Transmission
Check fluid at every engine oil change. Under normal conditions, manufacturer does not recommend fluid changes based on vehicle mileage. Use the TECH-II scan tool program to monitor transmission fluid condition. See TECH-II manufacturer's instructions. Under severe conditions such as repeated short trips, rough roads or dusty conditions, change oil and screen at 20,000 mile intervals.
Transfer Case
Check lubricant level every 7500 miles. Replace lubricant at 30,000 mile intervals.
Scheme 46
- Transmission is not equipped with a dipstick. Ensure vehicle is level, with engine running at idle and parking brake applied. Ensure fluid temperature is less than 90°F (30°C). Move gear selector through all gear positions, ending in "P" position.
- Let engine idle for 3 minutes and open overfill screw on bottom of pan. Transmission is filled through overfill screw. Fluid will seek correct level and excess should flow out from overfill screw. (Scheme 46)
Remove fill plug from rear of passenger-side transfer case. Fluid level should be even with fill plug hole. Add fluid if necessary. Install fill plug.
Use Dexron-III ATF on all applications.
Use engine oil SAE 5W-30 for operational temperature range up to 95°F (35°C). Use SAE 15W-40, 20W-40 or 20W-50 for operational temperatures greater than 50°F (10°C).
Remove drain plug to drain transmission pan. Install and tighten drain plug. Remove OVERFILL screw and fill transmission through OVERFILL screw opening. Adjust fluid level as necessary. See CHECKING FLUID LEVEL . Install OVERFILL screw to transmission. Tighten screw to specification. See TORQUE SPECIFICATIONS .
Remove drain plug from bottom of transfer case. Drain fluid. Install drain plug. Remove fill plug. Fill transfer case with fluid until fluid is even with fill plug hole. Install fill plug.
MODE SWITCH
Place selector lever in "N" position. Remove selector lever from mode switch. Remove cover from mode switch. Loosen switch mounting bolts. Align slot in switch housing with slot in selector shaft bushing. (Scheme 47) Insert a 3/32" diameter alignment pin into both ports and rotate switch body to feel for proper alignment. Tighten 2 mounting bolts to specification. See TORQUE SPECIFICATIONS. Remove alignment pin before moving selector lever.
Scheme 47
SHIFT CABLE
Ensure cable movement is not restricted and cable housing is routed so it does not bind. Place gear selector lever in "P" position. Pull lock tab out of adjust end of cable (at transmission). Ensure transmission is in Park and push lock tab into adjust end of cable.
SHIFT LOCK CABLE
Key lock system prevents ignition switch from being placed in LOCK position unless gearshift lever is in "P" position. Shift lock cable is connected between gearshift lever and ignition switch. When gearshift lever is placed in "P" position, ensure ignition switch may be placed in LOCK position. If ignition switch cannot be placed in LOCK position, perform the following shift lock cable adjustment
- Place ignition switch in LOCK position. Ensure gearshift lever is in "P" position. Remove console components for access to shift lock cable at gearshift lever.
- Disconnect cable adjustment lock on outer cable at mounting bracket noting position for installation. see scheme 5 Pull outer cable rearward to check motion. Reconnect cable adjustment lock.
- Check system operation as follows: Gear selector should not move out of "P" position with ignition switch in LOCK position. Gear selector should move out of "P" position with ignition switch in ON position only when brake pedal is pressed. Ignition switch can only be moved to LOCK position when gear selector is in "P" position. If conditions are not as specified, readjust shift lock cable or check connector wiring and brake switch operation.