Nick1234 Posted March 24, 2005 Report Share Posted March 24, 2005 93 lumina with 94 4t60-E. Car is not going into torque converter lock up, or overdrive, which ever it is when im in the highest gear on the freeway. computer was scanned, and nothing came up. I checked the transaxle plug in the front and all the wires seem to be fine, nothing is loose. what do i do now? what about the vacuum modulator under it? could it be a solenoid, and if so wouldn't it have shown up when the computer was scanned? Quote Link to comment Share on other sites More sharing options...
JoroCorona Posted March 24, 2005 Report Share Posted March 24, 2005 4T60E should have no vacuum modulator. Its an electronicly controlled trans. Sounds like someone dicked you over and put a 4T60 in it instead of a 4T60E. Quote Link to comment Share on other sites More sharing options...
Brian P Posted March 24, 2005 Report Share Posted March 24, 2005 4T60E's have a vacuum modulator. They don't have the TV cable however. As to your question, the TCC solenoid could have failed. It would involve opening up the side pan. With the trans inside the car it's pretty involved, but not impossible. If you have access to a scanner with live readout, see if the ECM is giving the "on" signal to the solenoid while driving +50mph. Quote Link to comment Share on other sites More sharing options...
1990lumina Posted March 24, 2005 Report Share Posted March 24, 2005 I know my torque converter won't lock until the car is fully warmed up to correct temp...maybe your car just ins't warm enough yet... But it sounds like the TCC soleniod..I know it was a Service Bulletin about it on alldata.com - Jeff L. Quote Link to comment Share on other sites More sharing options...
3pt1lumina Posted March 24, 2005 Report Share Posted March 24, 2005 I know my torque converter won't lock until the car is fully warmed up to correct temp...maybe your car just ins't warm enough yet...But it sounds like the TCC soleniod..I know it was a Service Bulletin about it on alldata.com Unless my Lumina is up to operating temperature, it will not shift into overdrive and the torque converter will not lock up. I thought this was an issue until I bought my 01 Malibu and it won't shift into 4th until it reaches a certain temperature. Quote Link to comment Share on other sites More sharing options...
1990lumina Posted March 25, 2005 Report Share Posted March 25, 2005 I too thought mine wasn't working proper until it hit me that it would work at a certain temp..then I read somewhere on this site that that was how it worked.... - Jeff L. Quote Link to comment Share on other sites More sharing options...
Nick1234 Posted March 25, 2005 Author Report Share Posted March 25, 2005 well i can drive to the car for 2 hours and it still won't shift, so i think it woudl be hot enough. I got some info on how to check the tcc solenoid. Should i just rule out the vacuum modulator below the transaxle connector? i will look for either a bad solenoid or a shitty wire. This sucks. Im not even done paying for this tranny and it already doesn't work right. I knew it worked right before the accident though. damn it Quote Link to comment Share on other sites More sharing options...
GutlessSupreme Posted March 25, 2005 Report Share Posted March 25, 2005 :withstupid: x2 My tranny won't shift into OD until I've beend driving a good 20 minutes. But that doesn't sound like your problem... Quote Link to comment Share on other sites More sharing options...
Canada Posted March 25, 2005 Report Share Posted March 25, 2005 Won't shift into 4th gear? Not to sound like a dick, but you guys don't even know enough to know that you don't know enough. Hell, I barely have a grasp on automatic transmissions, and I've rebuilt a couple. For starters, the 4T60-E is eletronic, but only the shift solenoids are. Line pressure is still raised via vacuum. It wasn't until the 4T65-E that the line pressure became eletronically controlled. Now, for Nicks actual problem. It sounds like you are having issues with your TCC (Torque Converter Clutch).....it simply locks both halves of the torque converter together to drop the engine rpm a bit to get a slightly better fuel economy. When it comes on, it causes the engine to drop a few hundred rpm. What some people consider a 4th gear because the the actual shifts of the transmission are so Grandma friendly, they lost count. Now, to make sure it is shifting into 4th gear......drive down the highway in 3 (I forget how the gear selector is marked, for now I'm saying its PRN4321.), then tap it into 4th (causing a 3-4 shift). You should see the tach drop for the shift. To test your TCC.....drive down the highway in 4, with your right foot still on the gas, lightly press the brake pedal with your left foot. You should see the tach rise (TCC releasing) as the brake lights come on. Now for the TCC to come on, the ECT/TFT does have to be to a certain point, I think you guys are mistaking TCC apply for a 3-4 shift. Because no where in the programing of the PCM is there anything about not letting the trans go to 4th until its warmed up....at least if everything is operating properly. Quote Link to comment Share on other sites More sharing options...
Nick1234 Posted March 25, 2005 Author Report Share Posted March 25, 2005 yester i acutally did try that, the guy that put my tranny in drove it, and when we went down the road he had it in 4, and he hit the brake and the rpms didn't move at all. they just held. so does this mean that tcc solenoid is bad? Quote Link to comment Share on other sites More sharing options...
Nick1234 Posted March 26, 2005 Author Report Share Posted March 26, 2005 and should i replace the vacuum modulator. you would think it has affect on it. Cause tonight i was thinking about this again and i wasn't going that fast when i was in the accident, maybe 30? and i knew everything was fine right up to the accident cause i was on the freeway. so the torque converter wouldn't have been locked up. also my cruise control doesn't work...... Quote Link to comment Share on other sites More sharing options...
manitcor Posted March 26, 2005 Report Share Posted March 26, 2005 itsdef a mechanical issue guys, as canada said there is nothing in the PCM to control that, however I have found on a "beat up" tranny that easing off the gas a tiny bit will allow it to lock into "4th" gear. My only guess as to why this happens is the right amount of change in vac pressue allows the messed up TCC to lock up as it should. Quote Link to comment Share on other sites More sharing options...
Nick1234 Posted March 26, 2005 Author Report Share Posted March 26, 2005 itsdef a mechanical issue guys, as canada said there is nothing in the PCM to control that, however I have found on a "beat up" tranny that easing off the gas a tiny bit will allow it to lock into "4th" gear. My only guess as to why this happens is the right amount of change in vac pressue allows the messed up TCC to lock up as it should. so what your saying is that, it is vacuum related? Quote Link to comment Share on other sites More sharing options...
Nick1234 Posted March 30, 2005 Author Report Share Posted March 30, 2005 GOD DAMN IT i am getting no where. i hate this damn thing so much. im driving to iowa tomorrow regardless if the piece of shit goes into tcc-lockup or not. we will see how she does. AAANNNDDD my cruise control doesn't work. i have checked countless vacuum hoses and still nothing. Quote Link to comment Share on other sites More sharing options...
Canada Posted March 30, 2005 Report Share Posted March 30, 2005 Well, if the rpms aren't rising when you tap the brakes while holding light throttle.....you then have a TCC problem. Be it mechanical, hydralic, or eletrical. Drive as far as you want......its only for fuel economy. Quote Link to comment Share on other sites More sharing options...
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