Quote:
Originally Posted by jsceash
I maybe sending you on a wild goose chase because I'm not sure what is available in the UK. That said I use Valvoline Syn Power Full Synthetic 75W 90, Hypoid recommendation meet recommendations for API GL-4 and GL-5, MT-1
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Just so you know, GL-5 is suitable in differentials so ancient that they called for GL-4.
It is, however, NOT suitable in transmissions where GL-4 is specified.