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Showing content with the highest reputation on 06/11/2022 in all areas

  1. Jumping out of gear is because of bad bearings on the main shaft. As torque is applied to the shaft it moves and kicks the stick out of gear. Basically most likely using too thin of fluid and allowing it to overheat. Max trans temp should be no higher than 220°F. Yes you should install a trans temp gauge but do not install fast coolers because it moves the temp sensor too far from the gears and will show cooler. But the fluid around the gears is still hot.Temp sensor must be as close as possible to the gear teeth for proper temp measurement. Mine I bung close as possible to the PTO gear. I've seen my last trans over 240°F towing my RV to Pittsburg Landing near Oregon. I was only running 15 MPH on dirt road running 7% grade. Even my heat shield in place. Even running downhill didn't cool because of reverse torque running down hill. This is why trans temp is required and why fast cooler should not be used.
  2. This diagram shows the 2 signals that the speed sensor in the VP produces. The tone wheel on the pump shaft has 6 index regions spaced every 60 degrees. The index teeth have 2 wider then normal teeth with a deeper cut between them. In the diagram notice there is a unique alignment where the B phase is falling below the zero cross dashed line and the A phase is above the line. When the software detects this condition it resets a timer and edge counters. The injection starts at edge 19. By measuring the time between tooth edges, velocity and acceleration can be calculated. Then applying kinematic equations we can predict edge 19 before it happens. We have to do this because the injection solenoid has deadtime so it has to be energized some time before the injection event is to occur.
  3. As you drive your truck for the next few days, make sure the steering wheel movement is very free in the straight ahead position. If steering feels like it is hanging or sticky in the straight ahead position, the adjustment is too tight. Too tight can also stress the worm gear drive assembly that interfaces with the ball nut. The adjustment you made sets a minimal clearance between the sector shaft and the ball nut and this adjustment must be done with the steering gear centered - not necessarily the steering wheel centered. When done properly, a preload will be established between the sector shaft and the ball nut with steering gear centered. When the steering gear is turned either left or right from center the preload will disappear and the clearance will grow. This is normal. Usually, this adjustment is done on the bench and the drag is measured with an inch-pound torque wrench on the steering input shaft to establish the correct preload as the steering gear passes over center. It is fine to make the adjustment on the truck, but one must remember there is no real feel for the proper setting because the steering wheel input and the pitman arm output (with associated steering linkage) will mask the feel of the expected drag when the steering gear is passing over the center position. You may already know this..., but, just in case you don't. - John
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