I have a 99 chevy metro whose transmission was rebuilt in April 09 but is now not shifting into reverse or drive. It started off with trouble going into reverse, sat a couple of months, now it won't go into drive. Any ideas on the problem? Transmission fluid is at proper level, filter is clean and there are no metal shavings in the pan.
Sounds like a shift shaft problem. When the tranny was rebuilt the tech might not have used locktite or re-used hardware that should have been replaced. The other possibility is that the shift cable is out of adjustemnt or worn. If you get under the car and look where the shifter is in the tunnel you will see the cable and other components. Check all for excessive play and follow cable to tranny and see if it is able to move freely and if it is loose or worn.
Unfortunately, the transsmission will need to be torn down if the shifter or the cable is not to blame. The only other thing I can thik of is sometimes the is lockout linkage attached to the brake that does not allow the car to be put into gear unless the brake is depressed. The same goes if the key is not in the ignition and in the start position. These likanges/cables could also be at fault due to the same reasons as the shifter linkage itself.
Try to get the shop that fixed it to give you a good deal even if it is out of warranty if you have not put many miles on it since the rebuild.
Let me know how it goes and I will watch this post for your response.