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SERVICE BULLETINNUMBER ST-16-10/81 |
CATEGORY: TECHNICAL ATTENTION: ALL DMC DEALERS/SERVICE MANAGERS SUBJECT: AUTOMATIC TRANSMISSION ADJUSTMENT AND CHECK PROCEDURES In the event an automatic transmission complaint arises regarding shifting and/or operating irregularities, perform the following sequence of checks and adjustments. Checking and Adding Automatic Transmission Fluid 1. Ensure that the vehicle is parked on level ground and the parking brake is applied. 2. With the selector lever in the "P" Park position, start the engine and run until coolant fans operate. Note: A/C off. 3. Check the fluid level with the transmission selector in the "P" Park position and the engine running at idle. The fluid level, on the dipstick, should be checked when condition has been met in Step 2 using hot mark on transmission dipstick. 4. If additional fluid is necessary, add required amount through the automatic transmission dipstick tube to bring the level to the hot fill mark on the dipstick. Note: Use ATF containing Dextron II. Do not over fill. Throttle Adjustment 1. With the engine off, have an assistant depress the accelerator pedal fully while observing the throttle plates. Make sure the plates open fully. Adjust throttle cable, if necessary. continued ...... Issued 10/26/81
ST-16-10/81
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Microswitch Adjustment
1. Working in the engine compartment with the ignition off, open the
throttle plates to the full throttle position.
2. Loosen the microswitch attaching screws and position the switch
so that it is activated in the full throttle position (See
illustration). Tab B should contact and activate Switch A at full
throttle.
3. Tighten the switch attaching screws.
4. Disconnect wires at microswitch and, using an ohm meter, have an
assistant depress the throttle to the floor and check to ensure
that the microswitch is activated.
ST-16-10/81
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Check Electrical System Connectors
1. Remove cover protecting coil and electrical connectors in right corner
of engine compartment.
2. Locate red electrical gang connector mounted on wall of engine
compartment. (FIG. A)
3. The wiring harness is equipped with connectors for both the manual
transmission (FIG. B) and the automatic transmission (FIG. C).
4. Ensure that the connector applicable to automatic transmission vehicles
(FIG. C) is plugged into the red connector (FIG. A).
ST-16-10/81
-4-
Selector Linkage Adjustment
1. Raise the vehicle on a hoist.
2. Disconnect the gear selector tube "A" from its bellcrank lever
connection "E".
3. Lower the vehicle and place the selector lever in the "P" Park
position. Ensure that the lever locking mechanism is fully seated
and the lever is locked in position.
4. Raise the vehicle and place the transmission in "Park" by thrusting
the selector cable "B" completely forward.
Note: Ensure that the transmission is in the "Park" position by
holding one rear wheel stationary and attempt to rotate the
other rear wheel. The parking pawl should drop into position
and lock the wheel.
ST-16-10/81
-5-
Governor Control Cable Adjustment
1. With an assistant in the vehicle, raise it on a hoist.
2. With the engine turned off, have the assistant depress the accelerator
pedal to the floor (full throttle position).
3. Loosen the cable locknut and adjust the cable sleeve stop "G" at the
governor and to obtain clearance "J" between quadrant arm and the
stop peg "E"/clearance should be: 0.3 - 0.5 mm (0.12 - 0.20 in.)
(See illustration).
ST-16-10/81
-6-
Transmission Fluid Pressure Check and Adjustment
1. Operate vehicle until transmission reaches normal operating
temperature (cooling fans cycling - A/C off). Check and adjust
transmission fluid level.
2. With an assistant in the vehicle, raise the vehicle securely positioned
on a hoist allowing the rear wheels to turn freely.
Caution: Stand clear of rear wheels.
3. Connect the transmission pressure gauge J21867 to the main line
pressure fitting located at the rear of the transmission below the
fluid pump. (Figure 1) Caution: Fluid is hot.
