StructEngineer Posted November 20, 2019 Share Posted November 20, 2019 2010 X Forester with about 215,000 miles. My torque converter lock up clutch is disengaging and throwing a 0741 code only on long uphill grades on the interstate. AT fluid has regularly been changed with Subaru fluid, and I know its not overfilled. I did a drain/fill to inspect the fluid and it didn't look charred or anything. I changed the ATF oil pan about 40,000 mi ago due to excessive corrosion and I didn't note any wiring issues at that time. The fact that it's only failing on uphill grades suggests to me that either: 1. The duty B solenoid is getting weak and not supplying enough pressure to the lock up clutch. I see an aussie youtube video about this 2. Lock up clutch is bleeding off pressure somewherd. Is there anything else you think I can check for? I think i may try living with it for awhile, but want to prepare if this is gonna need a rebuild. Link to comment Share on other sites More sharing options...
Rampage Posted November 20, 2019 Share Posted November 20, 2019 Pretty much what you said. You could check the pump pressure and see what it is. A friend of mine that has a transmission shop will check the pressure on some vehicles while driving it. Check the plug on the tranny harness for corrosion on the pins. Here is a good article on that code. https://www.700r4transmissionhq.com/p0741-subaru-forester/ Link to comment Share on other sites More sharing options...
1 Lucky Texan Posted November 21, 2019 Share Posted November 21, 2019 checking the fluid while idling, on level ground? (occasionally someone doesn't know that) Link to comment Share on other sites More sharing options...
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