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There's a reason the military killed the 939 series. AM General made the wining design but the government gave later production of that design to BMY-Harsco who did a really bad execution of design cost-reduction, kind of like Stewart&Stevenson with the LMTV drive-train design issues. Even ABS...

This tripped me the heck out since I was just writing a post in this thread discussing Allison Automatic options for an ISX swap - got my thread mixed up (where's the post I just did!!). In general, it's my belief that the MT654 and HT740 share the external case part, so I think (check the...

Anything with an SAE #1 flywheel that put out 445HP or less at 1400ft-lbs or less peak torque. Really common in the private sector too - my Bus has one. One thing to watch for - the lock-up clutch on the military version is aggressive, this is why they had to put anti-lock brakes in the M939...