April 17th, 2015, 11:13 PM
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Member
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Join Date: Feb 2013
Location: northern NY when not flying
Truck: 1968 HM80 with a 478M and a few engines plus a Toro-Flow
Posts: 98
Rep Power: 94
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Re: Allison 6 Speed GMC 401
Quote:
Originally Posted by WE7X
For something like 15 years, I have had an Allison AT from a 6500 or 7500 chassis. Would that likely be an MT40? I know I received a cable shifter assembly with it, that is about 25 feet too short for my rear engine configuration.
If I recall correctly, I was told it would have been a 5 speed, but I am not sure. Were they five speed, or six?
The plan back then, was to put it into my RM7500 'Motorhome', along with a 478M; to replace my 401M and the 5x2 Manual transmission. No progress yet, on that plan.
Rod J
Issaquah, WA
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Allison (under GM) made 4, 5 and 6 speed automatics. The first ones were the MT (Medium Truck) series (30 and 40). They were all six speeds, direct in top gear, and date to the mid 1950's and were produced into the early 70's
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