Not really a Peterbilt item, but I had the opportunity to drive a Pete 386 with an MX equipped with the new Allison TC10 TS "automatic" 10 speed. I must say I was impressed with how the transmission operated. This is a twin shaft gearbox that uses a torque converter for starts only. The torque converter multiplies the torque to provide very snappy off-idle starts and then locks up at 4 MPH or less dependant upon load and throttle application, once locked wet clutches shift the five speeds through two ranges to provide 10 speeds.
Very smooth shifts, it will skip gears if lightly loaded, downshifts quickly and in the higher gears almost imperceptively. The truck was geared with a 2.54 rear and the 10th gear is .86 overdrive so a very tall setup. I was 1160 RPM at 65 MPH and could accelerate from that speed smoothly and with good pull. The Allison people say that proper rear axles spec's will be required to prevent torsional issues with such tall gearing but Dana already had rears designed to reduce the issue as does Meritor.
Looks like a useable alternative to automated gearboxes. Allsion says the continuous power application as opposed to an AMT will be a benefit and they claim fuel economy will macth other types of transmissions.
All in all I must say I was impressed althought to be honest they did buy lunch........................
Allison TC10 TS transmission
Discussion in 'Peterbilt Forum' started by PeteSalesGuy, Feb 21, 2013.
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