Compression Ignition Addict
Join Date: May 2009
Location: In the country south of Covington TN.
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My guess would be a failing synchro. I average 17-19 depending on conditions (3.55 gears) but have gotten 21 on a couple of occasions. I do have a slight leak in the valley somewhere but can't tie it up until I get the clutch put in my TDi. Maybe then I'll be able to crowd 21 again.
Randy DuCharme (Radio AD5GB)
'06 F-250 FX4 A/T Super Cab short box.
SCT SF3 tuner /w Gearhead Performance custom tunes. ARP head studs, EGR delete, oil cooler/drainback tube/STC coupler/blue spring/standpipe & dummy plug upgrades, ScanGauge II, Sinister Diesel coolant filter, Fumoto drain valves, Stage II direct clutch and ECP solenoids.