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anyone have a zf6 with 3.55 or 3.31?
my 6.4 has 3.73 ratio and I've been thinking about switching them out. the first three gears run out quick when i get on it and also its sitting at about 2000 rpm at 70-75, the gears are great for towing but it would be nice to have a little lower rpm on the highway. Does anyone have the zf6 with 3.55 or 3.31, how do you like it, how does it tow, how is the daily driving around town, on the track? Thank you for any input guys it is appreciated
08 F-350 6.4 Lariat FX4 ccsb, southbend single disk, Spartan, egr delete, 4" turbo back, afe intake