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My 1997 Mercury Grand Marquis transmission location of the torque converter lock up sensor

The tray will not shift into overdrive, suspect The Torque converter lock up sensor.

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There is no part called the lockup sensor, the lock up occurs when the Vehicle speed sensor sends a signal to the Transmission control module that the truck has reached the minimum speed and throttle angle for lock up to take place, it then activates a switch inside the transmission that locks up the torque converter clutch.

Posted on Nov 02, 2012

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Posted on Jan 02, 2017

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SOURCE: 2002 Dodge 2500 diesel auto

could be a bad lockup solenoid or a bad torque converter

Posted on Aug 28, 2008

  • 31 Answers

SOURCE: Transmission will not up shift.

check throttel valve cable it shoul be with adjusted to 1/32 in eather direction of the throttel stud

Posted on Dec 12, 2008

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SOURCE: can my torque converter sensor cause my transmission not to shift

I think it can and I remember problems with the PCM in the transmission controls had recalls. First check your fluid levels and see if it is low. You may get lucky to just add fluid. You may be better off running your VIN# to see if there were recalls on your car at the dealer. Best of Luck.

Posted on Jul 21, 2009

  • 1374 Answers

SOURCE: grand prix torque converter locks up too soon

Either the speed sensor, TCC solenoid , ECU or a stuck check ball in a lockup plate. I recommend taking this to a transmission shop this could get fustrating.

Posted on Apr 05, 2010

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SOURCE: Volkswagen 01M torque converter stuck

You have to be very careful with input shaft rings. They like to eat into the pump stater. Also always buy new vb don't buy rebuilt because they only work 2 out of 5 times. I know this for experience

Posted on Jun 06, 2010

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The Transmission shifts very hard after the first shift. Check engine light is on as well as the Green overdrive light blinks off and on. Speed sensor was cleaned and even replaced.


Your on the right track. Have you scanned the PCM, what codes did you get? If not and you changed the vehicle speed sensor,(VSS) did you check the (OSS) output shaft speed sensor, it will cause torque converter lock up and hard shifting and that pesky OD light flashing. I have also found that clutch packs inside auto tranny's dry out. Ford and some aftermarket companies sell a fluid that will recondition the clutch packs.

Mar 10, 2015 | 1997 Ford Thunderbird LX

1 Answer

1998 Mercury Sable: I changed the transmission seal and now when it shifts the light starts blinking overdrive. Could it be that a clip or sensor is not hooked up because it shifted great before and the...


Which seal was replaced? The torque converter (or main seal). Or one of the axle seals? Or another seal somewhere else? Usually the O/D light flashes when you have a TCC solenoid or shift solenoid problem. Like... if there's no power going to the torque converter lock-up solenoid, It will not go into fourth gear because the tcc solenoid cannot lock up the torque converter properly. Depending on which seal you've replaced, it may just be a coincidence. Maybe the light would have done this regardless. Either that or maybe something is not connected tightly. Maybe one of the transmission connectors.
I had the same light flashing in mine when I disconnected the valve body wiring connector because my torque converter was locked up solid and that was the only way I could move the car into the garage.
I would take a good look at the transmission connectors and make sure that all the connectors are tight.
I hope this helps, good luck!

Aug 30, 2013 | 1998 Mercury Sable

1 Answer

My 2001 grand marquis hestitates and shutters slighty when downshifting from 4th to 3rd gear, shutting off overdrive eliminates problem


The first thing to do here is to have the transmission fluid changed, the shudder is torque converter clutch chatter, just like a burned clutch in a manual transmission car. The new fluid renews the anti friction additives and in most cases eleiminates the problem, have the transmission flushed so all fluid is replaced.

Jun 06, 2012 | 2001 Mercury Grand Marquis

1 Answer

Starts & run when put in gear shuts off, will restart 3.8eng will not move as though the trans is locked


There is a good chance that your torque converter is locked due to a torque converter lock-up solenoid malfunction. (pretty common) The torque converter lock-up solenoid is what locks the torque converter to put the transmission into overdrive. When they malfunction, it will cause the transmission to be stuck in overdrive at all times (this is not supposed to happen until the vehicle speed gets over 45 Mph). You must remove the side cover from your transmission to replace the torque converter lock-up solenoid.
Please also be advised that many of the solenoid malfunctions - especially on older, high mileage vehicles, are caused by dirt and debris in the transmission. This debris is usually caused by wear or breakage of internal parts (like clutches or bearings) in the transmission. I would recommend also pulling the lower pan and filter off to see what kind of debris is in the pan and evaluate whether this may be caused by a more serious problem.

Nov 07, 2011 | 1997 Dodge Grand Caravan

1 Answer

Put 1 quart of dextron III/mercon in a transmission that calls for mercon v what should i do.its a 1997 mercury grand marquis


1 quart probably won`t have much of a affect on the transmission as there is about 10-12 quarts in the transmission to start with.the only way to fix it is to do a transmission service and change all the fluid and the fluid in the torque converter it has a drain plug that you will have to find so you can drain it.

Jul 06, 2011 | 1997 Mercury Grand Marquis

2 Answers

1997 grand cherokee orvis 44r3 tranny, no 4th gear up shift, pressure overdrive piston is 65 psi, would the overdrive solenoid partially stuck open would cause loss of pressure? Air pressured overdrive...


They had a lot of problems with the pressure sensors. I would replace the whole tail shaft because they had problems with them. You don't have to remove the trans to remove the shaft. Get one from the junk yard. Hope this helps leave comment.

Feb 12, 2011 | Jeep Grand Cherokee Cars & Trucks

1 Answer

Service engine code for t1744 2001 mercury sable


P1744 is a torque convert clutch circuit failure code which appears after the PCM tries to lock up the torque converter and fails on 10 consecutive attempts. You will probably need to replace the "valve body" on the transmission or have a solenoid replaced for your overdrive in your transmission to function properly and for the code to stop being set. I would ONLY recommend taking the vehicle to a transmission shop if you have driveability problems that continue to make the transmission not work normally and you can tell it's not shifting right.

Aug 07, 2010 | 1998 Mercury Sable

1 Answer

Rumbling in the transmission


If this is a feeling like going over rumble strips then it is coming from the lock up torque converter. Usually having the fluid completely flushed and an additive such as shudderguard added will take care of the problem within 250 miles (usually sooner).Otherwise the torque converter will need to be replaced.

Mar 01, 2010 | 2001 Mercury Grand Marquis

1 Answer

Jeep erradic in shifting


I would look into replacing the VSS which is the vehicle speed sensor, it is the input that tells the transmission when to go into overdrive and the torque converter to lock up, also make sure the connector is clean and tight to the sensor, this part is located on the side of the trans where the speedo cable would go.

Nov 07, 2008 | 1996 Jeep Grand Cherokee

1 Answer

Overdrive transmission


you have an issue with the torque converter clutch, your symptoms indicate this is the issue, possible TCC solenoid problem or the torque converter itself has a shorted magnetic clutch.

Jul 11, 2008 | 1992 Mercury Grand Marquis

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