Re: Bad vacation
My at545 did the same thing, thankfully close to home. I think that the valve body malfunctioned and applied two clutches at once, which is effectively a trans brake, as is done to assist launches in drag racing. It is probably easy to fix to someone familiar with the 545, but I swapped in a Spicer 7 speed manual. This, and changing the axle ratio from 5.38 : 1, to 4.10 : 1, resulted in a mileage increase from 6.8 to up to 10.5, if I drive right and keep it below 65. The 545 does not have a lock up torque converter- bad for efficiency and makes heat. Allison says it's good for up to 445 lb-ft. input torque, but even my little DTA360 has 485 lb-ft. I don't think my failure was at all related to that, though.