It's sort of the nature of the beast. I've noticed that the 6.7 feels more like a light switch than an accelerator. My old Duramax wasn't that bad. Watch the tire wear at the right rear corner. I know for a fact that I never spun the tires but right rear is worn at least 30% more than the other 3. I like the locking rear diff, if I were stuck in the mud, but the open rear diff is hell on tires (or tire!lol). Give and take
I know about the tire issue. There's even a bulletin from Ford on the subject.
No resolution though other than back off the skinny pedal.
I have the elocker too. Useless if you ask me. That kind of thing is ok for severe duty off-road, but who takes a $62k truck 'wheelin? IMHO Ford's elocker rear diff is useless. Fact is that due to the programming, anything over 35mph it's off anyway. Coming from RC racing, I can say for sure that a spool in the rear is the best way to make a truck handle like crap anyway - makes the rear end very loose, so I can see why Ford turns it off at any kind of speed.
For those that don't know how an elocker works: It's an open differential unless an electrical current is sent to the diff. Then it locks both wheels together = spool. The electrical current comes from a decision the computer makes based on your speed (must be below 35mph) and whatever traction and stability control are deciding. Far as I know it's all decided by the computer. If there's a switch to do this manually, I haven't seen it yet.
No matter what, an elocker is the worst of both worlds.
*open diff most of the time
*spool when locked will cause the rear end of the truck to be very 'loose' and the looser the terrain (like a very dusty dirt road) the worse the truck will handle - rear end will be all over the place
*spools cause severe crab walking which my truck suffers from something terrible. 4low and slow the whole rear end is bouncing around when making a turn (most likely axle wrap due to the tall blocks in the 350.)
*not that it really matters because Ford is not allowing you to control it anyway.
Ford should have offered a Limited Slip in the rear (they do for dualies, but not for SRW), and an elocker up front. For a truck that spends most of it's life on the road a LS is far more useful than a locker. I'll bet 99% of the customers would benefit from a LS.
A Truetrac is on order, should ship any day now. And I'm putting the detroit eLocker up front for that emergency off-road need (will probably never use the thing.)
Sorry for the sidebar. Back on topic. So, y'all think a tuner will help with throttle response huh? I have to wait until I'm sure the truck isn't one of those that suffer from severe mechanical failures first. I may put a tuner on soon, but only in monitor mode. Going to wait until at least 10k before tuning it. Plan is H&S w/ KEM. Just turned 3k today.
2012 F350, 6.7L Diesel, 4x4, SRW, Crew Cab, Short Box, Loaded, Ingot Silver
Detroit Truetrac, Icon leveling springs, steering damper mounts, King reservoir shocks and steering damper, Ultra Predator 22x10 and Nitto Terra 325/50R22 (35"s), H&S Minimaxx & Gearhead, aFe 5" SS w/ muffler, Leer XL, LineX, Titan 50gal, Airlift bags and wireless.