Variable hydraulic lifters for 440 engine
You got it Wietse
In Park
all oil flow is hemorrhaged to the pan at the manual valve, except a maintenance flow to the convertor,and a small amount is sent to the lube circuit. Line pressure is spec'd to be 5 to 30 psi, depending on idle speed.
In Neutral
the hemorrhaging is stopped and the line pressure is spec'd to be 55psi, with the TC pressure rising to as much as same.
With the engine idling, wheel off the ground;
If your wheels turn in neutral,are hard to stop, dragging the idle speed and vacuum down, then, either
1) the forward clutch is dragging, not by hydraulic pressure, but by warped clutches, and driving thru the rear sprag, or
2) the TC sprag is not working right, or
3) the TC is just really tight
Here is a link I found, and a cool pic
You got it Wietse
In Park
all oil flow is hemorrhaged to the pan at the manual valve, except a maintenance flow to the convertor,and a small amount is sent to the lube circuit. Line pressure is spec'd to be 5 to 30 psi, depending on idle speed.
In Neutral
the hemorrhaging is stopped and the line pressure is spec'd to be 55psi, with the TC pressure rising to as much as same.
With the engine idling, wheel off the ground;
If your wheels turn in neutral,are hard to stop, dragging the idle speed and vacuum down, then, either
1) the forward clutch is dragging, not by hydraulic pressure, but by warped clutches, and driving thru the rear sprag, or
2) the TC sprag is not working right, or
3) the TC is just really tight
Here is a link I found, and a cool pic
