Mazda MX-6 1998, Workshop Manual, Page: 808 / 1282

AUTOMATIC TRANSAXLE [LA4A-EL]
17. Install a new square head plug in the inspection port.
Tightening torque
22— 26 N m {2.3— 2.6 kgfcm , 16— 19 ft lbf}
Evaluation of line pressure test
Line pressure Possible cause
Low pressure in every position
Fluid level low
Restricted inlet filter
Control valve body, solenoid body or accumulater body is loose
Excessive leakage in pump, case, control bodies
Sticking main regulator valve
Damaged inlet tube seal or inlet filter
Damaged gaskets, separator plate
Higher than specification Problem with main regulator valve, solenoid body and wiring harness
Stall Test
This test is performed to determine if there is slippage at the friction elements or malfunction of the hydraulic
components.
1. Start the engine.
2. Shift the selector lever to D range.
Caution
•
If the accelerator pedal is depressed for longer than 5 seconds while the brake pedal is
depressed, the transaxle could be damaged. Therefore, do steps 2 and 3 within 5 seconds of each
other.
3. Firmly depress the brake pedal with the left foot, and then gradually depress the accelerator pedal with the
right.
4. When the engine speed no longer increases, quickly read the engine speed and release the accelerator.
5. Shift the selector to N position and let the engine idle for 1 minute or more to cool the ATF.
6. Perform a stall test of R position in the same manner.
Engine stall speed
2,200— 2,500 rpm
Evalution of stall test
Condition P ossible cause
Above specification
In D range
Forward clutch
Forward one-way clutch
Low one-way clutch
In R position
Reverse clutch
Low and reverse clutch
Below specification
Engine
Torque converter one-way clutch
7.
Turn off the engine.
Time Lag Test
This test measures time lag as a means of checking the hydraulic components and the friction elements.
1. Start the engine.
2. Warm up the engine until the ATF reaches
66
—
77
"C
{1 5 0
—
170
°F}.
3. After normal operating temperature is reached, shift the selector from N position to D range.
4. Use a stopwatch to measure the time it takes from shifting until engagement is felt. Make three
measurements for each test and average the results.
5.
Perform the test for the following shifts in the same manner.
• N position - » R position
0 5 -1 7 A -3