Recent content by ---gyro---

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96 Chevy K1500 4l60e Hard Shifting

Well I am going to answer my own question. The problem was that the red / black wire that goes to pin "C" on the transmission was intermittently opening or shorting to ground. This wire goes to one side of the PCS solenoid. When this happens, the PCM would see this and turn off the current...
- ---gyro---
- Post #4
- Apr 8, 2020
- Forum: Transmissions
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96 Chevy K1500 4l60e Hard Shifting

Nick: Thanks for the fast reply! No, I have not replaced the PCS solenoid. So far my trouble shooting shows that the PCS itself is OK it's the signal going to the PCS that is bad. I saw a YouTube video that shows how to test the manifold pressure switch. I have read several places the this...
- ---gyro---
- Post #3
- Sep 12, 2019
- Forum: Transmissions
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96 Chevy K1500 4l60e Hard Shifting

Here is what happens: When the truck first starts everything is OK for about 10 minutes of driving then the current signal going to the PCS solenoid in the 4L60E transmission drops to zero causing the pressure in the transmission to go high and cause rough shifts. When the engine stops for a...
- ---gyro---
- Thread
- Sep 9, 2019
- Replies: 3
- Forum: Transmissions