Did your builder install the 1-2 Accumulator Valve Spring that came with the kit. Mine did the same thing,this's a vid on there about how bad is was, I have to pull the valve body and install the stock spring. If most don't know the 1-2 accumulator valve spring is small about one inch long, that controls the line pressure going to the 1-2 accumulator on the side of the case. I had to install a new spacer plate and not drill out 2nd gear hole, install stock 1-2 accumulator valve spring, install stock accumlator springs with no washers, with stock tranny pressure in tune just to get mine to shift ok, still barks 2nd wot. I think it is my carbon firber band.
the 1-2 valve spring is 370 or you may have the valve 372 upside down witch would cause very hard 2nd apply
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