Detail: It shifts hard but not all the time sometimes it shafts fine the car has 86000 miles on it it is a 3.4 litre I took it to get the tranny diagnosed and the guy said the cars computer was telling the tranny to add extra pressure to the lines I changed the fluid and filter the fluid was fine.and that fixed nothing any ideas. thanks
Solution: Hook that diagnostic computer to the car. If the cod reads P1810 then u need a Pressure Control Solenoid. Your check engine light will not come on with this code. The mechanic will have to drop the transmission to install the solenoid. Have a 2000 pontiac bonneville that had the same problem and ever since I did the solenoid change I have had no other problems. , Is the check engine light on? Following the dianostic codes troble tree may find the problem. This sounds like a speed senser or throttle position sener prble but the problem doesnt come and go it just gets wourst. , Hi, a 6ya Mechanic can help you resolve that issue over the phone in a minute or two. Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US. click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need. Goodluck!