Re: twin-ultamatic

Posted by mikec On 2009/6/9 14:24:22

the coverter will lock in low, though im not sure of the rpm. There are some back roads around here with very steep hills, and its fun to use L with the converter locked to engine brake down.

The chrysler A518 isnt alot different than a 727 with overdrive. there a fine transmission behind a stock engine, but a modified Cummins 6BT can really put a hurting on it fast. A stock 6bt has roughly AT THE FLYWHEEL 190-200 HP and 400ft lbs torque, which is nearly the same as our 374 Packard V8. That being said, both the 727 and 518 both came from the factory with a torque converter far more suited to gas engine use than the diesel, so i think an A518 would live happily behind a stock 374. If you wanted to go even a bit further, a good converter, shift kit, and cooler would be a powerhouse combination. There are dodge/ Cummins sites out there that will have good instructions on how to rig up a potentiometer to controll overdrive for the 518.

I wouldnt trust a 47rh unless it had been set up right.