P0741

cbxer55

Active Member
Jan 25, 2020
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P0741 is the code for the transmission torque converter clutch locked off. I've been having a blinking OD OFF light for some time. I noticed it only does it when OD is engaged. If I drive it with the OD off, it doesn't occur. However, in OD I see the tach moves excessively when accelerating. So it's apparently not locked up. Friend has a transmission shop a mile from where I live. He told me to drive it til it starts blinking, then stop by and leave it running. Hooked up a scan tool and got the P0741 code. I told him it was likely a solenoid, which he said that wouldn't be the case. However, when I did a Google search on it, there are two solenoids that could be the problem and they are top of the list. So, I'll be taking it to his shop to have it fixed. Hopefully we can get this done soonest.

I just replaced the stupid plastic thermostat housing with a really nice metal one on Saturday. Was having a lot of little pissant leaks in that area. Made the engine compartment messy. Finally got that fixed, no more leaks. Was able to go back to a 16 pound radiator cap (I had a 10 pound one on there the last couple months), now on to the transmission.
 
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cbxer55

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Jan 25, 2020
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Oklahoma
Cars in my friends transmission shop today. Getting all new solenoids, and while he's in there he is going to install a shift kit for me. He says these particular transmissions were not one of Ford's greatest designs, and that they really do benefit from a good shift kit. So we'll see. Should have it back tomorrow.
 

cbxer55

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Jan 25, 2020
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Oklahoma
Well, changing the solenoids didn't help. Started blinking within two miles of the transmission shop. Way faster than it has ever come on before. Now the shop guy says it's likely the torque converter itself. Think I'm just going to put a piece of black tape over the damn thing and keep driving it. It drives and shifts fine.
 

cbxer55

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Jan 25, 2020
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Odd. Very odd! Drove it to work today and it never blinked. On the way home, jumped on I-40 west bound and started cruising at 70 mph. The tach was locked steady at 2000, couple hundred rpms less than it has been as of late. Started playing the throttle, the tach barely moved. Evidently the lock up happened and it was holding steady. Will take it for a drive the next couple days, long cruise on the highway, see if it maintains. If so, then apparently it is either a delayed reaction to the repairs, or whatever was wrong fixed itself. I guess we'll just see, won't we. LOL!

There was mention in several articles on P0741, that wiring could be damaged. Could it be, that with the major coolant leak I had, coolant sprayed all around the engine bay, that something got wet that didn't like being wet. And since the coolant leak is fixed, it dried out and is doing what it's supposed to do?
 

cbxer55

Active Member
Jan 25, 2020
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Oklahoma
What about the shift kit?
Truthfully, can't tell it's there unless the pedal is on the floor. Otherwise, it feels the same. The shift from second to third was always kind of mushy. It's not now. But a valve body change, which us Lightning owners always do, would probably give it that kick most of us want.
 
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