Question about 2001 Dodge Ram 1500 Truck 2WD

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2000dodge ram 5.9 4wd torque converter locks in and out at 53 mph

Took it to trans shop and trans checked out with no code problems.
the mechanic said that there may be something that the dealer could do to download something into the computer but he wasnt positive
doesnt do it all all the time,very random
93,000 miles

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53 is pretty much normal,60 being max. when the converter locks your gas milage goes up. Don't knock it!

Posted on Jun 23, 2009

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1 Answer

P0741 torque converter BUT check engine light doesn't show anymore


First the transmission is about $3,600 twice what you were told

You take it to a trans shop they should use the proper test equipment & road test, to check out the codes & maybe just
a converter clutch solenoid is needed

If the trans fluid has never been changed every 3 years since
2003, then the trans may be done & have to be replaced

If the fluid is dark,smells or is burn't,don't change it, as that is not
a fix for anything & it will slip & be unusable.

If a trans shop doesn't take you on the road test or into the shop
to explain things or pitches a rebuilt trans, then try another shop
& go thru the routine a second time

In the end the trans may have to come out, but not from the codes
I see, until properly diagnosed (I used to own a trans shop hope
that helps)

Just keep in mind a fluid change (never a flush) won't remove
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Changing a failed or clogged solenoid & changing somewhat
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1999 silverado transmission


Since the transmission shifting and torque converter lock (cruise speeds) up are computer controlled you need to have a scanner hooked up that can read Transmission control module (TCM) fault codes. Also check for engine codes as this could be a misfire, but in that case the check engine light should be flashing while the engine is misfiring and set a fault code. If no codes of any kind are present in memory when the testing is done you almost certainly have a mechanical fault in the transmission like a malfunctioning torque converter clutch, but even that should set a fault code, so have the testing done.

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I have replaced both Shifting solenoids and Speed sensors but when I put my truck in gear it makes a slight **** and stalls out. It starts up and idles fine but won't go.


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2 Answers

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In most cases it will be torque converter shudder. The trans fluid is not lubricating properly and causes a less then optimum performance and the lock-up mechanism fails to shift fully. This causes the lock-up to shudder or modulate and gives symptoms of a unbalance wheel at 40-50 mph. Change the fluid and filter and your problems will go away. The fluid should be changed every 30,000 miles...most people don't ever change the fluid and wonder why their trans needs a $3000 fix. Hope it works for you...it did for me.

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1 Answer

Code po741 on a cadillac deville dhs 2001


P0741 Torque Converter Clutch Circuit Performance or Stuck Off

Your car actually has a viscous converter clutch inside the torque converter instead of a (mechanical) torque converter clutch to lock up the torque converter for fuel economy improvement. You will see it referred to as the VCC and/or TCC.....

The TCC/VCC has a variety of components in the system including an electrical circuit supplying the transmission, the apply solenoid inside the trans, the torque converter itself, the PCM that controls the apply, etc. It is impossible to diagnose from afar. Unlikely that it is a "sensor" inside the trans as the PCM controls the VCC apply and uses engine and trans data that it receives from a variety of sources. If a "sensor" had failed the trouble code for that sensor would be setting......

Something as simple as the brake switch can cause the VCC to not apply correctly. There is a safety switch on the brake pedal that activates the brake lights and disconnects the VCC circuit. If it is misadjusted then the trans cannot apply the VCC. Lots of other trouble shooting items on the VCC system. If you don't have a service manual and cannot trouble shoot the system, I would recommend a Cadillac dealer as they have the trouble shooting information for the specific VCC that the Cadillac 4T80E trans has that a trans shop is simply not familiar with. No sense working on the trans until you actually know what is wrong.

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Took my 1997 Dodge Ram to get emissions test, code PO740 came up. What does this mean?


well this code is for your lock up for torque converter it could be sensor in trans causing this but if you are able to do your Owen testing i can send you the test it little long so i would have to email it to you let me know

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4 Answers

P0740 code on 2000 Honda Odyssey


Code p0740 is a problem in lock up control solenoid assembly, Check whether scan tool indicates another code. Does the scan tool indicate another code? YES - Perform the Troubleshooting Flowchart for the indicated Code(s). Do not continue with this troubleshooting until the causes of any other DTCs have been corrected. Measure the line pressure. Is the line pressure within the service limit? Repair the hydraulic system as necessary. Replace the Lock-up Control Solenoid Assembly set lock-up control solenoid valve/shift control solenoid valve A assembly and the A/T clutch pressure control solenoid valve A/B assembly. Turn the ignition switch OFF, and reset the PCM memory by removing the BACK UP fuse in the passenger's under-dash fuse/relay box for more than 10 seconds . Using the scan tool, check to be sure that the engine coolant temperature is 176°F (80°C) or above . Drive the vehicle at 55 mph (88 km/h) for more than one minute . Recheck for code P0740. Does the OBD II scan tool indicate code P0740? YES - Remove the torque converter and inspect for a missing torque converter O-ring. If the O-ring is damaged or missing, replace the transmission and torque converter. NO - The system is OK at this time.

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1 Answer

2002 odyssy auto shift point


have you thought maybe it is finally working proper now! if torque converter wasn't locking up yes then I would say something wrong!

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1 Answer

1999 dodge ram truck automatic trans may be slipping, not sure??


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Nov 25, 2008 | 1999 Dodge Ram

1 Answer

Error codes


Her is the definition and a list of possiable causes.


Code P1740-Torque converter clutch did not lock up when the PCM sent the command. Enabling conditions: No engine or transmissions codes are present, vehicle speed was under 70 MPH, TPS was under 33% open. When the PCM commanded the torque converter to lock, no change was detected in engine speed. Blocking action: This code can block the following monitors: none.
Testing: Check torque converter solenoid for proper operation.
P1740 TCC O/D SOL PERFORMANCE (GAS)
Theory of Operation
The Torque Converter Clutch (TCC) Solenoid is used to engage the TCC which improves fuel economy.
When Monitored
The Torque Convertor Clutch (TCC) and Overdrive Clutch (OD) will be tested each time the PCM requests TCC engagement in 3rd gear and OD.
Set Condition
The DTC will set if the expected RPM drop is not achieved while attempting to engage TCC or OD. This indicates a malfunctioning torque convertor or overdrive clutch.
Possible Causes
* ENGINE DTCS PRESENT
* TRANSMISSION DTCS PRESENT
* TRANSMISSION TEMPERATURE TOO COLD
* OIL PAN CONTAINS EXCESSIVE DEBRIS
* 3-4 SHIFT SOLENOID
* SHAFT OR SEAL DAMAGE
* TCC SOLENOID
* TORQUE CONVERTER

Sep 25, 2008 | 2005 Dodge Ram 3500

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