Norton 750 transmission fluid

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Northdakota

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New to Norton’s, wondering what kind of transmission fluid does a 71 750 commando take? Thank you for your help.
 
Northdakota said:
Thank you! Can you please describe what exactly is the difference between GL4 and GL5?
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The main difference between GL-4 and GL-5 gear oils is the amount of EP additives. Sulphur/Phosphorus containing products are used as EP-additive. This additive has the purpose to prevent the occurrence of micro-welds on the gear flanks at the local high temperatures which prevail in EP circumstances (temperatures well in excess of 800℃!) GL-5 has roughly twice the amount of EP additives compared to GL-4, which is why it is often used in high-pressure circumstances such as in a front axle and rear axle differential.

Sulphur/Phosphorus additives however have an unfavourable property: they can react aggressively towards bronze and copper. This can be disastrous for the synchromesh rings of a gearbox. Therefore it is not recommended to use GL-5 in a gearbox unless the manufacturer allows this.
 
gortnipper said:
The main difference between GL-4 and GL-5 gear oils is the amount of EP additives. Sulphur/Phosphorus containing products are used as EP-additive. This additive has the purpose to prevent the occurrence of micro-welds on the gear flanks at the local high temperatures which prevail in EP circumstances (temperatures well in excess of 800℃!) GL-5 has roughly twice the amount of EP additives compared to GL-4, which is why it is often used in high-pressure circumstances such as in a front axle and rear axle differential.

Sulphur/Phosphorus additives however have an unfavourable property: they can react aggressively towards bronze and copper. This can be disastrous for the synchromesh rings of a gearbox. Therefore it is not recommended to use GL-5 in a gearbox unless the manufacturer allows this.
Click to expand...
Thank you so much for the in depth explanation! This really helps
 
i only said what's the best oil to see if i could get another oil war going actually i use RedLIne Heavy Shockproof trans oil in all my bikes and the 68 MGB have used it for years works great for me
 
alan hodge said:
i only said what's the best oil to see if i could get another oil war going actually i use RedLIne Heavy Shockproof trans oil in all my bikes and the 68 MGB have used it for years works great for me
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I take offense to that.
 
alan hodge said:
i only said what's the best oil to see if i could get another oil war going actually i use RedLIne Heavy Shockproof trans oil in all my bikes and the 68 MGB have used it for years works great for me
Click to expand...
trans oil? TRANS OIL??? This PC/Diversity madness has to stop!!....
(Would that be a MGQGBT?)
PS: There's probably a: 'gender fluid' or 'help finding gender neutral' joke in there too, but maybe a step too far...
 
Last edited:
Astroglide?? Sounds like a good name for a new 'Marvel' type 'Superhero'... Not too sold on his catchphrase, though.
 
Apologies to the OP for a thread derailment which appears to have ended up at the back door....
Might be of use for those pesky isolastic rubbers, perhaps?
 
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