I have an 83 bronco with a 4.9L engine and a c6 tranny. I was going through 2-4 quarts of oil a week, so I sat down and took the tranny off the engine to change the rear oil seal. Got it apart and found that when they rebuilt the engine 50,000 miles ago, they just siliconed the oil pan and it fell apart. I had to cut one of the torque converter bolts to get it out because it was rounded off. Got a different torque converter, and started putting it together today. I was able to crank the engine over by hand just fine before I bolted up the tranny, but once I got the tranny and engine put back together, the engine was locked tight. Question is what what happened? I'd rather not take the tranny back off, but I could do if needed to. Hope someone can help.

Justin

1972 Ranger 360 (Grandpa's Truck)
1975 F100 Custom 4x4 360 (My Fixxer Upper)
1976 F150 390 (Grandma's Truck)
1978 F150 351W (Older Brother's-thinks he's a mechanic so why is it sitting??)
1982 F150 XLT Lariat 4x4 351W (Friend's Truck-but he's in MT and it's at my place)
1983 Bronco XLT 4x4 300 (My Daily Driver)