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Where is the torque convertor lockup solenoid located?

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1 Answer

Why lockup kicking in and out at low speed and lower gears

you could have a lock solenoid problem or torque convertor problem.

Aug 03, 2015 | 2005 Dodge Dakota

1 Answer

98 jeep codes p0743,p0740

Go here - - and find the AW-4 Service and Diagnostic Manual. Looks like you need to test some solenoids.

P0740 (M)Torq Con Clutch, No RPM Drop at Lockup. Relationship between engineicon1.png and vehicleicon1.png speeds indicated failure of torqueicon1.png convertor clutch lock-up system (TCC/PTU solenoid)
P0743 (M)Torque Converter Clutch Solenoid/ Trans Relay Circuits. An open or shorted condition detected in the torque convertor clutch (part throttle unlock) solenoid control circuit. Shift solenoid C electrical fault - Asin transmissionicon1.png
P0743 (M)Torque Converter Clutch Solenoid/ Trans Relay Circuits. An open or shorted condition detected in the torque convertor part throttle unlock solenoid control circuit (3 or 4-speedicon1.png autoicon1.png. trans. only).__________________
Rather than banning scary looking black semi-automatic sporting firearms, why don't we
identify and treat the nut jobs pulling the triggers, and put the criminals in jail ?

Feb 11, 2013 | 1996 Plymouth Voyager

2 Answers

Isuzu bighorn year 1995, not changing gear after 1st gear

This is the classic symptom of a vehicle with a failed torque converter lockup solenoid.
The lockup solenoid "locks up" the transmission to the drivetrain but only operates when the transmission progresses from first gear to second gear.

Dec 04, 2011 | Cars & Trucks

1 Answer

Come to a stop and it dies, starts back up but when you put it in gear it dies, have to let sit for awhile before it will go.starts up fine just wont go.

The problem is the torque convertor lock up. There is a solenoid in the transmission that applies the lockup. you can change this or a cheaper bandaid is to disconnect the wire connector at the front of the transmission. This will defeat the lockup mechanism. It is like stopping a car with a manual transmission without pushing the clutch pedal down.

Feb 11, 2011 | 1989 Pontiac Grand Am

1 Answer

2000 tahoe4x4 350 converter lock and unlocks all the time,trans rebuilt does same thing??? replaced tps sensor, no fault lights runs perfect other wise

The lockup converter is controlled by a lockup solenoid. This is a must to get fixed. If you let it go it will burn up the torque convertor. When it's not is lockup it builds up a lot of heat. You may be able to take it back to the shop that did the work and tell them it still does it... if they aren't willing or if you did it yourself I would replace the lockup solenoid first. If you take off the oil pan there is a solenoid, it will have two wires going to it, located on the valve body. It will plug into a connector that goes through the case itself. Try this first. Try to catch the fluid in a clean drain pan, then you can re-use it. Just filter it through a fine paint strainer first. Most auto parts stores, that sell automotive paint, will give them to you for free. Don't tighten the bolts up too much on the pan, an oil soaked cork gasket tends to split VERY easy. Good luck. If you have any problems get back to me.

Nov 12, 2009 | 1999 Chevrolet Tahoe

1 Answer

1994 mazda cronos 2.00 v6 auto car idles ok drives ok but when i come to a stop it stalls in gear been atuo

This sounds like a problem with the torque converter lockup system. Usually the torque converter lockup solenoid is at fault in your condition. This solenoid usually locks up the torque convertor (which acts like a clutch in an automatic transmission) when you are driving at a certain speed, and unlocks it when you press the brake, and/or come to a stop. When a torque converter stays locked up, and you stop the vehicle, it acts like a vehicle with a manual transmission, if you bring the vehicle to a complete stop without applying the clutch pedal, the brakes stall the engine. Basically, if the torque converter can't unlock, even when you come to a stop, the engine is still locked to the transmission, and even when you apply the brakes, the torque converter doesn't slip and freewheel like it should, but instead stalls the engine.

May 07, 2009 | 1994 Mazda 626

1 Answer

Transmission light cod P0740

PO740 is a TCC/lockup code.TCC stands for Torque Convertor Clutch.In between the engine and transmission is a torque convertor.Inside the torque convertor is a clutch.This clutch engages to eliminate slippage inside the torque convertor.When a malfunction occurs in the system,which is activated by solenoids,and a computer,a TCC code will set.There is a diagnostic route specifically for that code,to determine if the malfunction is electrical,mechanical,or hydraulic.

Sep 05, 2008 | 2000 Dodge Caravan

1 Answer

Transmission shifts hard

Your car has the 125c/3T40 model trans,3 speed automatic with lockup.When you say you unplugged the "speedometer",if you are referring to a square electrical connector on the trans,facing the radiator,that connector is not the speedometer,but the lockup circuit inside the transmission.It is likely the lockup solenoid inside the side pan has gone bad and is malfunctioning.It is a common problem on those transmissions.You will lose some gas mileage by unhooking the connector,and eventually,years down the road,will hurt the trans from the fluid running too hot.Lockup clutch application in a General Motors lockup torque convertor helps to cool the fluid.

Sep 02, 2008 | 1990 Buick Skylark

1 Answer

Transmission Lock Solenoid

i'm assuming your meaning the torque convertor lock solenoid... for that you'd have to seperate the motor from tranny and locate it on your stock toque convertor... or may need the whole convertor..

Jun 24, 2008 | 1994 Mazda Protege

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