MAINTENANCE I LUBRICATION Common lubricant SAE 80 Multipurpose Gear Lubricant is used in the manual three speed transmission and differential carrier so no oil seals are used between these units Actually there is some interchange of lubricant but a lubricant dam is formed at the transmission which prevents entrapment of excess lube in the carrier sump which is below the transmission level and maintain transmission lubrication on grades t Oil Level Check Each 1000 miles check the lubricant of the three RRR speed Transaxle by removing the filler plug in the differential carrier If oil is at the level of carrier filler plug both the carrier and transmission lubricant levels are satisfactory If oil is below filler plug add oil to the carrier as required then check the lubricant level in the transmission by removing its filler plug Replenish as necessary CAUTION Under no circumstances should any lubricant containing active sulphur be used Also do not use mineral oil Only SAE 80 I Multipurpose gear lubricant should be used Oil Change At the end of the first 1000 miles and each 10 000 miles thereafter oftener under severe dust or service conditions drain both the differential carrier and SERVICE SERVICE RE All service operations relative to the three speed transmission should be performed with the transmission removed from the vehicle and separated frorr the power train SERVICE OPERATIONSGEARSHIFT LEVER ASSEMBLY Removal from Vehicle 1 Remove tunnel front plate 2 Remove four nuts securing gearshift lever assem bly to floor pan NOTE Two nuts also secure the shift control shaft front mounting bracket On early production vehicles the two rear nuts retain the bracket on later vehicles the two front nuts will retain the bracket b ND ADJUSTMENTS three speed transmission by removing the drain plug provided in each Reinstall the drain plugs and refill each unit to the level of the filler plugs with SAE 80 Multipurpose Gear Lubricant Complete refills require a total of 4 9 pints lubricant approximately 21 2 pints for each unit SHIFT LINKAGE ADJUSTMENT After any service operation in which the shift control rod in the tunnel has been replaced or it has been found that transmission response is improper to the shift pattern adjust the shift linkage It should be noted that the Corvair shift lever position can be tailored to the customer For example if the customer is tall and drives with the seat full rearward the shift linkage can be adjusted so as to minimize the reach for second and reverse by adjusting the linkage as follows with the seat in the customer s normal driving position 1 Shift the transmission to first then loosen the coupling clamp nut fig 6D 3 on the transaiission shift shaft 2 Move the gearshift lever rearward in first until it is resting against the edge of the seat then tighten the coupling clamp nut The shift lever will not touch when a person s weight is on the seat and it should also be noted that the shift throw is longer from neutral to first than neutral to third 3 Test shifts in all ranges OPERATIONS FERENCE GUIDE Transmission controls can be serviced without disturbing the power train and therefore are listed under Service Operations Transmission In Vehicle immediately following TRANSMISSION IN VEHICLE 3 From the driver s compartment lift the gearshift lever assembly up until its studs clear the floor pan then remove the unit by lifting the floor mat at the center of seat Disassembly of Gearshift Lever Assembly Refer to Figure 6D 2 1 Unscrew the knob to remove then clamp the gearshift housing in a vise 2 Using a length of 11 2 pipe or J 5590 depress the retainer plate and rotate until its three lugs clear CORVAIR SHOP MANUAL