Ford Mustang (1999-2004) Service Manual: Shift Point Road Test
This test verifies that the shift control system is operating correctly.
1. Bring engine and transmission up to normal operating temperature.
2. Operate vehicle with transmission range selector lever in (D) position.
3. NOTE: Shift speed ranges are approximate for all applications. For specific applications (engine, axle ratio and application) refer to the Automatic Transmission Specification Issue, available from Ford Customer Service Division.
Apply minimum throttle and observe speeds at which upshift occurs and torque converter engages; refer to the 4R70W Shift Speeds chart in this section.
4. With the transmission in Overdrive (fourth gear), press the transmission control switch. The transmission should downshift to third gear. Release the accelerator pedal; engine braking should occur.
5. Press accelerator pedal to floor, wide open throttle (WOT). Transmission should shift from third to second gear, or third to first, depending on vehicle speed. Torque converter clutch should disengage and then reapply.
6. With the transmission in (D) position and speed above 80 km/h (50 mph) and less than half throttle, move the transmission range selector lever from (D) position to manual 2 position and remove pressure from the accelerator pedal. Transmission should immediately downshift into second gear. With vehicle remaining in manual 2 position, move the transmission range selector lever into manual 1 position, and release accelerator pedal. Transmission should downshift into first gear at speeds approximately below 45-56 km/h (28-35 mph).
7. If transmission fails to upshift/downshift or torque converter clutch does not apply and release, refer to Diagnosis By Symptom in this section.
Shift Speeds 4.6L 4V MACH 1 (3.55:1 Axle Ratio)
Shift Speeds 4.6L 2V HO (3:27:1 Axle Ratio)
Shift Speeds 3.8L (3:27:1 Axle Ratio)
Shift Speeds 3.8L (3:08:1 Axle Ratio)
Preliminary Inspection
The following items must be checked prior to beginning the diagnostic
procedures:
Know and Understand the Concern
In order to correctly diagnose a concern, first understand the
customer compla ...
Torque Converter Diagnosis
Prior to the installation of a new or remanufactured torque
converter, all diagnostic procedures must be
followed. This is to prevent the unnecessary installation of torque
converters. Only af ...
Other materials:
Parking brake
WARNING: If the parking brake is fully released, but the brake
warning lamp remains illuminated, the brakes may not be
working properly. See your authorized dealer as soon as possible.
WARNING: Always set the parking brake fully and make sure
that the transmis ...
Tire care
Information About Uniform Tire Quality Grading
Tire Quality Grades apply to new
pneumatic passenger car tires. The Tire
Quality Grades can be found where
applicable on the tire sidewall between
tread shoulder and maximum section
width. For example:
• Treadw ...
Removal
WARNING: The restraints control module (RCM) orientation is critical
for proper system
operation. If a vehicle equipped with an air bag supplemental restraint system
(SRS) has been
involved in a collision in which the center tunnel area has been damaged,
in ...
