Gearbox Oil Change

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myoldjalopy
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Gearbox Oil Change

Postby myoldjalopy » Sat Mar 26, 2016 10:44 am

Just an idle query really......
Manual says change gearbox oil every 6,000 miles. I left mine go at least 12,000 miles and was very surprised to see how clean the oil was when I drained it.......any thoughts on how often it really needs to be changed?

simmitc
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Re: Gearbox Oil Change

Postby simmitc » Sat Mar 26, 2016 11:34 am

Modern oils are very different from those available when the manual was written. However, for a Minor you should still be using a fairly low-spec 20/50 multigrade that is similar to the old style ones, so I would still go with 6,000 - do it at the same time as you do the engine oil.

myoldjalopy
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Re: Gearbox Oil Change

Postby myoldjalopy » Sat Mar 26, 2016 7:17 pm

OK thanks...........

ampwhu
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Re: Gearbox Oil Change

Postby ampwhu » Sat Apr 09, 2016 6:05 pm

less moving parts in a gearbox. this will be why the oil retains its colour longer.

I change mine every 3 years along with the axle oil and coolant.

I do about 2500 miles a year.

liammonty
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Re: Gearbox Oil Change

Postby liammonty » Wed Apr 13, 2016 11:56 am

ampwhu wrote:less moving parts in a gearbox. this will be why the oil retains its colour longer.
Engine oil discolours because of the by-products of combustion, such as carbon, getting into it past the rings. Gearbox oil doesn't have to deal with this, so doesn't discolour in th same way.

moggiethouable
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Re: Gearbox Oil Change

Postby moggiethouable » Wed Apr 13, 2016 12:24 pm

Far less heat too.
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dalebrignall
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Re: Gearbox Oil Change

Postby dalebrignall » Wed Apr 13, 2016 3:31 pm

i do my gearbox every 2 years and use 20/50
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Trickydicky
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Re: Gearbox Oil Change

Postby Trickydicky » Wed Apr 13, 2016 5:16 pm

Used gearbox oil is also a good rust preventative as it has no acidic contaminants that are in used engine oil.
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amgrave
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Re: Gearbox Oil Change

Postby amgrave » Wed Apr 13, 2016 7:47 pm

Quite right tricky, mix a bit of paraffin with it and brush or squirt it on the underside if not already protected :lol: :lol: :lol:



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