| Depends on how you run your DMAX. if you tow a lot, no more then 30k on synthetic ( which allison recommends anyways) 15k on petro, if you have high HP and trans mods and like to run hard a lot I wouldnt event think of running a petro ATF. 18k on petro 25k on syn. Normal usage on occasion tow something, lay with the 4x4 a littlebit, daily driver 50k. Allison says you can go 100k on highway use, i use my tranny for "severe service" stop and go stuff like that. just remeber the cooler the tranny rins the longer life span it should have. |