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Do I need a transmission modulator valve if my Chevy Cavalier's transmission shifts a little rough?

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Posted on Jan 02, 2017

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SOURCE: rough idle on 1999 chevy cavalier z24

Check for vacuum leaks. Spray some carb cleaner or WD40 around the intake manifold, trottle body and any vacuum lines. Check for loose connections on engine wiring harness (Maybe you disconnected a sensor, and forgot to re-attach it?).

Posted on Aug 20, 2009

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  • 125 Answers

SOURCE: how replace a transmission modulator valve on

It is located on the transmission with a vaccume line going to it. There is a clamp with a bolt that holds it to the transmission. It is an easy fix.

Posted on Oct 10, 2009

  • 2 Answers

SOURCE: 1997 Chevy 1500 P/U 4x4 small V8. Transmission shifting issue.

you may be confusing the torque converter clutch engagement with o.d. this trans has a problem with the T.C.C. regulator valve wearing out the valve body bore. this will cause the converter clutch to engage only sometimes or not at all. this will set a P1870 code in the control module. when this code is stored in the controller, ( check engine light may or may not be on), it increases the pressure in the transmission causing the 1-2 shift to be harsh. ask a local tranny shop to scan the vehicle ( most will do this for free) if this is the problem they can either fix your valve body (sonnax parts) or replace it with an upgraded valve body. hope this helps

Posted on Dec 16, 2009

  • 37 Answers

SOURCE: 1995 Chevy S10. The transmission (4L60E) has been

Imput drum is built incorrectly or bad imput drum. trans assembled correctly, put on trans x and if trans does not operate correctly I will ship you one for $1000 www.TransmissionGarage.com

Posted on Dec 30, 2009

  • 2427 Answers

SOURCE: 98 chevy cavalier with shifting problems

check the transmission solonoid..

you will need to get a diagnostic done to find out if thats the problem.. most likely its that,, or the transmission belt that needs changing.. in eighter case you will need someone with diagnostic machine to scan the cars computer for that!!

Posted on Mar 09, 2010

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1 Answer

Where is the transmission control solenoid located on a 2005 chevy cavalier 2.2l


Hi Ashley Farmer , my name is Jeff Armer . Which solenoid , your Cavalier has four , Pressure control solenoid , TCC - torque converter clutch solenoid , 1-2 shift solenoid and 2-3 shift control solenoid . And all are located inside the transmission . Do you have a DTC - diagnostic trouble code stored in the PCM - powertrain control module ?

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2004 cavalier transmission rough shift


That intermittent rough shift would be caused by the computer.Disconnect the ground post from battery for a couple of days so the computer will reset back to OEM specs when recharged after the battery is re-connected.Computers just need time to "forget"what they were doing and will reset.

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97 cavalier starts and runs ok from a cold start after a few minutes of warm up it starts to run rough and miss. If i try to drive it it will start out ok but won't shift automaticly but shifts fine m


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1 Answer

1999 chevy cavalier transmission won't shift into


1999 cavelier manual trans: My son was shifting his manual trans really rough (ramming through the gears to try to beat someone out at a light) and ended up not being able to put it into anything but 3 and 4 (straight up and down). We noticed that the shifter cable, that actuates the position of the arm on the transmission, had pulled away from a "c" clip and was not held into place about 8-10 inches down the cable away from the trans. The cable needs to be secured into that clip in order to let the wire inside move the trans. lever to shift. Otherwise you will be stuck on what ever "rail" your trans is on at the time of disconnection. It would be the first thing that I would check.

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1 Answer

I need to change the transmission modulator valve on a 2003 Chevy Impala. I need help with the location of the valve and even steps on how to change it. Thanks


Hello, the 2003 impala's dont have a transmission modulator valve. this transmission is electronic controlled by the power train control module. the transmission uses a pressure control sol. inside the transmission instead of a vac. operated modulator valve. if you are having a late harsh shifting problem, this would be more in the area of a pressure control sol. at fault

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Reduced engine power came on i'n my 00 chevy


Ok I would start by checking your shifter to make sure it adjusted right and you can do this by looking at your shift indicator if that is ok then might have a bad manual shift valve thats in the transmission, if that valve goes bad it would tell the pcm that your transmission is being shifted into another gear while your driving causing the Power control module (PCM) to out you vehicle into reduced engine mode

May 23, 2011 | 1999 Chevrolet K1500

2 Answers

1997 Chevy 1500 P/U 4x4 small V8. Transmission shifting issue.


you may be confusing the torque converter clutch engagement with o.d. this trans has a problem with the T.C.C. regulator valve wearing out the valve body bore. this will cause the converter clutch to engage only sometimes or not at all. this will set a P1870 code in the control module. when this code is stored in the controller, ( check engine light may or may not be on), it increases the pressure in the transmission causing the 1-2 shift to be harsh. ask a local tranny shop to scan the vehicle ( most will do this for free) if this is the problem they can either fix your valve body (sonnax parts) or replace it with an upgraded valve body. hope this helps

Nov 25, 2009 | 1997 Chevrolet K1500

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