JERRY MINE HAS A CLARKE 5 SPEED ALSO IN THE 50 SOMETHING GMC SERVICE MANUAL IN THE BACK IS A supplement WITH THE CLARKE INFO PM KCMONGO AND HE CAN TELL YOU THE YEAR OF THAT SERVICE MANUAL .I HATE THIS TRANS IT'S REALLY A PAIN .I KNOW THE A-833 4 SPEED O/D IS A BIT SMALL 4 THIS TRUCK BUT I WON'T HAVE IN THERE THAT LONG ,I'LL BE ON THE LOOK OUT FOR A TRUE TRUCK 5 SPEED O/D TRANS .I MIGHT BE LOOKING FOR A DODGE DIESEL TRANS TO COMPENSATE FOR THR REAR DIF LOW GEARING MINE IS A SINGLE SPEED.
PAUL
