Charles find you a transmission man who knows the difference between crap and apple butter. The one you're presently dealing with has no clue if he's depending on Jasper for his info. The L460E in your truck isn't all that complicated as long as you have an understanding of the electronic control system and is easily diagnosed. As you now know, changing the converter was nothing more than a stab at the wind. Find yourself a local trans shop that actually builds their own transmissions and let them diagnose it for you. Could be, and probably is, as simple as a faulty solenoid or relay.
Lloyd if it makes you feel better to fight with these folks then by all means continue to do so because that is likely the only satisfaction you will receive. The usual corporate response is that up to 1 quart in 500 miles is not considered excessive. It is all about perception and they hold all the cards. Besides, if they fixed your's they would then have to fix millions of others and we as taxpayers simply can't afford it.
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