These are possibel causes and you should start checking with external components and adjustment as offerred by Jacobandnickolas.
SLIPPING OR ROUGH 1-2 SHIFT
Throttle lever and bracket assembly damaged, not installed properly or T.V. Cable broken or binding. Valve body assembly throttle valve sticking. T.V. Bushing turned in bore. Defective valve body assembly. 1-2 shift valve train, line bias valve, accumulator valve or T.V. Limit valve stuck. Gaskets or spacer plate incorrect,
damaged or not installed properly. Body face not flat.
Defective 2-4 servo assembly. Apply pin incorrect length. Servo seals or "O" ring seals missing or damaged. Restricted or missing oil passages. Case servo bore damaged. Defective 2nd accumulator. Porosity in 1-2 accumulator housing or piston. Piston seal or groove damaged. Nicks or burrs in 1-2 accumulator housing. Missing or restricted oil passages or 2-4 band worn or not positioned properly. Oil pump assembly or case faces not flat.
Saturday, September 24th, 2011 AT 11:46 AM