Jeep CJ 1945-1970 Repair Information

Automatic Transmission



The fluid level in automatic transmissions is checked with a dipstick in the filler pipe at the right rear of the engine. The fluid level should be maintained between the ADD and FULL marks on the end of the dipstick with the automatic transmission fluid at normal operating temperature. To raise the level from the ADD mark to the FULL mark, requires the addition of 1 pt. (0.473L) of fluid. The fluid level with the fluid at room temperature (75°F) should be approximately 1 / 4 in. (6mm) below the ADD mark.

In checking the Automatic Transmission Fluid (ATF), insert the dipstick in the filler tube with the markings toward the center of the vehicle. Also, remember that the FULL mark on the dipstick is calibrated for normal operating temperature. This temperature is obtained only after at least 15 miles (24 km) of expressway driving or the equivalent of city driving.

  1. With the transmission in Park, the engine running at idle speed, the foot brake applied and the vehicle resting on level ground, move the transmission gear selector through each of the gear positions, including Reverse, allowing time for the transmission to engage. Return the shift selector to the Park position and apply the parking brake. Do NOT turn the engine OFF , but leave it running at idle speed.
  3. Clean all dirt from around the transmission dipstick cap and the end of the filler tube.
  5. Pull the dipstick out of the tube, wipe it off with a clean cloth, and push it back into the tube all the way, making sure that it seats completely.
  7. Pull the dipstick out of the tube again and read the level of the fluid on the stick. The level should be between the ADD and FULL marks. If fluid must be added, add enough fluid through the tube to raise the level to between the ADD and FULL marks. Do not overfill the transmission because this will cause foaming and loss of fluid through the vent.

Use only Dexron® or Dexron®II transmission fluid.


See Figures 1, 2, 3, 4 and 5

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Fig. Fig.