If it's idling in neutral/park at that speed, it sounds like you've got a definite problem with the converter. Before you do anything else, try this- - - - -jack up one rear wheel so the axle can turn when you drop it in gear, and see if you can avoid the stall by letting the axle turn, then apply the brake gradually to see where the in-gear idle speed goes. It should settle down at 550-600, somewhere in that range. Instead of buying some ridiculously expensive converter from Summit, try Dacco converters in Cookeville. They've been rebuilding converters for at least 25 years, and they have a line of high-performance converters with higher than standard stall speeds. Dacco is a manufacturter, but I'm reasonably sure they will have a distributor somewhere in the Knoxville area. Their Middle Tennessee distributor is Nashville Transmission parts, but there's bound to be one for the East Tennessee area. You might want to try to find a converter with a 2,000-2,200 RPM stall speed.
Try these guys:
Knoxville Phone: 866-754-1245
ABC Trans Parts
1037 Wray Street
Knoxville, Tennessee 37917 Fax: 865-546-1744
Jerry
