Stopped shifting 1993 Chevy Lumina APV, yesterday it stopped shifting into the higher gears (drive and overdrive) the other gears seem to be fine (1st,2nd,reverse) there was never any slippage, just stopped working.
Happened to mine ,, Simple solution : Take it to transmission maintenance,, they clean up the mesh and fresh fluid,, will shift properly, will run like new.
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My APV locked in overdrive and would stall the engine at stops. This van was my daughters and they had junked it because of the cost of repair. I would test the tranny lock up by coasting up to a stop and if I sensed the tranny was locked I would floor the accelerator a couple of times with a quick back off each time. After a dozen or so of these procedures whatever was sticking thje lockup came free and the problem was mixed.
could be the VSS - vehicle speed sensor .
Speedometer and Odometer
The Vehicle Speed Sensor (VSS) is a gear driven permanent magnet generator. The vehicle transaxle houses the VSS. The VSS generates a sine wave output with a frequency proportional to the vehicle speed.
The Powertrain Control Module (PCM) converts the CKT 389 signal to an output that switches to ground at a frequency of 4000 pulses per mile. The CKT 389 signal drives the speedometer and the odometer. Various other vehicle components use the CKT 389 signal. Refer to Engine Controls.
If it won't go into overdrive a speed sensor within the transmission may not be sending the shift signal to the transmission. Check fluid levels to make sure that's not causing the problem. Also, check that the fluid is red color and clean.
Transmission probably needs to be serviced at a reputable shop if you want this problem fixed.
check your camshaft and crankshaft sensors. When defective, it may cause stalls, misfires, loss of power. Also have check the engine for vacuum leaks. Hopefully this helps!!
"93 chevy lumina, starts good and will run for a little bit and then shuts off. or when i put it into gear it will shut off also. i have replaced the spark plugs,has new filters and used an injector cleaner. i hope you can help me figure out what is wrong with it. thanks
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