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SportTrac Discussion
Engine & Drivetrain
Transmission shifting (Solved)
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<blockquote data-quote="Lou M" data-source="post: 983768" data-attributes="member: 60944"><p>Scheduling a trans flush and fill next week.</p><p></p><p> In talking with my transmission shop owner, he indicated that this is a common problem with the 5R55 units. He was surprised that the 6R60 had it too. Something to do with the OD servos wearing the OD servo pin holes out of round and fluid not keeping the correct pressure when downshifting.</p><p></p><p> I did take him for a drive. And as soon as it happened, he knew the problem. His first recommendation was to flush and service (as you all recommended). Then see what happens.</p><p></p><p> Due to the mileage (70K) he suggested a complete rebuild rather than use the old parts if the problem is still there. He would inspect the servo pin holes while into it and repair if necessary. He also recommended a beefier torque converter due to the V8.</p><p></p><p> During my talk with him, he showed me a 5R55 unit, where the servos are, and the repair kit that they use on them. Looks like they over bore the ovalized pin hole then insert a bronze bushing. A very patient/knowledgeable guy. Supports race trucks in Baja.</p><p></p><p> Will let you all know the outcome after the fluid flush.</p><p></p><p></p><p></p><p>Lou...</p></blockquote><p></p>
[QUOTE="Lou M, post: 983768, member: 60944"] Scheduling a trans flush and fill next week. In talking with my transmission shop owner, he indicated that this is a common problem with the 5R55 units. He was surprised that the 6R60 had it too. Something to do with the OD servos wearing the OD servo pin holes out of round and fluid not keeping the correct pressure when downshifting. I did take him for a drive. And as soon as it happened, he knew the problem. His first recommendation was to flush and service (as you all recommended). Then see what happens. Due to the mileage (70K) he suggested a complete rebuild rather than use the old parts if the problem is still there. He would inspect the servo pin holes while into it and repair if necessary. He also recommended a beefier torque converter due to the V8. During my talk with him, he showed me a 5R55 unit, where the servos are, and the repair kit that they use on them. Looks like they over bore the ovalized pin hole then insert a bronze bushing. A very patient/knowledgeable guy. Supports race trucks in Baja. Will let you all know the outcome after the fluid flush. Lou... [/QUOTE]
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SportTrac Discussion
Engine & Drivetrain
Transmission shifting (Solved)
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