(4)Shifts - Erratic or High Lever Efforts
Erratic Shifting Due to Transmission Case
Counterbore Wear
Slipping during upshifts and downshifts and/or fluid leakage at the transmission vent assembly may be caused by governor seal ring wear or transmission case wear (counterbore area), allowing internal leakage past the transmission governor. If the seal rings and transmission case need to be replaced because of this wear, new viton rubber seals (E7TZ-7D011-A) should be used. These new seal rings are available as a separate service part. If the original transmission case is used, the cast iron seal rings (D4ZZ-7D011-B) should be installed. Refer to the procedure outlined in the appropriate Car or Light Truck Shop Manual.
NOTE: Use of viton rubber seals in a worn or grooved transmission case (counterbore area) will result in a recurrence of leakage past the governor.
PART NUMBER PART NAME CLASS
D4ZZ-7D011-B Governor Seal Ring RM
(Cast Iron)
E7TZ-7D011-A Governor Seal Ring C
(Viton Rubber)
OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: Reimbursable within the provisions of the Warranty and Policy Manual
OPERATION: SP870215F
TIME: 9.7 Hrs. - Truck - (4x2) 11.1 Hrs. -Truck -(4x4) 9.4 Hrs. - Thunderbird, Mustang DLR. CODING: Basic Part No. 7D011 - Code: 14
Figure 11:
Shifts - Sensitive 4-3
1985 Ranger, Bronco II with 2.8L Engine
The subject vehicles with transmission build dates of 04E, 04F, 04G, 04H (see Figure 11 for date code location) may exhibit sensitive 4-3 torque demand downshifts between 45 and 55 mph (72-89 km/h). To alleviate this condition, replace the throttle pressure boost spring and the 4-3 torque demand control spring in the main control.
Prior to performing any spring replacements, the concern of sensitive 4-3 torque demand shifts should be verified. (Sometimes torque converter unlock is mistaken as a 4-3 torque demand shift.) The simplest method of verification is to maintain the throttle setting, which produced the perceived downshift, and move the selector lever from (D) overdrive to "D" drive position. If a shift occurs, the previous "shift" was actually a converter unlock.
If the concern is verified, the following procedure should be used to replace the affected springs.
1. Remove the main control from the vehicle. Follow the valve body removal procedure in Section 17-08 of the 1985 Ranger/Bronco II Shop Manual.
Figure 9:
Figure 10:
Figure 11:
2. Refer to the valve body identification illustration in Section 17-08 of the Shop Manual, or Figure 9 for spring locations. (Bore reference numbers 202 and 212.) Locate the 4-3 torque demand control valve spring (bore reference 202, Figure 10) and the throttle pressure (TV) boost valve spring (bore reference 212, Figure 11).
3. Remove the original springs from the valve body and replace with new springs. The new throttle pressure (TV) boost spring is green. The new 4- 3 torque demand control valve spring is dark green and it is also larger in diameter than the throttle pressure (TV) boost spring.
4. Install the main control valve body in the transmission according to the valve body installation procedure in Section 17-08 of the Shop Manual.
The new springs are available in Service Kit No. E5TZ-7E479-A.
Figure 12:
NOTE: Transmissions with build date codes between August 27 and October 27, 1984, are much less likely to exhibit the subject concern; however, if a vehicle having a transmission built in this time period is brought to a dealer with this concern, the above spring changes are applicable to this vehicle as well.
A4LD TRANSMISSIONS BUILT AFTER DATE CODE OCTOBER 27, 1984, HAVE THE NEW SPRINGS INCORPORATED IN PRODUCTION.
If vehicles, with transmission build dates after October 27, 1984, or have had the above spring changes performed, still exhibit sensitive 4-3 torque demands, assessment of engine systems which affect vacuum levels must be made. Suggested areas of evaluation are fuel or spark related.
It is recognized there will be instances when the above actions do not resolve the sensitivity condition, because the concerns may be, in fact, related to unlocking and locking of the torque converter clutch. It is important in those instances the customer be made aware that the converter clutch is electronically controlled by the on-board computer (EEC system). The "programming" has been designed to optimize the system with respect to fuel economy, performance and driveability.
PART NUMBER PART NAME CLASS
E5TZ-7E479-A Transmission Shift Spring R
Kit
E5TZ-7A191-A Valve Body Gasket A
OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: Reimbursable within the provisions of the Warranty and Policy Manual
OPERATION: SP870215G
TIME: 1.7 Hrs. DLR. CODING: Basic Part No. 7A100 - Code: 53
High Shift Lever Efforts
Concern of shift efforts high, rough, or sticky may be due to undercoating/clearcoating applied to the shift cable rod ends. To resolve or prevent this concern, prior to undercoating, the following is recommended:
Figure 13:
If the vehicle has been undercoated/clearcoated, inspect the shifter cable (see Figure 13) nickel plated rods for any undercoating/clearcoating. If the coating is present, replace the cable as described within the Installation Shop Manual.
In preparing the vehicle for undercoating/clearcoating, cover or mask (e.g., tape) both exposed nickel plated rod ends thoroughly. After completing the spraying, remove all masking applied, including any residue, such as adhesive left by the tape.
OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: "INFORMATION ONLY"