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I've heard the 4M40 is not so reliable as 4D56 is.

For what it's worth.... the local MMC dealer here (OZ) says the 4AM40 is more reliable - one reason being a timing chain rather than a belt.


89 3L V6 5spd SWB, Aisin Manual Hubs, 2 (suspension) seater Raider in Wheeler, OR