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    CD4E air check

    Thanks for input. I’m inclined to doubt it’s a drum problem since both drums leak about the same, but then again neither are new, so who knows. I did not have a way to measure ID of drum hub but both look smooth and good. Ford dealer wants $440 for new OEM drum so I’m not intending to go that...
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    CD4E air check

    The ATSG manual says “do not apply air pressure” for the converter clutch bypass circuit (that exits out the end hole of the pump support shaft). So perhaps I need to ignore the fact that air escapes from this circuit out the pump gear ports. See attached photo. Even if that’s the case, still...
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    CD4E air check

    Thanks. I have watched his videos many times and he is a big help. I have tried to listen to his air test vid but the audio during his test is just not helpful. I will message him and see what he says and share here. Also I do expect less than perfect seal in air tests. As a novice I just don’t...
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    CD4E air check

    Rebuilding a CD4E from an ‘08 Escape. Someone didn’t pay attention to line up oil holes at the direct drum bushing with the reverse clutch hub, and ruined the bushing. Also a weld broke on the direct shell, may due to high line pressure? Anyway I completely rebuilt and added valve body...
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    4l60e stator bushings and p1870 slip code

    SOLVED! I installed a new bushing and new turbine shaft/input drum. The P1870 code is gone and TCC slip is back to acceptable levels at lockup. Appears that the bushings are vital to allowing the teflon rings to seal on the turbine shaft. It was a long journey and I learned a lot. It would...
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    4l60e stator bushings and p1870 slip code

    Could the line pressure results posted in my OP give us a clue about the problem being in the pump vs the valve body? 80 psi idle/120 psi cruising at 2000 rpm.
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    4l60e stator bushings and p1870 slip code

    I'm getting the sense that you don't think the rear stator bushing wear is bad enough to cause the problem...and that it may still be the valve body...
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    4l60e stator bushings and p1870 slip code

    No, only the TCC Isolator & Regulator Valve Kit, as well as accumulator pistons. I had just figured since someone before me tried the whole Transgo kit, then I tried a different valve body with Sonnax regulator/bore, it was unlikely to be VB.
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    4l60e stator bushings and p1870 slip code

    Thanks for the input. The valve body was from an ebay seller. But it was definitely reamed and has a Sonnax valve installed in the reamed regulator bore. New solenoids. I suppose the AFL bore could be wore but surely not on both the old and new body both. Do u mean the check ball in the end...
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    4l60e stator bushings and p1870 slip code

    MAKE: Chevy MODEL: S-10 Blazer YEAR: 1999 MILES: 140k ENGINE: 4.3 I have a p1870 transmission torque converter slip code. Poor mpg. Bluetooth scanner with Torque app shows 150+ TCC slip on level ground and steady mph. Also a slight amount of fluid leaks from small tranny vent tube while...