1.Drive the vehicle until the A/T fluid temperature rises to the normal operating temperature [70 - 80°C].
note The A/T fluid temperature is measured with M.U.T.-III MB991958 (M.U.T.-III sub assembly).
note If it takes some amount of time until the A/T fluid reaches its normal operating temperature [70 - 80°C], check the A/T fluid level by referring to the left diagram.
2.Park the vehicle on a level surface.
3.Move the selector lever through all positions to fill the torque converter and the hydraulic circuits with fluid, and then move the selector lever to the "N" position.
4.After wiping off any dirt around the dipstick, remove the dipstick and check the condition of the A/T fluid.
note If the A/T fluid smells as if it is burnt, it means that the A/T fluid has been contaminated by fine particles from the bushings and friction materials. Transmission overhaul and cooler line flushing may be necessary.

5.Check A/T fluid level is at the "H" mark on the dipstick. If the A/T fluid level is less than this, add DIA QUEEN ATF J-2 until the level reaches the "H" mark.
note If the A/T fluid level is too low, the oil pump will draw in air along with the A/T fluid, which will cause to form bubbles. If the A/T fluid level is too high, rotating components inside the transmission will churn the fluid and air into a foamy liquid. Both conditions (level too low or too high) will cause the hydraulic pressure to drop, which will result in late shifting and slipping of the clutches and brakes.
note In either case, air bubbles can interfere with normal valve, clutch, and brake operation. Also, foaming can cause A/T fluid to escape from the transmission vent where it may be mistaken for a leak.
6.Securely insert the dipstick.
note The A/T fluid should always be replaced under the following conditions:

  • When troubleshooting the transmission.
  • When overhauling the transmission.
  • When the A/T fluid is noticeably dirty or burnt (driving under severe conditions).