Evaluating Wear by ATF

Evaluating Wear by ATF

ATF color

• Yellow color: New ATF.

• Brown color: Used ATF (from approx. 60,000 km).

• Black, ATF smells burned: Malfunction in transmission, e.g. torque converter clutch overheated, clutch lining burned.

Shavings in ATF

• Metal shavings smaller than 0.1 mm diameter up to a maximum of 1 cm 3 at solenoid in ATF oil pan or in ATF are normal.

• Metal shavings larger than 2.0 mm diameter at solenoid in ATF oil pan or in ATF indicate a mechanical malfunction or strong wear in transmission.

Measures for contaminated ATF area

If ATF area is heavily soiled (ATF black or shavings ):

• Completely disassemble and clean transmission.

• Flush ATF oil passages and blow through with pressurized air.

• Disassemble and check all clutches.

• Replace torque converter (cannot be cleaned).

• Replace valve body (cannot be cleaned).

• Replace ATF filter.

• Clean ATF lines and ATF cooler.