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Discussion Starter · #1 ·
There seems to be quite a lot of old threads on changing gearbox oil when upgrading clutch to SMF and reduce rattling noise on idle, to use a thicker oil, problem most oils discussed are American so has anyone got a recommendation on where to source suitable alternative 75W90HD over here, this seems to be the grade and slightly thicker. Also GL4 is mentioned quite a bit ... But there are so many and does it do the job.. :(
 
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