Mazda MX-6 1998, Workshop Manual

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AUTOMATIC TRANSAXLE [GF4A-EL]
P Position Test
Shift into P position on a gentle slope, release the
brake, and verify that the vehicle does not roll.
Evaluation
C o n d itio n P o ssib le Cause
No 1 -2 up- or downshift
Stuck shift solenoid A
Stuck 1-2 shift valve
No 2 -3 up- or downshift
Stuck shift solenoid B
Stuck 2 -3 shift valve
No 3 -4 up- or downshift
Stuck shift solenoid C
Stuck 3 -4 shift valve
TCC non operation shift
Stuck torque converter clutch control solenoid valve
Stuck torque converter clutch control valve
Incorrect shift point
Misadjusted throttle position sensor
Stuck shift valves
Stuck accumulators
Excessive shift shock or slippage Stuck or no one-way check orifice
Worn clutches, brakes, or one-way clutch
No engine braking effect Worn clutches or brakes
AUTOMATIC TRANSAXLE FLUID (ATF) INSPECTION [GF4A-EL]
W 6 U 5 1 7 W 1 6
ATF Condition Inspection
One way of determining whether the transaxle should be disassembled is by noting:
1. If the ATF is muddy or varnished.
2. If the ATF smells strange or unusual.
ATF Condition
C o n d itio n P o ssib le cause
Clear red
Normal —
Light red (pink)
Contaminated with
water
• Broken oil cooler inside of radiator
• Poor breather hose installation
By water contamination, problem could be occurring to parts
inside of transaxle. It is necessary to overhaul transaxle and
detect defected parts.
If necessary, exchange transaxle.
Reddish brown
Has burnt smell
and metal specs
are found
Deteriorated ATF
Defective powertrain components inside of transaxle.
Specs cause wide range of problems by plugging up in oil
pipe, control valve body, and oil cooler in radiator.
• When large amount of metal specs are found, overhaul
transaxle and detect defective parts. If necessary,
exchange transaxle.
• Implement flushing operation as there is a possibility to
have specs plugged in oil pipe and/or oil cooler inside of
radiator.
Has no burnt smell Normal Discoloration by oxidation
0 5 -1 7 B -8