High In All Ranges
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 1994 Mazda MX-5 Miata, 1992 Mazda MX-5 Miata, 1992 Mazda MPV, 1992 Mazda B2200, and 1991 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.
Worn oil pump. Oil leakage from oil pump, control valve and/or transmission case. Stuck pressure regulator valve, direct clutch slipping or OD one-way clutch slipping.