Gearbox oil
Posted: Tue May 17, 2022 1:12 pm
What oil should I put in my gearbox?
Morris Minor Owners Club
Promoting the Preservation and Use of the Postwar Morris Minor
https://board.mmoc.org.uk/
Gearbox oil
Page 1 of 1
Re: Gearbox oil
Posted: Tue May 17, 2022 2:16 pm
Straight 30 oil - but 20W/50 oil will be perfect.
Re: Gearbox oil
Posted: Tue May 17, 2022 2:38 pm
Thanks 
Re: Gearbox oil
Posted: Tue May 17, 2022 5:17 pm
As above, assuming that it's a standard Minor gearbox and not a conversion with a different box.
Re: Gearbox oil
Posted: Wed May 18, 2022 11:37 am
I'd use a classic grade of 20/50 the modern stuff will not have many of the addatives that made it possible for morris to use an engine oil in a gearbox.
Re: Gearbox oil
Posted: Wed May 18, 2022 1:09 pm
Have a quick think about gearboxes. Particularly Austin/Morris ones.
The mini gearbox was run on engine oil for the whole of its lifespan. That gearbox (much like the minor internals?) coped well with the engine oil - even with combustion contaminants between service intervals.
I suspect that anything specially designated as “classic” is likely to be more ‘marketing hype’ than real, useful information.
The mini gearbox was run on engine oil for the whole of its lifespan. That gearbox (much like the minor internals?) coped well with the engine oil - even with combustion contaminants between service intervals.
I suspect that anything specially designated as “classic” is likely to be more ‘marketing hype’ than real, useful information.
Re: Gearbox oil
Posted: Wed May 18, 2022 1:36 pm
You've never heard of ZDDP then.oliver90owner wrote: ↑Wed May 18, 2022 1:09 pm
I suspect that anything specially designated as “classic” is likely to be more ‘marketing hype’ than real, useful information.
Re: Gearbox oil
Posted: Wed May 18, 2022 2:03 pm
Zinc Dialkyl Ditho Phosphate (ZDDP)
https://www.frost.co.uk/zddplus-anti-wear-oil-additive/
https://www.frost.co.uk/zddplus-anti-wear-oil-additive/
Re: Gearbox oil
Posted: Thu May 19, 2022 9:05 am
Nearly ten thousand miles ago, I switched to Redline MT90 fully synthetic in my bog standard ribbed gear box after the advice of a very experience automotive engineer. It contains all the protective elements required, and changing gear is now like the proverbial 'hot knife through butter' - it's just so much nicer to use than when I used the 'traditional' oil previously. Yes, it is more expensive compared to standard oil, but to me it's paid for itself many times over with the improved gear changing experience.
Re: Gearbox oil
Posted: Thu May 19, 2022 10:27 am
I am also doing the same with a modern gear oil, our gearbox wasn't fantastic to start with but no deterioration since, gear oils are developed specificly for the stresses in a gearbox, while any oil is far better than nothing and reflects what morris had available 50 years or more ago something designed for the job has in my opinion got to be the best option.
Re: Gearbox oil
Posted: Thu May 19, 2022 12:28 pm
Re: Gearbox oil
Posted: Thu May 19, 2022 8:51 pm
Pete Bags wrote: ↑Thu May 19, 2022 9:05 am Nearly ten thousand miles ago, I switched to Redline MT90 fully synthetic in my bog standard ribbed gear box after the advice of a very experience automotive engineer. It contains all the protective elements required, and changing gear is now like the proverbial 'hot knife through butter' - it's just so much nicer to use than when I used the 'traditional' oil previously. Yes, it is more expensive compared to standard oil, but to me it's paid for itself many times over with the improved gear changing experience.
Sounds ace, my gearbox isn’t too bad but I suspect the oil hasn’t been changed in quite awhile since the interior carpets are glued down on top of the filler hole! How much does a standard gearbox hold? £24 per 946ml is expensive enough!
Re: Gearbox oil
Posted: Sat May 21, 2022 5:28 pm
Gearbox capacity is 2.25 pints, so just under 1.3 litres.
Re: Gearbox oil
Posted: Sat May 21, 2022 11:13 pm
Re: Gearbox oil
Posted: Thu May 26, 2022 2:38 pm
I ended up going with 20w50 classic from Halfords. Usually £32 for 5 litres but I had a £10 voucher signing up to Halfords motor club so I got it for £22 which is pretty good value. Yes the MT90 would be a superior oil but I plan on changing mine regularly anyway.