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Home >> Jeep >> 2021 >> Gladiator Mojave, Part Time T/Case Control, Automatic Trans >> Repair and Diagnosis >> Transmission >> Transmission Control Systems >> 8HP50/850RE Automatic Transmission (Service Information) >> Standard Procedure >> Check Fluid Level >> Notes

Check Fluid Level: Notes

To properly check and fill the transmission, perform the following procedure:

WARNING:

There is a risk of accident from vehicle moving when the engine is running. Secure vehicle to prevent it from moving. There is a risk of injury from contusions and burns if you insert your hands into the engine when it is running. Do not touch hot or rotating parts. Wear properly fitted work clothes.

CAUTION:

A unique transmission fluid has been developed for this transmission. This fluid is NOT compatible with ATF+4 or any other current FCA US LLC transmission fluid. For specifics about this unique fluid see FLUIDS, LUBRICANTS AND GENUINE PARTS.

NOTE:

Oil dye is not required to find leaks in the 8HP transmission. The oil dye can cause shift quality issues and is not recommended. The 8HP fluid has illuminance that is visible under a black light. 

  1. Raise and support the vehicle on a level hoist  . Refer to HOISTING, STANDARD PROCEDURE .
  2. Start the engine. The engine must continue to run for the entire test.
  3. Using a diagnostic scan tool or the Electronic Vehicle Information Center (EVIC), verify that the transmission fluid temperature is below 30°C (86°F).
  4. Disable the Electronic Stability Control (ESC).
    GC0200790Courtesy of CHRYSLER GROUP, LLC
    1 - Fill Plug
  5. Remove the transmission fill plug from the right rear of the transmission case.
  6. Add transmission fluid until it trickles from the transmission fill plug opening.
  7. Install the transmission fill plug.
  8. Lower the vehicle for access to inside of the vehicle, leaving the tires at least 8 inches off the ground.
  9. With the brakes applied, place the transmission in REVERSE and hold for 5 seconds.
  10. Place the transmission in DRIVE and hold for 5 seconds.
  11. Release the brakes, slowly accelerate to 2nd gear and hold for 5 seconds.
  12. Apply the brakes and place the transmission in NEUTRAL.
  13. Raise the engine speed to 2000 RPM for 5 seconds.
  14. Return the engine to idle and place the transmission in PARK.
    NOTE:

    A full transmission will have fluid at the transmission fill hole with the transmission between 30°C (86°F) and 50°C (122°F). Do not over fill.

  15. Remove the transmission fill plug and allow excess fluid to drain from the transmission fill hole or add fluid as necessary.
  16. Install the transmission fill plug.
  17. Remove the support and lower the vehicle.
  18. Using a diagnostic scan tool, clear any Diagnostic Trouble Codes (DTC).

TORQUE SPECIFICATIONS 

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