Mazda RX-8 Manual page 1333

Radiator (In Tank Oil Cooler) Installation Note
1. The automatic transmission oil cooler flushing must be performed whenever a transmission is removed
for service because the existing fluid may be contaminated, and to prevent contamination of new fluid.
NOTE:
Flushing must be performed after installation of the overhauled or replaced transmission.
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2. Follow the instructions in the manufacturer's publication for flushing operation.
Oil Pipe, Hose clamp, Oil hose Installation Note
1. Apply compressed air to cooler-side opening, and blow any remaining grime and foreign material from
the cooler pipes. Compressed air should be applied for more than 1 min .
2. Align the marks, and slide the oil hose onto the oil pipe until it is fully seated as shown.
3. Install the hose clamp onto the hose.
NOTE:
If reusing the hose, install the new hose clamp exactly on the mark left by the previous hose
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clamp. Then apply force to the hose clamp in the direction of the arrow in order to fit the clamp
in place.
4. Verify that the hose clamp does not interfere with any other components.
(w) RX-8 Transmission (Manual & Auto)
Page 308