Jeep Cherokee

 Service Manual

Transmission and transfer case » AW-4 automatic transmission » Service procedures
Refilling after overhaul or fluid/ filter change

The best way to refill the transmission after a fluid change or overhaul is as follows: (1) If transmission has been overhauled, install transmission in vehicle.

(2) Remove dipstick and insert clean funnel in transmission fill tube.

(3) Add following initial quantity of Mopar Dexron IIE/Mercon to transmission: (4) If fluid/filter change was performed, add 4 pints (2 quarts) of fluid to transmission.

(a) If transmission was completely overhauled and torque converter was replaced or drained, add 10 pints (5 quarts) of fluid to transmission.

(b) Remove funnel and install dipstick.

(5) Operate vehicle until fluid reaches normal operating temperature.

(6) Apply parking brakes.

(7) Let engine run at normal curb idle speed, apply service brakes. Then shift transmission through all gear ranges and back to PARK (leave engine running).

(8) Remove dipstick and check fluid level. Add only enough fluid to bring level to Full mark on dipstick.

Do not overfill. If too much fluid is added, excess amount can be removed with suction gun and plastic tubing. Tubing only has to be long enough to extend into oil pan.

(9) When fluid level is correct, shut engine off, release park brake, remove funnel, and reseat dipstick in fill tube.

Transmission control module (TCM) service

Use the DRB scan tool to diagnose transmission control module function whenever a fault is suspected.

Replace the module only when the scan tool indicates the module is actually faulty.

Checking fluid level

Checking fluid condition

Refilling after overhaul or fluid/ filter change

Oil pump volume check

Flushing coolers and tubes

Aluminum thread repair