Compression Ignition Addict
Join Date: May 2009
Thanked 2 Times in 2 Posts
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6.4.23 empty creates a vicious, neck-snapping, trailer surge at about 40-45
this is what i learned from someone else ...."changing the firmware to 6.4.26 (for the "surging issues fix" identified in the history log), and change tranny tunes to S1M (to get rid of the 4th gear lockup but keep the higher shiftpoints).""The results were AWESOME! Towing was silky smooth at all speeds. Towing both the 10.5k 5-er and a bumper-pull with about 10k worth of tractor "
2008 6.4 job3 F250 3:55 gears 10K gvw silver stretchcab 8ft box.timbrens and goosenek hitch.51 gal aux tank.