Hello. I did a 100 foot burnout in first gear (C6 auto) and now when I put it back in first it just sits there and seems under load when reving. If driving slow in drive (10 mph) and I put it in first it screeches to a halt. Someone said I welded clutch plates together. There is supposed to be a auto- manual valve body in the tranny as I dont have to shift up the gears for them to change. I put Lucas treatment in there to free valves as suggested. Repair or replace the tranny?
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