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1994 Toyota 4Runner 1994 4Runner transmission overdrive and

Tiny
COURTRIGHTW
  • MEMBER
  • 1994 TOYOTA 4RUNNER
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 145,000 MILES
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.
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Wednesday, January 28th, 2009 AT 8:58 PM

7 Replies

Tiny
RACEFAN966
  • MECHANIC
  • 5,029 POSTS
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.
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Thursday, January 29th, 2009 AT 10:53 AM
Tiny
COURTRIGHTW
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  • 7 POSTS
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
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Thursday, January 29th, 2009 AT 5:34 PM
Tiny
RACEFAN966
  • MECHANIC
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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

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Friday, January 30th, 2009 AT 11:08 PM
Tiny
COURTRIGHTW
  • MEMBER
  • 7 POSTS
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
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Sunday, February 1st, 2009 AT 11:03 AM
Tiny
RACEFAN966
  • MECHANIC
  • 5,029 POSTS
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.
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Monday, February 2nd, 2009 AT 12:47 PM
Tiny
COURTRIGHTW
  • MEMBER
  • 7 POSTS
I have the dash kick panels off. I just don't think
its there.
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Monday, February 2nd, 2009 AT 7:29 PM
Tiny
RACEFAN966
  • MECHANIC
  • 5,029 POSTS
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.
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Monday, February 2nd, 2009 AT 8:22 PM

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