I drive my Z once every 2 weeks, and I have noticed it is a bit harder to get into gear when cold and initial start up, but does get easier as it warms up.
1. Does it go into gear when the car is off?
2. Have you tried letting the car warm up and tried again?
3. This may be a long shot, but can work. Lean forward and slam backwards towards the seat while in neutral and try to have the car roll back SAFELY a little bit, and then see if it goes into gear.
4. Do you still have the OEM CSC on the car?
|