Oil Cooler Flow Check

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

CAUTION: With the fluid set at the proper level, A/T 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.

Fig 1: Disconnecting OUTLET Line (From Cooler)
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Run the engine at curb idle speed with the shift selector in neutral.
If A/T fluid flow is intermittent or it takes more than 20 seconds to collect one quart of A/T 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 or equivalent A/T fluid.