AMGeneral Posted April 22, 2019 Share Posted April 22, 2019 Howdy All, First post here, long time Mack lover, first time owner, I have a 1969 R685ST currently set up with a 14 ft Heil dump bed, 285 tip turbine engine, 38k rears with a CRDPC 92 front and CRD 93 rear diffs, both with 6.34 ratio. It has a TRDXL-1070 6 speed, 2 stick trans.... Anyone have any experience with this type of transmission? evidently it is an odd bird as most local Mack guys have never heard of it, and my local Mack dealer is about the same. I am not having any major problems, other than a "whine"? in 5th gear, high range. Fluid is clean and at the proper level, magnets are clean and no difficulty in shifting. Quote Link to comment Share on other sites More sharing options...
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