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    5R55E low Line pressure, slipping while in gear

    Hi James - I will run the test tonight and see what happens. But I'm not sure why it would matter if I can get higher pressures at WOT? I know the pressure gets high enough to produce torque when I rev the motor to over 3,000 RPM, but the truck used to be able to back up into my driveway at idle...
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    5R55E low Line pressure, slipping while in gear

    Hi James - thanks for the reply! I was going to test stall pressures, but I noticed that the specification for reverse is 282-350 psi, and the gauge I bought only goes up to 300 psi... so I was concerned that the gauge might get damaged. I should also mention that my first guess at this problem...
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    5R55E low Line pressure, slipping while in gear

    Hello all. I have a stock 99 Ranger 4.0L OHV 4x4 with 5R55E transmission. It currently has 202,000 miles and rebuilt the transmission back in 2010 when it had 150,000 miles. I did this because the reverse band broke, but when I rebuilt I also did the Sonnax kit on the valve body. Recently I...
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