1988 - 1998 (GMT400) Section for all discussion related to the 1987-1998 Chevrolet and GMC trucks.

Transmission won't try to shift to 3rd

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Old Jul 14, 2020 | 9:10 AM
  #1  
Reconyx_01's Avatar
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From: Georgia
Default Transmission won't try to shift to 3rd

I have a '94 k1500 with a freshly remanufactured 4l60e. I put the transmission in myself and it has never even tried to shift to 3rd. 1st, 2nd, and Reverse shifts fine... Since it's a new remanufactured transmission idk what's wrong. Any help is much appreciated, Thanks
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Old Jul 15, 2020 | 12:14 PM
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From: Central Iowa
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1) Check for codes even if the CEL isn’t lit - you probably won’t get anything but it doesn’t hurt to check.

2) Did you have difficulty removing the connectors when you removed the transmission? They are held into the range/PNP switch with glue from the factory - even if you used a heat gun to remove them, replacing the connectors is recommended because they’re difficult to seat and seal correctly.

3) What engine does it have so I can check the wiring diagrams if needed?
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Old Jul 16, 2020 | 7:31 PM
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Reconyx_01's Avatar
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From: Georgia
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Originally Posted by Gumby22
1) Check for codes even if the CEL isn’t lit - you probably won’t get anything but it doesn’t hurt to check.

2) Did you have difficulty removing the connectors when you removed the transmission? They are held into the range/PNP switch with glue from the factory - even if you used a heat gun to remove them, replacing the connectors is recommended because they’re difficult to seat and seal correctly.

3) What engine does it have so I can check the wiring diagrams if needed?

It's the 5.7

I didn't have to use a heat gun to remove the connectors... Everything disconnected pretty easily
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