Compression Ignition Addict
Join Date: Aug 2011
Location: Full-Time Camper in Ca.
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We've got a 6th gear now so it's not nearly as bad as it used to be with overdrive. If you want it to drive the same performance wise it's:
3.31 for 18" rims and 32" tires
3.55 for 20" rims and 34.5" tires
3.73 for 20" rims and 37" tires
You'll definitely notice the decreased power though when you're towing 15k if you only run the 3.55's on 37's because of all the extra weight from those tires. The truck still has plenty of power to do it even in stock form, I'm not saying you can't at all just saying it will pull better with more gear.
OK gotcha, thanks for the info.
2015 F-350 CCLB DRW, Lariat Ultimate,
2nd Gen. 6.7L "Scorpion" Turbo Diesel,
440HP/860TQ, Torque Shift 6-speed,
Tuxedo Black W/Charcoal Black Int.,
14,000 LB GVWR,
3:73 Gears W/Limited Slip,
17" Polished Forge Alum. Wheels,
BFG All-Terrain Tires,
Factory 5th Wheel/Gooseneck Prep Pkg.,
Spray In Bed-Liner,
Supplemental Cab Heater,
FX4-Off Road Pkg.,
Engine Block Heater,
9025 Lbs. on the CAT Scales.
"Mack Daddy Scorpion!"