Posted by T in NE on February 20, 2014 at 23:47:47 from (75.234.208.31):
In Reply to: Re: Dodge Transmission posted by jimg.allentown on February 20, 2014 at 16:28:55:
The computer in a factory A518 (pre-94 auto OD) truck could run the OD, but not the lock-up. The transmission has one power wire and 2 grounds, the computer switches on the ground side of the circuit. You would need a stand-alone controller, the pressure switches, or a switch inside to manually engage the lock-up. On a factory manual-trans truck, or 3-speed equipped truck, you would need some way to control both.
There are stand-alone controllers that only require tach and TPS. But the pressure switches are a lot cheaper and accomplish the same thing.
Side note: You can make the Allison 1000 work behind another engine, the trick is to use one out of a medium-duty application. Since they had the Duramax or a Cat engine available in it, it picked up tach off an internal sensor instead of the engine computer.
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