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4l60e shift solenoid

lydens87

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lydens87 Enthusiast

lydens87

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I just recently got a 97 c1500 Sierra. When I bought it, it had a code for the shift solenoid. I went ahead and replaced both solenoids, now when it's cold it'll run in limp mode until it warms up. After it warms up, I'll pull over to a gas station and turn it off for about 5 minutes then it drives absolutely PERFECT. Until it cools back off. Any guesses on what I need to fix it???

 

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riverbanks Senior Enthusiast

riverbanks

Posted
Posted

Ok, check trans fuse for battery voltage, when you were underneath,any harness look altered,not in perfect condition?

lydens87 Enthusiast

lydens87

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Not that I saw, it was an old man's truck, so everything is completely original and LOOKS perfect

lydens87 Enthusiast

lydens87

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So I checked the codes again and came up with:
P0740 TORQUE CONVERTER CLUTCH CIRCUIT/OPEN
P0785 SHIFT TIMING SOLENOID
P1860 TCC PWM SOLENOID ELECTRICAL

I couldn't find my multimeter to check the voltage, but according to my handy test light, it does have power to it. After researching constantly everything sounds like it'd be the Ignition Switch except for the gauge cluster has been working fine.

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