TimFBsucker Posted May 6, 2013 Share Posted May 6, 2013 (edited) I have a 1979 Mack R797S with Mack 44,000 rears and TRTXL 1070 12 speed tranny. What oil do I use in the tranny and rears?Tim Green Edited May 6, 2013 by TimFBsucker Quote Link to comment Share on other sites More sharing options...
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