#5r110w transmission p0751 manual#
#5r110w transmission p0751 code#

As soon as the line-pressure circuit was charged, oil started dumping out of the exhaust port. This problem area was discovered by Jeff Parlee, director of product support at Valve Body Xpress, and it was easy to see when run on the valve-body test machine. This bore plug separates solenoid feed (line pressure) and a circuit that is charged in first through fourth gears ( Figure 3). This port is directly below the retainer pocket for the bore plug behind the SR solenoid ( Figure 2 shows the OE bore plug and retainer removed from the valve body). The actual problem is deeper: It is the solenoid feed.įigure 1 shows the locations of S1, S2, S3, S4 and the SR solenoid where you can see an exhaust port deeper in the bore from the SR solenoid. The fact of the matter is that the trouble codes listed really are of no help other than pointing us to the solenoids.

#5r110w transmission p0751 code#

This particular solenoid does not have a performance code connected to it to aid in diagnosis. The significance of the unusual feed system is where our problem lies, because there is another on-off solenoid connected to same oil circuit feeding the solenoids: the SR solenoid. You can count this as your little-known and even less-cared-for fact of the day, but it’s an extremely important one.

#5r110w transmission p0751 manual#

Oddly enough, these 6-speed solenoids are fed regulated, non-orificed line pressure from the manual valve. On-off solenoids typically are fed reduced pressure from a solenoid modulator valve or fed line pressure through a very small orifice to prevent flooding. The trouble area that these three transmissions have in common relates to the feed that these solenoids are provided. The key to diagnosing the problem right the first time is verifying solenoid commands and gear ratios with a thorough road test and capable scan tool.

Immediately throwing new solenoids at the problem can be an expensive mistake if the clutch actually is to blame. This can be a tricky situation, as the same performance codes also can set when a clutch in charge of holding the gear ratio is slipping or neutraling out. As an aid for diagnosis, the TCM will set a DTC related to the solenoid or combination of solenoids responsible for that gear ratio. These types of Diagnostic Trouble Codes (DTC) set when the transmission control module (TCM) commands a specific gear and an incorrect ratio is shown from the input and output speed sensors.