For manual transmission be sure to use fluid with an API GL-4 rating.
You should inspect the manual transmission gear oil at 7,500 miles or 6 months (12 months or 15,000 miles 1980 and later), at this point you should correct the level or replace the oil as necessary. The lubricant level should be even with the bottom of the filler hole. Hold in on the filler plug when unscrewing it. When you are sure that all of the threads of the plug are free of the transaxle case, move the plug away from the case slightly. If lubricant begins to flow out of the transmission, then you know it is full. If not, add the correct gear oil as necessary.
DRAIN & REFILL
It is recommended that the manual transmission/transaxle fluid be changed every 30,000 miles if the vehicle is used in severe service. You may also want to change it if you have bought your car used or if it has been driven in water deep enough to reach the transaxle case.
- Run the engine until it reaches normal operating temperature then turn key to the OFF position.
- Jack up the front of the car and support it on safety stands level, if necessary to gain access.
- Remove the filler plug from the left-side of the transmission or remove the speedometer cable from the transaxle, to provide a vent.
- The drain plug is located on the bottom of the transmission/transaxle case. Place a pan under the drain plug and remove it.
- Allow the oil to drain completely. Clean off the plug and replace it. DO NOT OVERTIGHTEN PLUG.
- Fill the transmission/transaxle with gear oil through the filler plug hole. Use API service GL-4 gear oil of the proper viscosity. This oil usually comes in a squeeze bottle with a long nozzle. If yours isn't, use a plastic squeeze bottle (the type used in the kitchen). Refer to the "Capacities" chart for the amount of oil needed.
- The oil level should come up to the edge of the filler hole. You can stick your finger in to verify this. Watch out for sharp threads.
- Replace the filler plug or speedometer cable. Lower the vehicle, dispose of the old oil in the same manner as old engine oil.
- Test drive the vehicle, stop and check for leaks.