supreme_style21 Posted November 13, 2003 Report Share Posted November 13, 2003 Today.. on my way to work, the transmission wouldn't shift above 1st. gear. At the next light, it would shift just fine.. next light, I'd be running 5-6000 RPM and it wouldn't shift. At one point, I lost everything and had to coast into a parking lot. I threw it into park, then drive, and it worked fine. No problems on my way home after work. And no, I didn't have it in 1st. gear. It was in drive the whole time. Whats wrong with 'er? Quote Link to comment Share on other sites More sharing options...
Robby1870 Posted November 13, 2003 Report Share Posted November 13, 2003 this is the 94, Im guessing? When did you change your tranny fluid last? Quote Link to comment Share on other sites More sharing options...
supreme_style21 Posted November 13, 2003 Author Report Share Posted November 13, 2003 this is the 94, Im guessing? When did you change your tranny fluid last? Yeah .. sorry :oops: '94 GP.. 3100 Trans fluid is full and clean. Fluid and filter were changed around 50,000 miles. Car now has 82,000. Quote Link to comment Share on other sites More sharing options...
Robby1870 Posted November 13, 2003 Report Share Posted November 13, 2003 Hmm.....its not making any noises like grinding or anything? It could be a shift solenoid.......... Quote Link to comment Share on other sites More sharing options...
supreme_style21 Posted November 13, 2003 Author Report Share Posted November 13, 2003 No noises that I could hear.. but I did have the radio cranked hardcore. Once it would shift, it shifted pretty damn hard. I just took it out and pounded around on the road, and it worked perfect... so maybe it was just a freak thing. Quote Link to comment Share on other sites More sharing options...
gmrulz4u Posted November 13, 2003 Report Share Posted November 13, 2003 Without a doubt it sounds like a problem with the Vacuum Modulator. Whether it's the Modulator itself or it's vacuum hose/supply. The 2 most common symptoms of Modulator problems are exactly what you indicate: 1) Transmission is very reluctant to shift out of 1st gear 2) Upshifts are extremely harsh, especially the 1-2 upshift That's my only guess! Quote Link to comment Share on other sites More sharing options...
supreme_style21 Posted November 13, 2003 Author Report Share Posted November 13, 2003 Thats what I immediatly thought.. but then I thought they got rid of the vacuum controlled trannys by '94? Quote Link to comment Share on other sites More sharing options...
gmrulz4u Posted November 13, 2003 Report Share Posted November 13, 2003 Nope...look under your hood, you will still have a Modulator...it still controls Main Line Pressure, the ECM just controls the shift solenoids... Quote Link to comment Share on other sites More sharing options...
Bizzo Posted November 16, 2003 Report Share Posted November 16, 2003 Where would this modulator be located on a '92 Lumina Euro and what does it look like? Quote Link to comment Share on other sites More sharing options...
Robby1870 Posted November 16, 2003 Report Share Posted November 16, 2003 Where would this modulator be located on a '92 Lumina Euro and what does it look like? It will be located on the front of the tranny, basically under the airbox, about 4-6 inches away from the end of the block. Its a big grey can looking thing (more than likely it will be covered in grease, but if clean it, its grey), with one vacuum line running to it Quote Link to comment Share on other sites More sharing options...
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