1942 - 1947 Chevrolet Shop Manual



7-14

As soon as the piston starts to move forward, the piston rod yoke pin carries the upper end of the reactionary levers forward. This action results in the upper end of the idler levers, which are pivoted on the pin, being moved backward. This action would tend to move the vacuum valve backward, closing the port and cutting off the vacuum, if the movement of the gearshift lever on the steering column was stopped. Therefore, it is necessary to keep moving the gearshift lever until the shift is completed, so that the force exerted by the vacuum cylinder may move the shifter operating lever forward and shift the gears in the transmission. When the shift is completed, the action described above closes the vacuum valve. The foregoing description applies to the action which takes place during the shift into any gear. The only difference is that the lever system moves in the opposite direction while shifting into low or high speeds. GEARSHIFT LEVER Disassembly To remove the gearshift lever without disturbing the balance of the assembly, shift into reverse gear position, depress the pivot pins approximately 3/32" then lift up on the lever and pull it outward. The gearshift lever anti-rattle spring and pivot pin spring may be removed by removing the pivot pins, compressing the legs of the spring and lifting it upward. Reassembly Before reassembling the gearshift lever, the ball on the control shaft should be lightly coated with graphite grease. Install the anti-rattle		STEERING COLUMN ASSEMBLY Disassembly 1. Disconnect the gearshift control rod from the shift lever by removing the cotter pin and flat washer from the swivel. 2. Disconnect the selector rod from the selector lever by removing the cotter pin and flat washer. 3. Remove the clamp bolt from the gearshift control shaft lever and remove the lever and spring, 4. Remove the horn button or ornamental cap and steering wheel nut. Using steering wheel puller J-I618, remove the steering wheel. (For a description of this puller and its use, refer to "Steering Gear Assembly," Section 9, "Steering Gear Removal" Division.) 5. Remove the nuts and lockwashers from the instrument panel to mast jacket clamp and remove the clamp. 6. Remove the two clutch head screws which attach the gearshift control upper support to the mast jacket. The control shaft and upper support may now be pulled up out of the lower support. 7. To remove the gearshift lever, compress the pivot pins, lift up on the lever and pull it outward. Then remove the pivot pins and anti-rattle and pivot pin springs. 8. Remove the control shaft by pulling it out of the upper support. 9. The gearshift lever swivel may be removed by unscrewing it from the upper support. 10. The gearshift control lower support assembly may be removed from the steering mast jacket by removing the nuts from the lower support clamp.

springs in ball and over neck of control shaft and pivot pin spring in swivel, and thread the pivot pins onto the ends of the spring and into the holes in the gearshift lever swivel. Thread the gearshift lever over this assembly, compress the pivot pins, and, at the same time, press down
on the top of the lever		Fig. 25—Positioning Lower Support Bushing If the bushing in the lower support is worn, it should be pressed out of the lower support and a
until the pivot pins snap	Fig. 24—Vacuum Gearshift Lever Assembly
into place. Fig. 2 4 shows the gearshift lever assembly in cross-section