A/T - A4LD Engine RPM Increases On Downshift

TRANSMISSION - A4LD - 2.3L, 2.9L, 3.0L - Article No.
ENGINE RPM INCREASES ON DOWNSHIFT - 87-5-22
TRANSMISSIONS BUILT BETWEEN 07/30/86 AND 10/01/86

FORD 1987 MUSTANG

LIGHT TRUCK 1986-87 RANGER, BRONCO II, AEROSTAR

Figure 29:

ISSUE: An increase of approximately 1000 engine RPM when downshifting to 2nd gear in Drive or Overdrive during a 3-2 or 4-2 downshift may be caused by a mispositioned channel in the #214 (3-2 kickdown timing valve) bore of the main control casting (see Figure 29). This condition usually occurs within a narrow 3 mph/5 km/h range at a normal speed of 38 mph/61 km/h depending upon axle ratio and tire size.

ACTION: To correct this, install a new service valve, E7TZ-7D054-A, using the following service procedure.


1. Confirm that increase in engine RPM occurs on downshift by road testing the vehicle.

2. If the transmission build date falls within the July 30-October 1, 1986 time period, remove oil pan to determine casting supplier code, casting date and cavity number (Figure 29).

3. If the main control has the matching identification specified in Figure 29 (Supplier Code 1-7010-D, Cavity No. 1, Build Date 30th Week '86 through 39th Week '86 and Part No. P86GT-7A101-AAR), remove main control using the procedure in Section 17 of the appropriate Shop Manual and repair as follows:

^ Locate bore #214 using the appropriate Shop Manual.

^ Remove separator plate, gasket, retainer, spring and valve from bore #214. Discard the original valve, but save the other parts for reassembly.

^ Install new service valve, E7TZ-7D054-A, and reinstall spring, retainer, gasket and separator plate.

^ Reinstall main control using the appropriate Shop Manual.

NOTE: If the main control does not match the qualifying identification, the above repair must not be made even if a similar concern is reported. Additional concerns may occur if this repair is made to other than qualifying transmissions.


4. Drive vehicle to determine if repair has corrected the concern.


PART NUMBER PART NAME CLASS

E7TZ-7D054-A Service Valve C

OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: Reimbursable within the provisions of the Warranty and Policy Manual
OPERATION: SP870522A
TIME: 2.5 Hrs. DLR. CODING: Basic Part No. 7A100 - Code: 09