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:
I'm not telling you the pump controls pressure, I'm telling you a valve can't control pressure if it isn't there. You obviously know the pump capacities of the 68RFE, the flows and pressures required at every RPM and torque demand so why don't you let us in.
Well that is an oxymoron if ever heard of one. If the pump isn't pumping then that means the engine isn't moving, which means the truck isn't moving so there is no use in any of it.
However, you did say and I quote.....
wilber1 wrote:....which is false. The pressure control solenoid can(and does) decrease it's valve size (which increases the pressure) regardless of if the pump is pumping faster or not. The pump can be pumping at a steady state and the pressure control solenoid can still increase/decrease pressure by manipulating flow. Think of turning on a water hose and covering the opening with your thumb. You can increase the pressure of the water coming out even if the pump that is pumping the water did not increase output.
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.
And please don't go into this "well the transmission wouldn't get pressure if the pump didn't do its job" because for that to happen the engine has to be off which defeats the purpose of a vehicle altogether.
So again, please show me where the pump controls pressure like you stated. Again, I can wait......
