ALLISON REBUILT MT643 - Reassembly + DYNO test. AT545 Swap.

  / jaxaustin   | Shop my Amazon Store: https://www.amazon.com/shop/jaxaustin Vlog #511: Allison MT643 rebuild and reassembly. This at545 to mt643 swap needs bigger cooler lines, a shortened driveshaft, and a muffler modification. Richard at AZ Transmission and Engine Exchange walks us thru the process, and I mention what you will need if you attempt this conversion. The MT643 has lockup torque converter in 3rd and 4th, so all the power is transferred to the wheels with a 1:1 connection. Theoretically, the international t444e could get better milage and more power going up a hill on the freeway.

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