TRANSMISSION
Light-duty service requires transmission servicing (fluid drained and refilled, bands adjusted) every 37,500 miles. Under normal heavy-duty conditions, service transmission every 24,000 miles. Vehicles subjected to severe heavy-duty conditions should have transmission serviced every 12,000 miles.
TRANSFER CASE
Light-duty service requires transfer case servicing (fluid drained and refilled) every 37,500 miles. Under normal heavy-duty conditions, service transmission every 36,000 miles.
- Check fluid level with vehicle parked on level surface, engine idling at normal operating temperature and parking brake applied. Move selector lever through all gear ranges, ending in "N".
- Fluid level when warm, 85-125°F (29-52°C), should be between 2 dimples on dipstick. Fluid level when hot, 180°F (82°C), should be in the "OK" crosshatched area of dipstick. Check condition of fluid for contamination or burned smell.
With vehicle in level position, remove filler plug and check fluid level. Add lubricant If level is below bottom of filler plug hole.
It is important that the proper lubricant be used in transmission. Mopar ATF Plus automatic transmission fluid Type 7176 should be used. Fluids of the type labeled Dexron-II should be used only if the recommended fluid is not available.
TRANSFER CASE (NP-205)
Engine oils labeled for API Service SG or SG/CD with a SAE 30 viscosity grade should be used.
TRANSFER CASE (NP-241 & NP-231)
Fluids of the type labeled Mopar ATF Plus type 7176, or Dexron-II are recommended.
- Raise and support vehicle. Loosen oil pan bolts. Tap lightly on one corner of pan to break loose, and allow fluid to drain. Remove pan. Install new filter on bottom of valve body. Torque filter retaining screws to 35 INCH lbs. (4 N.m).
- Clean oil pan. Ensure magnet (if equipped) is over boss in right front corner of pan. Install pan with new gasket. Torque oil pan bolts to 150 INCH lbs. (17 N.m).
- Refill transmission with 4 qts. (3.8L) of recommended fluid. See «RECOMMENDED FLUID»(ref-55978-S26567258442001011700000) . Start engine and allow to run at idle for at least 2 minutes. With engine at curb idle and parking brake applied, move shift selector lever through all ranges, ending in "N".
- Add fluid up to 2 dimples on dipstick. DO NOT overfill. Recheck fluid level when transmission reaches normal operating temperature. See «CHECKING FLUID LEVEL»(ref-55978-S13722447982001011700000) .
Raise and support vehicle. Position drain pan under transfer case. Remove drain and fill plugs. Drain lubricant. Install drain plug. Tighten drain plug to 40 ft. lbs. (54 N.m). Remove drain pan. Using recommended lubricant, fill transfer case to bottom edge of fill plug opening. See RECOMMENDED FLUID . Lower vehicle.
A-727 (5.9L DIESEL)
- Start engine and let it warm to operating temperature. Adjust idle speed if necessary. Using gauge, check clearance between rear of cable actuating pin and end of slot in throttle pressure cable.
- Clearance should be .180" (4.57 mm). If clearance is okay, cable adjustment is correct. If clearance is not as specified, proceed to next step.
- Release cable lock pawl. Insert gauge between cable actuating pin and end of slot in cable. Slide cable forward or rearward to obtain specified clearance. Press cable lock pawl down until it snaps into locked position. Recheck clearance.
EXCEPT A-727 (5.9L DIESEL)
- Start engine and let it warm to operating temperature. Retract Idle Speed Control (ISC) actuator with Chrysler's Diagnostic Readout Box (DRB-II), or with jumper wires. If DRB-II is not available, go to step 3). If DRB-II is used, connect tester to diagnostic connector in engine compartment.
- Start engine and place DRB-II in THROTTLE BODY MINIMUM AIRFLOW test. Disconnect electrical connector on ISC actuator. Turn engine off and disconnect DRB-II tester. DO NOT leave DRB-II connected to diagnostic connector. Actuator is now fully retracted and transmission throttle rod may be adjusted. Go to step 4).
- If DRB-II is not available and jumper wires are used, turn engine off. Disconnect electrical connector at ISC actuator. Connect one jumper wire between negative battery terminal and top pin on ISC actuator. Connect other jumper wire between positive battery terminal and second pin on ISC actuator. Disconnect jumper wires after 5 seconds. ISC actuator is now fully retracted. Go to next step.
- Raise and support vehicle. Loosen swivel lock screw. (Scheme 68) Ensure swivel is free to slide along flat end of throttle rod so preload spring action is not restricted. Disassemble and clean parts to assure free action, if necessary.
- Hold transmission lever firmly forward against internal stop and tighten swivel lock screw. Adjustment is complete. Linkage backlash is automatically removed by preload spring.
- Lower vehicle. Reconnect ISC actuator electrical connector. Reposition ISC actuator for normal operation. Turn ignition on for a minimum of 5 seconds. DO NOT start engine. Turn ignition off. Actuator is now positioned for normal operation.