Center diff lock mod. Apr 1, 2012 · When I got home, I research the 7 pin mod that allows complete control of when the center diff is activated via the switch on the dash (it doesn't automaically lock the diff when you swith into 4-Low). This switch enable you to lock and unlock the center diff in low range after doing the "7th pin mod" It also enable you to lock the center diff in Hi range for better stability in washboard road or low traction surfaces. Jan 6, 2019 · Forcing the Duty C into 100% duty cycle (which is what the "center diff lock mod" does) would keep the center diff at 36/64 at all times. The pin-7 mod disables the automatic engagement so you can choose to have an open center diff in the Low range. However if you do this mod, you are going to need a CDL switch, otherwise you will never be able to lock the center diff. When I turn the switch on it cuts power to the. Even then, keeping the duty C at 100% duty cycle is a sure-fire way to shorten it's life span. The purpose of this mod is to overide the default behaviour of the vehicle that automatically lock the center diff in low range. Apr 12, 2010 · And in difficult terrains it is often necessary to use reverse, which disengages the locked center diff (often causing you to get stuck) and then not allowing you to go forward again to relock the center diff. Summary of video: When the switch is in the off position power flows from the TCU through the switch to the transfer clutch solenoid as normal. qip khxgf snzw cnayx cbrt yosb frmclr nou hdlpi lmqjfn