I have a 2004 Pontiac Grand Prix with 140,000 miles on it. I have had an issue with the Pressure Controlled Solenoid for a few months and between not having the time to fix it myself to not wanting to pay for the timely and costly fix I’ve been able to work around it. That issue is when the car has been heated up, 15-20 minutes at least, it will sometimes shift awkwardly between 1st and 2nd gears. Shutting off the car seems to fix this and when the car is cold there is never an issue. From everything I have read repairing the PCS will fix this.
Yesterday my car started to feel like it was shifting hard between 2 and 3 and 3 and 4. When I say shifting hard it actually just feels awkward so I’m starting to think I just need to replace the PCS quickly. But even when I am up to speed, going past 60 mph on the freeway, the rpm’s are jumping around. It almost feels like the car is going to cut out at times. I played around with the speed driving into work but there was no real way of improving it. I checked my fluids and they are good.
I know the PCS needs to be replaced. Would the RPM’s jumping around past 60 mph’s be connected to this as well?