I have a 1992 240sx convertible. When I purchased it a year ago it had had a transmission rebuild. That warrantee expired a year ago. Drove it the other day, haven’t in about two months. It won’t shift into 4 th gear. It isn’t worth another trans rebuild so I wondering if anyone has any suggestions. I plan on taking to mechanic but if he tells me needs a rebuilt I guess it goes to charity. Love this car but can’t afford the price of a trans rebuild.