Originally posted by Parallax I don't know whether they are in Ford pickups or not, but Allison is not Ford's competitor anymore. Allison doesn't make pickups, nor are they owned by someone who does.
Allison never made pickups, but after GM finally came up with a decent diesel engine for pickups, i.e. the Duramax, they needed a transmission better than the automotive one that had seen service in the gasoline powered pickups. So they turned to the Allison transmission division to modify the medium duty automatic for use behind the Duramax.
It was a good move, to be sure, as Dodge had lots of trouble with the early ISB powered pickups with their automatic, as well as Ford.
I guess the consumers want a pickup that is more like a car than a pickup, and using a clutch and shift lever is too much bother. After all, they have power steering, power brakes, air conditioning, electric windows and power door locks, high end stereos and even heated leather seats.
So why would they want to be bothered with shifting?
(Me? I don't own a vehicle with an automatic. Autos are for girls and lazy people.
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Originally posted by Parallax I don't think it was an issue even when GM owned them. In the 80s I drove a 2 1/2 ton armored car made by ford. Wanna guess who made the transmission?
Commercial and military vehicles are custom built to the customer's specifications. Ford may have supplied the chassis, but the company that built those vehicles under the government contracts built the rest. The contract likely required the automatic tranny and since Allison was the only supplier in North America at the time, that is the transmission that was used.
Like VoiceOfReason mentioned, the F450 and F550 trucks can be had with an ISB. Those trucks fall into the medium duty class, and are generally built to order. Since the Cummins ISB is not built by Dodge (Chrysler, Fiat, Mercedes, or whoever owns them anymore, I really have a hard time keeping up), and because they are built to a customer's specification, and because the ISB is a far better engine that International (the Powerstroke is built by International for Ford) has to offer at the moment, is stands to reason that the ISB would be an option.
When you get into medium and heavy duty vehicles, many combinations are possible. The mount at the back of the engine comes in one of 5 sizes, and is called SAE Bell Housing. The bigger the housing, the smaller the number. The Medium duty Allison transmission (like the ones used in pickups, RV's and other vehicles like the 2 1/2 ton military rigs) uses the SAE 3 housing.
The heavy duty Allison transmissions fit an SAE 2 housing.
You will find Allison automatics in millions of medium and heavy duty vehicles. But to find one in the light duty offerings of GM's competitors has not been one of them.