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Old 03-08-2019, 11:06 AM   #4 (permalink)
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Originally Posted by Piotrsko View Post
So default condition is lock up in 4 th gear with no power applied to the solenoids ?
Great question! I should have been more clear about the default lockup and shifting function. Default operation with no power applied to any solenoids is torque converter unlocked and trans in 4th gear. To lock the torque converter, power must be applied to the lockup solenoid.

Also, if any solenoid is simply unplugged, the PCM goes into limp mode and keeps the trans in 4th gear unless the shifter is put in 2. Does that make sense?
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