LegDriver Posted July 26, 2018 Share Posted July 26, 2018 just got a 79 Mack dump truck. whats better to use for tranny. I heard u can use gear oil in tranny too. Anyone have knowledge of this. Quote Link to comment https://www.bigmacktrucks.com/topic/53913-79-mack-transmission/ Share on other sites More sharing options...
0 terry Posted July 26, 2018 Share Posted July 26, 2018 47 minutes ago, LegDriver said: just got a 79 Mack dump truck. whats better to use for tranny. I heard u can use gear oil in tranny too. Anyone have knowledge of this. mack transmission takes gear oil, a fuller takes 50 w. synthetic. terry 1 Quote Link to comment https://www.bigmacktrucks.com/topic/53913-79-mack-transmission/#findComment-403102 Share on other sites More sharing options...
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LegDriver
just got a 79 Mack dump truck. whats better to use for tranny. I heard u can use gear oil in tranny too. Anyone have knowledge of this.
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