Assembly Procedure

Verify that there is no air leakage when applying compressed air through the oil hole opposite the return spring.
Verify that there is air flow when applying compressed air through the oil hole on the return spring side.
Air Pressure
1. 390 kPa {4.0 kgf/cm ² , 57 psi} max.
Fig 1: Verifying Air Flow
Courtesy of MAZDA MOTORS CORP.
Replace the forward clutch component if damaged or malfunctioning.
Apply ATF to the O-ring.
Install the O-ring to the piston.
Install the forward clutch piston to the drum.
Install the spring and retainer component and snap ring.
Install the SSTs to the forward clutch drum.

CAUTION:

Depress the piston return spring only enough to install the snap ring. Overpressing will damage the retainer component edges.

Compress the spring and retainer component.
Install the snap ring.

Fig 2: Installing Snap Ring
Courtesy of MAZDA MOTORS CORP.
Remove the SSTs .
Install the drive and driven plates.
Install the direct clutch hub and outer snap ring.
Install the forward clutch drum onto the 4GR case.
Using a dial indicator, measure the forward clutch piston stroke applying and releasing the compressed air as shown.
Air Pressure
1. 390 kPa {4.0 kgf/cm ² , 57 psi} max.
Stroke
1. 1.40-1.60 mm {0.056-0.062 in}
Fig 3: Measuring Forward Clutch Piston Stroke
Courtesy of MAZDA MOTORS CORP.
If measured value is not within standard range, use either 1.8 mm {0.07 in} or 2.0 mm {0.08 in} drive plate to adjust it to standard value.
Remove the outer snap ring, direct clutch hub, and drive plate.
Install the snap ring.
Apply petroleum jelly to the thrust bearing and race.
Install the forward clutch hub.
Install the drive plate, direct clutch hub, and outer snap ring.
Install the thrust bearing and bearing race to the forward clutch.