Automatic Transmission/Transaxle: Service Precautions

PRECAUTIONS WHEN SERVICING FULL-TIME 4WD VEHICLES
The full time 4WD Corolla Station Wagon is equipped with two types of transaxle - either the manual transaxle or the automatic transaxle. The center differential system of the manual transaxle is the mechanical lock type. The center differential system of the automatic transaxle is a hydraulic multiplate clutch control type.

When carrying out any kind of servicing or testing on a full-time 4WD in which the front or rear wheels are made to rotate (braking test, speedometer test, on-vehicle wheel balancing, etc.), or when towing the vehicle, be sure to observe the precautions given below. If incorrect preparations or test procedures are used, the test cannot be successfully carried out, and may be dangerous as well. Therefore, before beginning any such servicing or test, be sure to check the following items:

(1) Center differential lock type
(2) Center differential mode position
(3) Whether wheels should be touching ground or jacked up
(4) Transmission gear position
(5) Maximum testing vehicle speed
(6) Maximum testing time

Also be sure to observe the following cautions;

(1) Never accelerate or decelerate the vehicle suddenly.
(2) Observe the other cautions given for each individual test.