Early cars had a dipstick in the filler hole, which was on the tunnel
under the dash. Later cars have the filler plug in the side of the
transmission, and yes, you are supposed to fill it until it overflows.
FWIW my transmission seems to weep a small amount of oil, just enough to
keep the bottom shiny. Not really sure where it comes from, and it
doesn't have much effect on the level.
Stephen J Piepenbrink had this to say:
>A question,
>
>I have a 79 MGB with an oil leak that seems to be coming from the
>gearbox. It is not from the engine because that level doesn't go down.
>
>My question is on how to tell when the gearbox oil level is correct.
>When I changed the oil in the gearbox a month or so ago I just added the
>3 quarts of oil recommended in the owners manual. The oil didn't run out
>the filling hole as it would on the differential.
>
>Is filling the gearbox until the oil runs out of the filler the right way
>to gauge the level?
>
>Also, in filling the coolant level. I understand that looking in the
>overflow tank is not a good way to check the level of the coolant. How
>does one check it when there is no cap on the radiator. Through the plug
>at the top of the thermostat?
>
>Thanks for all your input. I am learning a lot here as I have only had
>my car since this spring! But I enjoy every minute I can get to drive
>the car.
>
>Steve
>
>
--
Max Heim
'66 MGB GHN3L76149
If you're near Mountain View, CA,
it's the red one with the silver bootlid.
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