1995 Chevy 305 engine P1860 TCC PWM solenoid

Question

Hello

I have a 1995 Chevy 305 engine. I have done about everything to this G10 1500 Express Van. It has not shifted well in some time! Shift hard and doesn't go into 4th gear. I've already done the throttle body and replace a few sensors especially on the T.B itself. To me it feels electrical.

Auto Zone code P1860 TCC PWM solenoid. I checked the Internet and all the problems I am having seem to be the TCC PWM problem. It runs very rough on idle and when you press the accelerator.

How hard is it to change? I am above average mechanic but by no means any transmission work! Is it expensive? Where or how to you get to and change it out?

One more question,
My AC leaks on the left side behind the black box beside the fan motor. You can hear it whenever adding Freon.

Do You Have To Take The Entire Dash OFF To Get To IT???
That doesn't sound very FUNNNN!!!!

But the TCC PWM I sure could use some kind of diagram!!

Answer 1

P1860 CHEVROLET - TCC PWM Solenoid Circuit Electrical

Read more: https://www.autocodes.com/p1860_chevrolet.html