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You must always remove the filler first. If you remove the drain first, then cannot remove the filler you are stuffed.....Well look up how much oil your gearbox takes and then undo the drain plug at the bottom of the box it may have a magnetic end check to see if there are any metal flakes on it,buy a new washer for this plug,remove the filler plug which will be around halfway up the box and the oil you have bought will be in plastic bottles with a spout just pour squeese the oil into the filler hole,until you have the right amount of oil in the box,refit filler plug and thats about it.if you are doing this on your driveway try and get the car up and level and also make certain the container you have to catch the old oil is big enough.
Manual gearbox oil usually lasts for a very long time.ive been told there is no benefit to changing the oil, is this true?
i will keep you posted as the job is this weekend.I've thought about doing my manual box and the diff as it's nearing 70,000 miles. The oil in both is thinner than you might think. The diff oil spec is clear enough and easily obtained in the form of 75W85 TITAN SINTOPOID FE or Gulf Syngear PC 75W85. The gearbox is less straight forward as it takes a very thin oil of ATF like viscosity. I think it's important not to use ATF though as you need a proper Manual Transmission oil with the correct friction modifiers. There are very few options with Castrol FE 75 being the only one that I've been able to find.
Stevq,
Curious to know what oil you used and how tight you found the filler and drain plugs to be.
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