P1740 p1860

[graywesley]

97 5.7 4l60e

Trans went into limp mode. Was stuck in limp mode till I changed pwm solenoid fluid and filter. Also changed lock up solenoid. Had 5 codes including the 2 all went away but 860. If I clear it once I get moving everything works fine tcc engages... if I come to a stop it throws the code. As long as I don't stop long it stays clear help please. Have also changed ignition switch. It says open short to ground....

 

[Schurkey]

P1860: Code Meaning, Causes, Symptoms, & Tech Notes

The Torque Converter Clutch Pulse Width Modulation (TCC PWM) solenoid valve controls the fluid acting on the converter clutch valve. The converter clutch

www.engine-codes.com

Grab a Genuine GM service manual, follow the diagnostic procedure for P1860.

 

[1997]

should help you out,
https://shop.ukrtrans.biz/wp-content/uploads/catalogs/4L60E_80E_CODE_BOOK.pdf

https://atracom.blob.core.windows.net/bulletins/2000/dec/atb583.pdf

 

[graywesley]

Figured I'd update AutoZone had sold me a 3-2 downshift solenoid instead of the pulsing pwm one. Just happened upon a picture describing the different solenoids for the different years. 97 and up had a grey electrical connector. The one they sold will work as a pwm for the older ones but but it's a simple on or off.

 

[stutaeng]

Good to hear you figured it out. Those shift solenoids/pwm solenoids have unique connectors, don't they? Like, you can't plug in the 1-2 into the 3-4 solenoid, right? Same for the PWM?

 

[graywesley]

Good to hear you figured it out. Those shift solenoids/pwm solenoids have unique connectors, don't they? Like, you can't plug in the 1-2 into the 3-4 solenoid, right? Same for the PWM?

You can plug them in to each other they have different colored connections. 97+ is grey the other is tan/white

 

[graywesley]

You can plug them in to each other they have different colored connections. 97+ is grey the other is tan/white