Testing Procedure
Connect tachometer to engine. Apply parking and service brakes firmly. Place selector lever in each gear. Press accelerator completely to floor and record tachometer reading in each gear. DO NOT exceed 5 second limit. Engine speed should be within specifications. See STALL SPEED SPECIFICATIONS .
STALL SPEED SPECIFICATIONS
| Application | Engine | Min.-Max. RPM |
|---|---|---|
| Mustang | 2.3L | 2495-2885 |
| Ranger (2WD) | 2.3L | 2437-2833 |
| Aerostar (2WD) | 3.0L (V6) | 2720-3165 |
| Ranger (2WD, 4WD) | 2.9L (V6) | 2781-3288 |
| Aerostar (2WD, AWD) | 4.0L (V6) | 2550-2950 |
| Explorer (2WD, 4WD) | 4.0L (V6) | 2550-2950 |
| Ranger (2WD, 4WD) | 4.0L (V6) | 2550-2950 |