Best case scenario for DTC P0741

[Atman246]

The first thing i would do is check history which would mean talking to the gentleman you bought from. Find out if his brother ever had issues like this. If not, then the other thing to look into is what fluid did the servicing shop use. These transmissions use mercon 5 semi synthetic. The older fluids don't mix with the new ones. Fluid level is also a factor as was previously stated. Did the servicing shop drop the pan and change the filter? If so,they could have bungled a connector for the tcc solenoid,or loosened the connector to the outside of the trans too.The latter is not likely as you would have other issues within the trans as well. Although flushing the trans fluid is good,i always dropped and cleaned the pan and changed the filter. A good trans shop should have a service tool to test the solenoids. They basically put power to them and listen for an audible click. If i remember correctly,the solenoids are a pack and not individual. Might be an expensive venture to repair,parts can be pricey. If it's just the solenoid pack,at least the trans wouldn't have to be removed. Worse case would be the torque converter lock up itself which would mean pulling the trans to replace the torque. I would lean towards a wiring or fluid issue if it just started. Should be a relatively easy fix. And yes,i am an ex transmission man,hence the name. Hope this helps,good luck. Keep us posted. Robin.

 

[Atman246]

You can tell if the torque is locking up,but it can be very hard. You'd need to get onto a long open road,and start from a stop and watch the tach as you're accelerating. Not hard accelerating,just normal driving from a stop. You can actually see the trans shifting gears as the tach drops at each shift. The last drop after going through all the gears would be the torque converter lock up. Being out of the game for 12 years, i'm not sure of how many gears are in these new fangled trannys. I believe they are six speeds,so you should see seven rpm drops. I know i'll get flak for this statement,but you might ask at a Ford dealer too. I had an issue with my 07 having a bump downshift coming to a stop,and it was a software update that cured it. Go figure,new fangled stuff..

 

[JExpedition07]

Mercon LV only in your transmission. I doubt the friction modifier they added created any negative effects on yours. Mine was Mercon SP which I changed over and it's shifted better but I've gotten a weird clunk on downshifts coming to a stop. May be on a slow descent on the way out who knows.

 

[Jennifer Fradella]

You can tell if the torque is locking up,but it can be very hard. You'd need to get onto a long open road,and start from a stop and watch the tach as you're accelerating. Not hard accelerating,just normal driving from a stop. You can actually see the trans shifting gears as the tach drops at each shift. The last drop after going through all the gears would be the torque converter lock up. Being out of the game for 12 years, i'm not sure of how many gears are in these new fangled trannys. I believe they are six speeds,so you should see seven rpm drops. I know i'll get flak for this statement,but you might ask at a Ford dealer too. I had an issue with my 07 having a bump downshift coming to a stop,and it was a software update that cured it. Go figure,new fangled stuff..

So a little while ago,today, as I was taking off from a stop, it looked like the RPMs shuddered briefly around 1500 again then drove as normal. What does that sound like?


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[JExpedition07]

So a little while ago,today, as I was taking off from a stop, it looked like the RPMs shuddered briefly around 1500 again then drove as normal. What does that sound like?


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Sounds like your describing a normal upshift. There are six gears the truck runs through until it hits overdrive where the rpm will drop then rise again. Once in gear 6 that's the 2nd OD gear.

 

[Atman246]

Hey guys,like i said before,it might be worth your while to ask at a ford dealer,or a very reputable transmission shop that has the tester for the solenoids. JExpedition07,what you're describing with bump shift coming to a stop is exactly what i had and a software update cured it. It's an easy thing for me to say cause i have a friend that is a tech at a ford dealer who told me about it. I believe it was a service bulletin for our vintage of expy's.

 

[Bain64]

I was just watching a. FordTechmakuloco video and he says you should have the transmission memory deleted on these trucks after a wheel bearing replacement to relearn the shift points.... my point is ANYTHING can throw off these transmissions lol.

How is this done? I just replaced both front bearings/hubs. Which FordTechMakuloco video was it? I don't remember him mentioning that on the bearings video, but maybe I missed it.

 

[bobmbx]

How is this done? I just replaced both front bearings/hubs. Which FordTechMakuloco video was it? I don't remember him mentioning that on the bearings video, but maybe I missed it.

Disconnect the negative battery cable. Install a jumper between the negative battery cable you just removed and the positive battery terminal. MAKE SURE THE NEGATIVE CABLE AND THE JUMPER DO NOT TOUCH GROUND!!! The jumper will ensure all the capacitors in the system will discharge, and this clears all the parameters in the engine and tranny control systems.

Wait about 15 mins, remove the jumper and re-install the negative cable, then perform the system calibration procedure. Do you know what that is?

 

[JExpedition07]

How is this done? I just replaced both front bearings/hubs. Which FordTechMakuloco video was it? I don't remember him mentioning that on the bearings video, but maybe I missed it.

It wasn't in the bearing video itself but in another one, I'll look for it.

 

[Jennifer Fradella]

Wrench and engine light came on last night for the first one since this post. Took it back to auto zone and it pulled the same P0741 code. Engine light stayed on both times I drove the truck today. Dropped it off at the transmission shop this evening and noticed the engine light had been off. Crazy. Hope this gets squared away soon so I can just drive by now, without worrying.


Jen

 

[Adieu]

Texas....it's not a hurricane flood truck is it???

I know these things are a bit harder to drown than your average econobox, but still.... once water gets in electronics can become intermittent haywire

PS if you don't plan to play with programming, just get a Bluetooth ELM327 knockoff.

Panlong is a solid brand, costs like 12 bucks on Amazon mine's been good to me for a couple years now, I always leave it plugged in.

Cheaper than wasting time and gas to autozone, and also those guys sometimes screw up and read weird shit.... elm327 has no problem with Ford codes and reads true

 

[Adieu]

They did use Mercon LV.

I did also bring it back to the same shop 500 miles later bec I did feel some kind of misfire after taking off (a handful of times) between 1250-1600 RPMs that had not happened prior to the transmission being serviced. (The green wrench appeared right after the 1st time I brought it to them...the very next day as I was driving on the interstate, in the pouring down rain, on top the spillway. But, idk if the light had ever appeared to the prior owner, or if it was just time for it to appear). Who knows.

At this time, they sucked the fluid back out and added a friction modifier, then refilled it with Mercon LV. It has not had that misfire feeling since.




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Not like they'd admit it if they screwed up.

By what they did, it sure SOUNDS like they screwed up and used the wrong kind....

Probably Merc V

 

[Adieu]

Disconnect the negative battery cable. Install a jumper between the negative battery cable you just removed and the positive battery terminal. MAKE SURE THE NEGATIVE CABLE AND THE JUMPER DO NOT TOUCH GROUND!!! The jumper will ensure all the capacitors in the system will discharge, and this clears all the parameters in the engine and tranny control systems.

Wait about 15 mins, remove the jumper and re-install the negative cable, then perform the system calibration procedure. Do you know what that is?

Hey do you know if that can reset an oil change interval countdown? My button broke and that flashing nonsense is annoying

 

[Jennifer Fradella]

Texas....it's not a hurricane flood truck is it???

I know these things are a bit harder to drown than your average econobox, but still.... once water gets in electronics can become intermittent haywire

PS if you don't plan to play with programming, just get a Bluetooth ELM327 knockoff.

Panlong is a solid brand, costs like 12 bucks on Amazon mine's been good to me for a couple years now, I always leave it plugged in.

Cheaper than wasting time and gas to autozone, and also those guys sometimes screw up and read weird shit.... elm327 has no problem with Ford codes and reads true

It came from Southwest Texas, real close to to the rio grande. I don’t think that’s where the hurricane was.


Jen

 

[Jennifer Fradella]

Hey do you know if that can reset an oil change interval countdown? My button broke and that flashing nonsense is annoying

No. How do you do that?


Jen

 

[Adieu]

No. How do you do that?


Jen

If you have any trip computer features its in there somewhere, otherwise some combo of long and short presses on the button by the odometer (which was already on its last legs and finally died on me)

 

[Jennifer Fradella]

I don't know if any of you are Catholics in here, but in case you are (or not, and really need a little more help and guidance with your truck), here are 2 Patron Saints of Mechanics that you can pray to for their intercession.

Saint Eligius of Noyon
https://catholicsaints.info/saint-eligius/

Saint Catherine of Alexandria
https://catholicsaints.info/saint-catherine-of-alexandria/

https://catholicsaints.info/patrons-of-mechanics/

My truck is in the transmission shop and I have been praying and asking Saint Catherine and Saint Eligius for their intercession for a decent diagnosis and honest mechanics.

 

[Jennifer Fradella]

OF COURSE ZERO CODES HAVE COME UP WHILE AT THE TRANSMISSION SHOP SO FAR. HE'S GOT HIS SCAN TOOL ON AND AND GOING FOR A RIDE ON THE INTERSTATE. NICE.

 

[Jennifer Fradella]

Code never came up one time today. He said transmission fluid looks clean and the correct color and has the right amount in it. If the wrench comes back on to bring it back so he can hook his scanner up while it’s on.


Jen

 

[Atman246]

Hey Jen, hope you are well. Your issue may have been resolved by the fluid change. Some time and driving needed to done in order for the fluid to do it's job. It sounds like the solenoid was sticking and flushing the fluid with new clean and proper fluid may have resolved the issue. There was an issue with the late 90's,early2000's crown vics and grand marquis where the transmission would shudder when the torque converter locked up. Fords first repair was to flush the fluid out and replace with new. The customer was then instructed to drive at least 5000 kms for the repair to be confirmed. I'd say about 90% of the vehicles were repaired with just that. Just as an afterthought,i know to the layperson,a flashing light on the dash can be nerve wracking. Rest assured that the p0741 is not detrimental to the operation of the transmission,and won't cause damage. It's a fluid pressure fed lock up mechanism inside the torque converter that's not locking up. Worst case scenario is you're not getting the best gas mileage that you could. Hope this helps a little and certainly hope that your issue is resolved. Take care.R.