COSMO-I HAVE THE SAME TRANSMISSION AS YOU IN MY 62 CHEVY 1/2 TON FLEETSIDE. I AM HAVING TROUBLE IN THAT THE TRANS SLIPS OUT OF HIGH ON A SLIGHT HILL SOMEWHERE AROUND 60 TO 65 MPH. ANY IDEA AS TO WHAT CAUSES THIS?I TOO DO NOT HAVE A SYNCHO FIRST GEAR. I TRY TO DOWN SHIFT TO LOW BEFORE I COME TO A COMPLETE STOP-PREVENTS GRINDING EVERY TIME!


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