The car a 88 Mazda mx-6 lx auto (127,00miles) it doesn’t seem to engage in 3rd gear or overdrive on the normal (D)rive selector, its just slips completely and revs, but if I put the Hold on in the 3rd gear select I can start off and it work slip. I took it to a mechanic that did previous work on the car and he said I need a new Trans. Also the (R) light on the dash doesn't come on when in reverse, my hold light doesn’t flash and there are no CEL's. Could this be an ECU problem or connectors or is the tranny just toast. I know there have been a few threads about similar problems, I changed the fluid and filter, magnets were very dirty and the fluid was really dark and gunked up. I can get a replacement Trans for $250; also can get the shop manual from the downtown library. Any help would be appreciated.