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  1. paulfarber

    MT-1 Gear oil question

    Synthetic oils use a whole 'nutter chemistry to obtain GL-5 compatibility. The cold, hard., ruthless fact remains: Every M35a2 on the plant that has been in goverment service since the mid 80's has had GL-5 oil in every transmission/transfer/differential. Absolutely nothing bad has happened...
  2. paulfarber

    MT-1 Gear oil question

    If you look at the lube order for M35a2 trucks they have been running GL5 since the mid 80's. That means 20+ years of GL5 in the trucks and none of them have suffered from any soft of 'yellow metal failure'.
  3. paulfarber

    MT-1 Gear oil question

    MT-1 is ultra low something... phosphorous or sulfur or something. I think the GL-5/MT-1 is more common that straight GL-5.
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