1942 - 1947 Chevrolet Shop Manual



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	Checking 4-Speed Transmission Lubricant Quantity When a check is made of transmission lubricant when the job is cold, the level should be about one inch below the bottom of the filler plug opening. When at operating temperature the lubricant level will rise to bottom of the filler plug opening due to expansion of the lubricant under these conditions. When checking, or adding lubricant to a warm job, the level should be just to the bottom of the filler plug opening. Lubricant Changes - While seasonal changes of the lubricant are not required, it is recommended that the housing be drained and refilled with the recommended lubricant at least twice a year, or every 6,000 to 10,000 miles. It may be necessary and desirable to drain rear axles and transmissions in trucks subject to severe service more frequently than recommended above. *CAUTION-Use a light flushing oil to flush out the housings when draining. Do not* use water, steam, kerosene, gasoline, alcohol, etc. UNIVERSAL JOINT LUBRICATION PASSENGER CAR AND 1/2 TON TRUCK The universal joint is directly connected to and receives its lubrication from the transmission. The universal joint housing should be filled through the speedometer driven gear hole, for initial lubrication after a repair operation. This initial lubrication is necessary to take care of the universal joint until normal lubrication takes place from the transmission. NOTE-The pipe plug in the top of the front universal joint housing on the 1/2-ton optional 4-speed transmission is for manufacturing purposes and is used to fill the universal joint at the time of assembly. 3/4 AND 3/4 TON SPECIAL (125-1/4" WHEELBASE) MODELS (3-Speed Transmission)** The front universal joint, immediately to the rear of the transmission is of the trunnion bearing type and receives its lubrication from the transmission. Additional lubrication at this point is unnecessary. The battery ground strap bolt hole in the housing is used to fill the front universal joint	at the time of assembly and after a repair operation. NOTE-The pipe plug in the top of the front universal joint housing on the 4-speed transmission (optional equipment) is for manufacturing purposes and is used to fill the front universal joint at the time of assembly. The intermediate and rear universal joints are the needle bearing type equipped with lubrication fittings, and should be lubricated with the same type of lubricant used in the transmission. CAUTION-Under no consideration should any of the soap type of greases-such as chassis lubricant, fibrous universal joint lubricants, etc. -be used. The propeller shaft slip joint, located at the rear of the intermediate universal joint is also equipped with a lubrication fitting and should be lubricated with chassis lubricant. 3/4 TON LONG WHEELBASE PANEL-ALL HEAVY DUTY 1-1/2 TON (INCLUDING SCHOOL BUS CHASSIS) AND ALL CAB-OVER-ENGINE MODELS The front and rear universal joints of the C.O.E. 109-1/2" truck and the front, intermediate and rear intermediate universal joints of the other models listed above, are of the needle bearing type equipped with lubrication fittings and should be lubricated with the same type lubricant used in the transmission. CAUTION—Under no circumstances should any of the soap type greases—such as chassis lubricant, fibrous universal joint lubricant, etc.—be used. The propeller shaft slip joints are equipped with lubrication fittings and should be lubricated with chassis lubricants. FRONT WHEEL LUBRICATION It is necessary to remove the wheels to lubricate the ball bearings. The bearing assemblies should be cleaned, and the bearing ball retainer packed with a high melting point front wheel bearing grease. NOTE-For Cab-Over-Engine Truck front wheel bearing lubrication use soft smooth grease. Fibrous or viscous types of lubricant must not be used. Do not pack the hub between the inner and outer bearing assemblies nor the hub cap, as this excessive lubrication results in the grease working out into the brake drums and lining.