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Transmission will not shift into third gear

Tiny
ALEX BRUTCHAK
  • MEMBER
  • 2003 CHEVROLET SILVERADO
  • 5.3L
  • V8
  • 4WD
  • AUTOMATIC
  • 60,000 MILES
Shifts into first and second fine but will not shift into third gear, it just acts like it goes into neutral. I put one quart of transmission fluid in it and replaced the fuse. I also tried to manually shift it but when I put it in four wheel drive it worked good shifted good for three minutes after that I had the same problem. 4l60e transmission.
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Friday, January 19th, 2018 AT 9:46 PM

21 Replies

Tiny
ASEMASTER6371
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Good morning.

Fuse? There is no fuse for third gear. Was the fuse burned that you replaced?

Does it go up to fourth gear?

Roy
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Sunday, January 21st, 2018 AT 5:25 AM
Tiny
ALEX BRUTCHAK
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No it does not and it is the ing0 fuse that controls the 3/4 clutch pack solenoid.
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Sunday, January 21st, 2018 AT 5:40 AM
Tiny
ASEMASTER6371
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Okay, that fuse controls all solenoids. If that was the issue it would not have shifted from first to second either as the solenoid has to work for the shift.

Does it go into fourth?

It could be the solenoid but needs to be checked. Do you have a scan tool that can read live data with the transmission to see if there is a command to the solenoid?

Roy
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Sunday, January 21st, 2018 AT 5:52 AM
Tiny
ALEX BRUTCHAK
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No it does not shift to fourth.
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Sunday, January 21st, 2018 AT 6:02 AM
Tiny
ASEMASTER6371
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Okay, another thought. The TPS sensor on the throttle body controls the shift points. It could be an issue if the voltage readings are wrong.

Do you have anything that you can read live data?

Roy
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Sunday, January 21st, 2018 AT 6:07 AM
Tiny
ALEX BRUTCHAK
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No I do not. I did just re-spliced my wires on the TPS though.
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Sunday, January 21st, 2018 AT 6:12 AM
Tiny
ASEMASTER6371
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Was everything okay prior to this repair?

Roy
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Sunday, January 21st, 2018 AT 6:15 AM
Tiny
ALEX BRUTCHAK
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Yes, it did not do any of this other than put it into limp mode for TPS voltage reading bad.
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Sunday, January 21st, 2018 AT 6:16 AM
Tiny
ASEMASTER6371
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Okay, did you replace the TPS?

Also, did you solder and shrink wrap the wires? Very important that butt connectors not be used.

Roy
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Sunday, January 21st, 2018 AT 6:20 AM
Tiny
ALEX BRUTCHAK
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I used the tunnel connectors.
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Sunday, January 21st, 2018 AT 6:21 AM
Tiny
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Those are butt connectors.

Did you replace the TPS sensor itself?

Roy
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Sunday, January 21st, 2018 AT 6:23 AM
Tiny
ALEX BRUTCHAK
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Yes I did.
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Sunday, January 21st, 2018 AT 6:26 AM
Tiny
ASEMASTER6371
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Okay, I would start back at the connector. Start by soldering and shrink wrapping the connections.

Is the check engine light on? If so, what are the codes?

Roy
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Sunday, January 21st, 2018 AT 6:29 AM
Tiny
ALEX BRUTCHAK
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Manufacturer control code.
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Sunday, January 21st, 2018 AT 6:34 AM
Tiny
ASEMASTER6371
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What was the code number? Then your code reader cannot read it. You will need a parts store to read it for you. That is our clue to whats going on.

Roy
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Sunday, January 21st, 2018 AT 6:39 AM
Tiny
ALEX BRUTCHAK
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Doing the wires without butt connectors fixed it. Thank you.
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Sunday, January 21st, 2018 AT 7:33 AM
Tiny
ASEMASTER6371
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Great. Glad to hear it. That is why it is important for correct connections.

Roy
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Sunday, January 21st, 2018 AT 7:35 AM
Tiny
ALEX BRUTCHAK
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Why did the butt connectors make it do that?
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Sunday, January 21st, 2018 AT 7:46 AM
Tiny
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Voltage drop. They never make a good connection so the voltage even being off.1 volt will affect the results.

Roy
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Sunday, January 21st, 2018 AT 8:02 AM
Tiny
ALEX BRUTCHAK
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I did not know that, thank you!
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Sunday, January 21st, 2018 AT 8:46 AM

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