07 5r110w help
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4wd High
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07 5r110w help
So 2 weeks ago i lost transmission on my truck found a clean used one did the transgo kit to it and installed test drove fine the first night the second night it wouldn’t go into overdrive and the light started flashing get home check codes and only thing is p1744 does anyone have any insight to this
Fleet Mechanic
Joined: Jan 2016
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So, you installed a good used one. Did you flush the transmission cooler before you installed the new to truck transmission? If there were any metal or other debris in the cooler or cooler lines chances are that the debris has now infected the valve body and will cause those solenoids to stick. Short of any wiring issue that's where I would be looking.
Drop the pan, pull the valve body and check for debris in the valves. Try to blow them out with air, flush the cooling system, reinstall valve body with new gaskets, and change the transmission filter again. Hopefully that takes care of your issues. If it does and in a few weeks the problem returns then do it all over again as you probably didn't get all the debris removed.
Make sure you are using the correct fluid. I use SP but others recommend LV.
Drop the pan, pull the valve body and check for debris in the valves. Try to blow them out with air, flush the cooling system, reinstall valve body with new gaskets, and change the transmission filter again. Hopefully that takes care of your issues. If it does and in a few weeks the problem returns then do it all over again as you probably didn't get all the debris removed.
Make sure you are using the correct fluid. I use SP but others recommend LV.
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4wd High
Joined: Aug 2021
Posts: 9
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So, you installed a good used one. Did you flush the transmission cooler before you installed the new to truck transmission? If there were any metal or other debris in the cooler or cooler lines chances are that the debris has now infected the valve body and will cause those solenoids to stick. Short of any wiring issue that's where I would be looking.
Drop the pan, pull the valve body and check for debris in the valves. Try to blow them out with air, flush the cooling system, reinstall valve body with new gaskets, and change the transmission filter again. Hopefully that takes care of your issues. If it does and in a few weeks the problem returns then do it all over again as you probably didn't get all the debris removed.
Make sure you are using the correct fluid. I use SP but others recommend LV.
Drop the pan, pull the valve body and check for debris in the valves. Try to blow them out with air, flush the cooling system, reinstall valve body with new gaskets, and change the transmission filter again. Hopefully that takes care of your issues. If it does and in a few weeks the problem returns then do it all over again as you probably didn't get all the debris removed.
Make sure you are using the correct fluid. I use SP but others recommend LV.
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4wd High
Joined: Aug 2021
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ok so some say it’s electronic issue some say it’s the converter that’s why I’m on here seeing if anyone else experienced an issue like this
FTE Leadership Emeritus
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From: Stephensville WI
By the way, I used the Valvoline Max Life fluid in my old 07 5R110W, it mixed fine with the Mercon SP left in the TC and did not cause any issues. Ran that for about 30k before the truck was traded.
FTE Leadership Emeritus
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From: Stephensville WI
Well, they are both correct. The computer commands the TC lockup.
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P1744 Torque converter slippage during torque converter command. Basically the tcm is detecting a slip and throws this code because it doesn't understand why it's slipping. You will need some diagnostic tools to look at parameters when diagnosing. But, it goes back to either the solenoid has failed mechanically or the valve is stuck (mechanically) or it could be a hydraulic pressure problem. It could be torque converter clutches slipping. Is the transmission still under a warranty from the seller? You may need to take it back and get another one.
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4wd High
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P1744 Torque converter slippage during torque converter command. Basically the tcm is detecting a slip and throws this code because it doesn't understand why it's slipping. You will need some diagnostic tools to look at parameters when diagnosing. But, it goes back to either the solenoid has failed mechanically or the valve is stuck (mechanically) or it could be a hydraulic pressure problem. It could be torque converter clutches slipping. Is the transmission still under a warranty from the seller? You may need to take it back and get another one.
Frmr Ford Trans Engr
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From: SE Florida
It is not an electrical issue. If it was, you'd have a code for an electrical fault.
I believe it could be a stuck torque converter clutch control valve, a bad seal on the input shaft, or a bad torque converter. The valve is in the pump body, not the valve body.
You need to monitor TC_SLIPACT (torque converter clutch slip,) TC_SLIPDSD (torque converter desired slip,) and TCC (PWM percentage.) These will tell the story of what the clutch is doing. You may need to clear the codes to get it to try to lock again.
I believe it could be a stuck torque converter clutch control valve, a bad seal on the input shaft, or a bad torque converter. The valve is in the pump body, not the valve body.
You need to monitor TC_SLIPACT (torque converter clutch slip,) TC_SLIPDSD (torque converter desired slip,) and TCC (PWM percentage.) These will tell the story of what the clutch is doing. You may need to clear the codes to get it to try to lock again.
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4wd High
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It is not an electrical issue. If it was, you'd have a code for an electrical fault.
I believe it could be a stuck torque converter clutch control valve, a bad seal on the input shaft, or a bad torque converter. The valve is in the pump body, not the valve body.
You need to monitor TC_SLIPACT (torque converter clutch slip,) TC_SLIPDSD (torque converter desired slip,) and TCC (PWM percentage.) These will tell the story of what the clutch is doing. You may need to clear the codes to get it to try to lock again.
I believe it could be a stuck torque converter clutch control valve, a bad seal on the input shaft, or a bad torque converter. The valve is in the pump body, not the valve body.
You need to monitor TC_SLIPACT (torque converter clutch slip,) TC_SLIPDSD (torque converter desired slip,) and TCC (PWM percentage.) These will tell the story of what the clutch is doing. You may need to clear the codes to get it to try to lock again.
also that transmission can with a torque converter but when spinning it it goes 1/4 way rev and thumps/bumps the old Original converter when spun was smooth is it supposed to be that? I know engines not transmissions.
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Fleet Mechanic
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It should be smooth and no resistance. If you are having tight spots when the converter is spun in the front pump then there most likely is damage to the pump or debris interfering with its operation. You said you bought the transmission used, it's possible that it wasn't any good when you purchased it or it was damaged when removed. I've seen parts pullers drop the trans and leave the converter attached to flywheel. That normally damages the front pump. In the case of these transmissions the torque converter nuts are a major pain to get to and remove and it would be likely someone would do just that, remove it with converter still on flywheel.
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