Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Automatic Transmission
When trouble code about automatic transmission is known on display, carry out the following basic check. After that, carry out the replacement or repair work.
- ATF level check; Refer to AUTOMATIC TRANSMISSION FLUID .
- Differential gear oil level check; Refer to DIFFERENTIAL GEAR OIL .
- ATF leak check; Refer to AUTOMATIC TRANSMISSION FLUID .
- Differential gear oil leak check; Refer to DIFFERENTIAL GEAR OIL .
- Stall test; Refer to STALL TEST .
- Line pressure test; Refer to LINE PRESSURE TEST .
- Transfer clutch pressure test; Refer to TRANSFER CLUTCH PRESSURE TEST .
- Time lag test; Refer to TIME LAG TEST .
- Road test; Refer to ROAD TEST .
- Shift characteristics; Refer to TRANSFER CLUTCH PRESSURE TEST .
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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