Oil Cooler Flow Check

After the new or repaired transaxle has been installed, fill to the proper level with DIAMOND ATF SP III. The flow should be checked using the following procedure:

CAUTION: With the fluid set at the proper level, transmission fluid collection should not exceed one quart or internal damage to the transaxle may occur.

Disconnect the OUTLET line (from cooler) at the transaxle and place a collecting container under the disconnected line.
Run the engine at curb idle speed with the shift selector in neutral.

Fig 1: Cooler Line Connection - 4A/T
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
If transmission fluid flow is intermittent or it takes more than 20 seconds to collect one quart of transmission fluid, replace the cooler.
If flow is within acceptable limits, reconnect the cooler line. Then fill the transaxle to the proper level, using DIAMOND ATF SP III.

Fig 2: Cooler Line Connection - 5A/T
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.