engine brake while towing?
OK, so just getting a feel for towing my 5er with the 2013 Ram Cummins. When tow enabled (heavy tow used with appropriate tire pressure) and engine brake on, going downhill after taking foot off gas ...
Forum Discussion
wilber1 wrote:
The amount of pressure the pump can provide is limited by RPM regardless of what a control valve does. A valve can only regulate available pressure.
Please learn a thing or two about a modern electronic controlled transmission and how they shift before responding again because this is starting to get old. The pump makes the pressure, and the pressure control valve/solenoid regulates how much of that pressure is being used. You can electronically increase the amount of pressure (by closing the valve) used to make a transmission shift more firm or decreased the amount of pressure(by opening the valve) used to make the transmission shift smoother. Sort of like putting a restriction on a garden hose. This why tuners can make a trucks shifting more firm without even changing a pump or any other part just by controlling the line pressure psi of the pressure controller.
The EPC Electronic Pressure Control Solenoid
wilber1 wrote:
What does that have to do with line pressure? With a manual clutch, the speed at which you engage it has nothing to do with how much pressure it can apply, that is determined by the diaphragm or springs in the in the pressure plate and can't be changed. Whether you drop the clutch or slip it, once it is engaged, the pressure it applies is the same.
Again, you did not understand my reference in how line pressure from the pressure control solenoid dictates how smoothly or firmly the internal transmission clutch are applied just how your foot controls how smoothly or firmly a manual transmission clutch is applied. They both apply the same principals. Slowly disengaging a manual clutch will cause the clutch to slip more until it finally catches making a smoother shift just like having less line pressure causes the transmission clutches to slip and finally catch. Quickly engaging a manual clutch will cause less slippage resulting in a firmer shift just like increased line pressure causes the transmission clutches to clamp together more quickly with less slippage. I don't get how this is hard to understand.
