engine brake while towing?

ShinerBock wrote:

wilber1 wrote:


Because flow is an issue. the pump doesn't just operate clutches, it is also responsible for lubricating and cooling the transmission. It feeds the torque converter and moves fluid through the cooler. That requires flow.

Flow is not an issue in the normal transmission operation that we are talking about. You are making it one because you want to change the subject so you won't have to admit you were incorrect. In fact, you keep making more incorrect statements.

Also, the pump does not directly operate the clutches. Like I have been saying, it is the pressure control valve/solenoid that controls pressure which controls the clutch operation. For the love of God man, you just keep digging yourself in a deeper hole with your incorrect statement. From this day forward, I would advise that no one in this forum should take any information that you state as correct.

No, the transmission pump does not directly control when the transmission has a delayed shift wit its rpm's. No, the transmission pump does not directly operate the clutches. Why on earth do you keep saying these false statements when I have repeatedly proved that they are not true with factual data and you have yet to provide any evidence of your sayings? I guess it is the same reason why you keep trying to change the subject.

Look, I have never said any of those things. The link you provided said that the pump provides enough pressure under most conditions and I believe that but it also means there are some conditions where it doesn't. Neither you nor I know what those conditions are.

I am only responding to your claim that a valve can increase pressure when all it can do is manage the pressure produced by the pump.

If you have a pump turning 1000 rpm circulating 5 gallons per minute at a system pressure of
150 psi, the only way you can increase pressure is to restrict the flow to the whole system or increase pump speed. A valve in the system can only control the amount of pressure drop, while maintaining flow in the rest of the system, it can't increase pressure beyond what is already there.

You use the analogy of the garden hose. If the static pressure in your water system is 100 PSI, as soon as you open a tap, system pressure drops. You can reduce that drop by putting your thumb over the end of the hose. That will increase the velocity of the reduced amount of water coming out of the hose but the pressure on the back of your thumb will always be less than 100 PSI as long as water is flowing. It can't be any more because the amount it can flow at a given pressure is limited by the size of pipe feeding your system, just as the output of a pump is limited by its speed.

Anyway, this thread has been derailed enough.