torque converter is not going into full lockup.
They indicated that the vehicle computer prevents this when the engine is cold. The engine does warm up-the temp guage is in the midle and i get heat from the vehicle cabin heater all within 1 mile. What would be the possible problem? My radiator and t stat are new(leaks).The problem occured previously with the old radiator and t stat. Also, The trans shop serviced the trans, It was due.
P.S. I'm new to your site, What should a typical donation be? Thanks.
Jan 28, 2009 at 8:58 PM
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RACEFAN966
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Ok I need to ask a couple of questions first to better help you. Now first do you have an overdrive button on the shifter? Do you have a digital multi meter to do some tests with and do you feel comfortable enough doing a couple of test? Get back to me with the info needed and we will take it from there.
Jan 29, 2009 at 10:53 AM
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COURTRIGHTW
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Yes, It has a od button on the shifter.
When the trans is in od the button does work to swap it into and out of od. _after the inital warmup.
I do have a meter, Fire away with your query's.
Thanks, Bill
Jan 29, 2009 at 5:34 PM
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RACEFAN966
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Ok I am thinking we need to test that switch to see if it is any good or not. I am going to include a diagram of a connector for you to test for voltage. You need to connect you meter between T1 and E1 and road test the vehicle and the voltage should go from 0 volt to 7 volts. If not then check for voltage between L and E1 you should have 12 volts. Let me know what you find.


https://www.2carpros.com/forum/automotive_pictures/249564_Graphic_34.jpg

Jan 30, 2009 at 11:08 PM
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COURTRIGHTW
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I've pulled the kickpanel beside and below the steering wheel and cant find dlc2 port. Is it where the pic show's?
I'll look some more for it. Let me know where else it might be.
Thanks, Bill
Feb 1, 2009 at 11:03 AM
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RACEFAN966
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It only show's the pic that I have already send it it isn't there I will have to see if there is some other kind of test we can do.
Feb 2, 2009 at 12:47 PM
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COURTRIGHTW
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I have the dash kick panels off. i just don't think
its there.
Feb 2, 2009 at 7:29 PM
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RACEFAN966
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Ok I do have a road test for you to do first ok I am sorry I forgot about this. Now at the rear of the transmission is an electrical connector to a solenoid unplug it. Now drive it and see if it shift into overdrive. If it doesn't the the transmission is the problems. If it does let me know and we will go to the next test. This may set a code for the transmission however so you will need to clear it by removing the EFI 15 amp fuse for 10 sec ok. Let me know how it goes.
Feb 2, 2009 at 8:22 PM