Early Or Late Shift Speeds
WARNING: This page does not describe the selected car, but rather 13 other vehicles, including the 2003 Mazda B4000, 2003 Mazda B3000, 2003 Mazda B2300, 2002 Mazda B4000, and 2002 Mazda B3000. However, it is still accessible from the selected car via links, so may be relevant.
Check the following: engine performance, tire size change, axle ratio change, low line pressure or valve body (sticking valves), or incorrectly tightened valve body bolts (cross-leaks).