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About massmayhem

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    Alberta Canada

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  1. Spent many a hours trying to get 1-2, 2-3, 3-2 and 2-1 shifts to follow commanded as I set for the 68RFEin tow/haul mode in my 2012 using Warp Tuning to no avail. Was driving me mental wanting to stretch out the shifts but they just simply would not happen. As a result of not being able to stretch them out I wasn’t able to get 2nd lockup to occur at decent enough rpm where it wouldn’t cause heavy shuttering to happen during lockup engagement. With these issues, they also occur in the 2013+ models. I have discovered the reason as to why. For the 2010-2012 model years, MADS is pointing to the completely WRONG tables, but not only that, there is NO 1-2 and 2-1 tow/haul mode shift tables from 2010-2012! The 2010-2012 for both normal mode and tow/haul mode use the exact same 1-2 and 2-1 shift tables, there is no separate shift tables between these gears for normal mode and tow/haul. 2013+ model years do however have a separate 1-2 and 2-1 shift tables for tow/haul mode and is not shared with normal mode. However, just like the 2010–2012, MADS is pointing to the WRONG tables for 1-2, 2-1, 2-3 and 3-2 in tow/haul mode. I have the correct tables mapped out and can now have proper control over these shifts in UDC Pro/Warp.
  2. Headlift is a result of excessive in cylinder pressures. Boost, timing, amount of fuel being injected, temperatures are just some of the drivers behind getting headlift.
  3. No trickery with a lockup switch, only modification to the truck is 50hp S&S injectors and custom tuning on the engine and transmission with UDC Pro RT on a Smarty Touch, 2nd gear lockup engaging in Drive! No BS here on this one, true 2nd lockup in drive commanded from the ECM.
  4. massmayhem


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