Transmission does not shift from first gear to second gear upshift

Tiny
ROLANDBK
  • MEMBER
  • 1996 TOYOTA 4RUNNER
  • 3.0L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 120,000 MILES
Vehicle forces slow down instead of shifting from first to second gear. Manual says disconnect shift solenoid from transmission. Then drive and see if vehicle shifts using automatic shifter from L to 2 to D to test if transmission issue or solenoid issue. I think I found the wires on the transmission but how do I unplug the wires without breaking plastic? Please describe preferably with a picture or a diagram of plug and method. Thank you.
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Friday, July 1st, 2022 AT 4:46 PM

9 Replies

Tiny
KEN L
  • ADMIN
Does your speedometer work when you drive it? The manual wants you to remove the transmission pan and disconnect the wires from the solenoid and then reinstall the pan and refill with fluid. There is no other way unless you just cut the wires to see if that works but I would replace the shift solenoid instead because it is common for them to go out. We are doing this repair in the shop as we speak. Here is the location of the shift solenoids and the color of the wiring going to them, this will tell you, which is which, when we do this job, we just replace all shift solenoids, but that is up to you. Check out the diagrams (below). Let us know what happens and please upload pictures or videos of the problem.
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Saturday, July 2nd, 2022 AT 1:55 PM
Tiny
ROLANDBK
  • MEMBER
Yes, my Speedometer works. I read the manual differently. I was hoping I could disconnect the wires from the outside of the transmission. Are the wires in this picture not the very same solenoid wires inside the transmission? I see some plugs and or clips that look like they may either detach from the transmission or disconnect from each other. Are one of these plugs/clips possibly the solenoid connections I was hoping to disconnect without going into the transmission? I am quite poor. I realize I may need to take that next step anyway but, if possible, I would rather drive around the farm in †manual mode†until I can come up with the funds to replace the transmission gasket and solenoids. If I do need to go into the transmission, is there a dirt poor pro tip that doesn’t destroy the gasket and a way to unstick a solenoid and therefore getting back on the road for, dare I say, the cost of my time? Stuck doesn’t sound like broke to me. I understand the potentiality of my tinkering and wishful thinking may cause a false sense of repair and only last a short time.

Thank you for your patience and time.
Rolandbk
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Sunday, July 3rd, 2022 AT 11:13 PM
Tiny
KEN L
  • ADMIN
Thats funny, I was going to suggest doing just that. Here are the wiring diagrams and which wires you should cut. Check out the diagrams (below). Please let us know what you find.
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Tuesday, July 5th, 2022 AT 11:55 AM
Tiny
ROLANDBK
  • MEMBER
So, I tested the two shift solenoids, one didn’t click when I applied 12volts to it. So, I carefully took it apart and didn’t see anything stuck or bound up, put it back together and no change. So, I ordered two new ones, and they should be arriving shortly. The fluid stunk like it was burnt, but there was not any metal to speak of on the magnets on the pan. I’ll let you know if it was the problem, I assume so since there wasn’t any slippage from neutral to 1st or to reverse.

The screen/filter wasn’t plugged at all from what I could see, so I didn’t replace it.

I’ve read that I shouldn’t just replace all the fluid at once. That I should replace what came out when I dropped the pan, but wait a few miles and quart by quart replace the fluid over time?

Thanks again, you guys have been more than patient and helpful!

Roland
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Monday, July 18th, 2022 AT 1:50 PM
Tiny
KEN L
  • ADMIN
Hi Roland, I would just worry about the fluid in the pan, if you have an internal problem the fluid condition will not matter, if you replace the solenoids and it works, then do all the fluid. Let me know.
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Tuesday, July 19th, 2022 AT 11:14 AM
Tiny
ROLANDBK
  • MEMBER
So, I bench tested the three solenoids I could see and one of them didn’t work. I replaced all three and test drove and same issue. My service engine soon light is on as well as when I start the vehicle the automatic transmission temperature light is on as well. So, would a faulty temperature sensor cause it to do that force slow down instead of shifting into second? The transmission really seems okay because it’s such a good grab when I put it into drive or reverse.

Thank you again,
Roland
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Thursday, August 4th, 2022 AT 11:15 AM
Tiny
KEN L
  • ADMIN
Yes, it sure could. Here is the location and instructions on how to replace it. Let me know.
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Thursday, August 4th, 2022 AT 6:49 PM
Tiny
ROLANDBK
  • MEMBER
Is there any way to check if it is in fact the sensor before I throw parts at it?
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Sunday, August 7th, 2022 AT 9:09 PM
Tiny
KEN L
  • ADMIN
Sorry, they do not give us testing procedures on this sensor.
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Monday, August 8th, 2022 AT 5:39 PM

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