1942 - 1947 Chevrolet Shop Manual



	*7-20*

	top holes support the transmission during this operation and prevent damage to the clutch disc. 6. Remove the transmission and place it in the transmission bench stand. DISASSEMBLY OF THE TRANSMISSION (1/2, 3/4 and 3/4-Ton Special Trucks) 1. Mount transmission in holding fixture. 2. To remove the gearshift lever, slide the open side of the K-353 gearshift lever remover and replacer over the lever, engage the lugs of the tool in the open slot of the retainer, Fig. 34. Then press down on the tool and turn it to the left to disengage the lugs on the retainer. Lift the lever out of the cover.	9. The bearings can be removed from the main shaft and from the clutch gear by supporting the inner race of each bearing on an arbor press and pressing on the end of the shaft until it is free of the bearing. Fig. 35 is a layout of the four-speed transmission parts. This figure shows the back end construction for Hotchkiss drive (items 31, 32 and 33) as used on the 3/4-ton long Wheelbase panel and all 1-1/2-ton trucks including Cab-Over-Engine models. INSPECTION After the transmission has been completely disassembled all parts should be thoroughly washed in clean gasoline or cleaning solvent and inspected for wear or damage. All bearings should be thoroughly cleaned, oiled with light engine oil, and checked for scored races or worn balls or rollers. To check the bearings for excessive looseness or for roughness, hold the inner race in one hand and turn the outer race slowly in the other hand. DO NOT spin bearing with compressed air. COUNTERSHAFT AND IDLER GEARS Should it be necessary to replace the gears on the countershaft, the old gears should be pressed off on an arbor press and the new gears pressed on the shaft. When reassembling the gears to the countershaft, care must be used to place the gears in correct position on the shaft and also to install the three spacers in their proper place between the gears. The chamfered side of the second-speed gear faces the low-speed gear. The chamfered side of the third-speed gear faces the chamfered side of the reverse gear. The illustration, Fig. 36. shows the order in which the gears are pressed on the shaft.

	Fig. 34—Removing Gearshift Lever 3. Remove the transmission cover assembly and place the transmission in two gears at once to lock the shafts. 4. Remove the speedometer driven gear and shaft and with a long shank wrench remove the capscrew holding the universal joint to the rear end of the transmission main shaft. Remove the universal joint; then remove the capscrews holding the rear bearing retainer and remove the retainer from the transmission case. 5. Remove the clutch gear bearing retainer and drive out the clutch gear and bearing, using a soft steel drift to avoid damaging the teeth of the gear. 6. Remove the main shaft pilot bearing and drive out the main shaft and bearing through the rear end of the case. Remove the sliding gears. 7. Drive out the reverse gear idler shaft from the front to the rear and remove the reverse idler gear. 8. Drive the countergear to the rear to remove the rear bearing and its retainer. Remove the countergear and drive out the countershaft front bearing and retainer by tapping lightly around the outer race of the bearing.

		36.—Countershaft and Gears