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www.cargurus.com > Questions > GMC > Sierra 1500 CarGurusJan 17, 2011 - 1994 GMC 4l60e transmission shifting problems - I've got a 1994 GMC Sierra 4X4 5.7 I ... If you put it in low and lift the handle, it will go into second .... Justchange 1-2 - 3-4 solenoids first and if that doesn't work change the ...
www.2carpros.com/articles/automatic-transmission-problems Jul 15, 2015 - Rescan the PCM for trouble codes, if none appear the problem could ...Excessively low transmission fluid (Note: If transmission is operated for an .... it waslow, and now my car will only shift from 1st to 2nd manually and will ...
Shift - interlock system problem .
Automatic Transmission Shift Lock Control System
The automatic transmission shift lock control system is a safety device that prevents an inadvertent shift out of PARK when the engine is running. The driver must press the brake pedal before moving the shift lever out of PARK position. The system consists of the following components:
• The automatic transmission shift lock control solenoid
• The automatic transmission park lock solenoid
• The automatic transmission shift lock control switch
• The transmission range switch
With the ignition in the ON position, battery voltage is supplied to the automatic transmission shift lock control switch. The circuit continues through the normally-closed switch to the automatic transmission shift lock control solenoid. The transmission range switch provides a path to ground for the automatic transmission shift lock control solenoid in the PARK position. With the automatic transmission shift lock control solenoid energized the shift lever is mechanically locked in the PARK position. When the driver presses the brake pedal, the contacts in the automatic transmission shift lock control switch open, de-energizing the automatic transmission shift lock control solenoid. This allows the shift lever to move from the PARK position. When the shift lever is out of the PARK position the controlled ground contacts in the transmission range switch open. This prevents the automatic transmission shift lock solenoid from energizing when the vehicle is out of the PARK position.
Have you tried shifting the automatic transmission to neutral, or if manual transmission- place shift lever to neutral position, then shift the transfer case to neutral position wait a couple seconds then try shifting to 4 low- if you have manual hubs, engage those last. This removes most of the potential mechanical resistance that should allow for the transfer case to shift.
If it still will not go into 4 low you may be dealing with damaged teeth, bent shift dog or worn internal bearings inside the transfer case. As I recall, that was NOT a shift on the fly transfer case.
Assuming the pickup is an automatic, check the transmission fluid. The #1 cause for transmission slippage is lack of Automatic Transmission Fluid.
If the pickup is a standard shift, the pin that connects the shift to the transmission has likely broken. You would still be able to shift from the inside but the gears won't engage. A bad clutch is also a possibility but you would have noticed a burning smell prior to the clutch giving out.
Hi, if it is an automatic transmission, it could be several things:
It could be really low on transmission fluid or the fluid may have leaked out. Do you see an reddish or reddish-brown fluid under the car? Check the fluid level by looking at the transmission fluid dipstick.
The torque converter (essentially a motion transfer device that resembles two fans facing each other) may be bad. As the engine spins, up, the fluid in the torque converter starts spinning and flowing and starts to 'spin' the blade on the transmissin side (it's called locking up the torqure converter). If there a malfunction in the converter, or no fluid, as noted above, no motion to the transmission.
Is the emergency brake stuck on?
Another issue might be the transmission linkage - when you move the shift handle to "D", there is a linkage that moves a lever on the transmission to change how fluid moves thru the transmission, etc. Check for a broken linkage between the bottom of the shift handle and the tranny. This is best done at a good auto repair shop or dealer.
If this is a manual transmission car, you probably have a worn out clutch plate or broken shift linkage. See a mechanic.
Manually shift thru all gears up & down the scale. Try adding Motorcraft Additive Friction Modifier, available from Ford parts dept. This REALLY STINKS!!! Don't get any on you. Pour into trans fluid. Drive a few miles shifting manually thruthe gears, then do a normal start stop drive several times. This will luburcate trans, normally used for differential but has worked in automatic transmissions of all makes for years. Otherwise mechanical problem for transmission repair facility.