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How does the torque converter solonoid and shift solonoid look like on a 1998 chevy k2500 4x4

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They are the electronic switches mounted to the transmission valve body. Usually under a pan or cover.

Posted on Oct 26, 2013


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Posted on Jan 02, 2017

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SOURCE: 1998 olds intrigue service engine light is on scanned as torque c

The whinning noise from my experance is caused from the filter starting to get pluged in trans. restriction the flow of trans. fluid, its more noticeable when its colder out and oil is thicker. might be a good time to service trans if you havent done it yet. I'am like you i don't know of any torque converter sensor, but if it showed up it must have one, or its something else that kicked that code out, or he read it wrong. I wouldent wory about it, its lasted this long chanses are it will last the life of the car. Did autozone erase the code? If they did When it comes on again have it scaned again and see if it shows the same code, its posible, that code could have been stored in the computer from another time the chk.engine light came on and you did not see it. It only has to come on for a split secound to store a code.

Posted on Feb 13, 2009

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SOURCE: torque converter and gearbox

Remove trans to replace T/Converter.

Posted on Jun 19, 2009

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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

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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: My 1993 chevy 3/4 ton

If your transmission is part electronic, its the tps throttle positioning sensor. if its a diesel it will be on the passenger side of the injector pump, if it's gas same side. if it gets loose or goes bad you will have these problems. and your speedometer problem is likely the speed sensor located at the back end of the transmission. very easy to replace. the tps on a diesel not so easy. good luck!

Posted on Jan 04, 2011

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Where is the torque converter solonoid and the shift solonoid located on a 1998 chevy k2500 4x4

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1998 jeep grand cherokee 4x4. have the p0740 code. have to start from neutral, then shifts faily well. May start fluttering and making noise, have to put back to N, then to D and once again will shift. ...

P0740 JEEP - Torque Converter Clutch Circuit
- Engine Light ON (or Service Engine Soon Warning Light)
- Transmission shift shock
- Vehicle may not shift into the highest gear

Possible causes
- Low transmission fluid level
- Dirty transmission fluid
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- Torque converter clutch solenoid valve harness or connectors
- Torque converter clutch solenoid valve circuit is open or shorted

When is the code detected?
Torque Converter Clutch (TCC) unlocked for 10 sec., ECM commands converter lock-up and did not record engine speed drop.

P0740 JEEP Description
The torque converter clutch solenoid valve is activated, with the gear in D4, by the Transmission Control Module (TCM) in response to signals sent from the vehicle speed and the Engine Control Module (ECM). Lock-up piston operation will then be controlled. When the torque converter clutch solenoid valve is activated, the torque converter lockup clutch will engage creating a 1 to 1 RPM ratio between the transmission input shaft and the rotational speed of the torque converter.

Lock-up operation, however, is prohibited when A/T fluid temperature is too low.

When the accelerator pedal is depressed (less than 2/8) in lock-up condition, the engine speed should not change abruptly. If there is a big jump in engine speed, there is no lock-up.

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The shift gate or the synchronizers can be worn. Also the clutch can need adjustment if possible.

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