Good luck they all do this and I haven’t seen anyone figure it out yet. People have rebuilt the transmission and it still does it so I say drive it until it dies
Check the fuse block for a blown fuse. There may be a solenoid inside the transmission that finally gave up. Look for poor electrical connections on the wire harness at the transmission and finally, the transmission control module may have failed.
SOURCE: Hard Shift to 2nd Gear/next gear
Your going to have to get your car scaned for codes. Auto Zone can scan it for you for free and tell your what you'll need to fix it.
It sound's like your VSS Sensor (speed sensor) is not working and your ECM is not getting the signal from the transmission to know when to shift the gears.
Becareful not to burn out the transmission till you get it fixed. The sensor it self is not that expansive and to replace it is easy and takes about 30 min to do.
If you get a P0720 or a P0722 code, then it's your speed sensor. It's an esy fix and Auto Zone can give you instrction on how to change it.
Good luck, it takes about 30 min to change and hope this helps.
SOURCE: 1993 4l60e - Shifts hard on the 1-2 shift, works fine otherwise.
Did you change the transmission filter and gasket as well as the transmission oil before running your truck.
SOURCE: Shifts hard and jerks under hard acceleration.
thottle positioning sensor? if trans has overdrive could be a lock up piece, dont remember name of it. there is a lucas oil product that might help. if it is the overdrive.
SOURCE: 2000 impala ls trans problem
YOUR PROBLEM IS IN THE TRANSMISSION. THERE 'S A DEVICE CALLED A PCS (PRESSUE CONTROL SOLENOID) VALVE. THIS VALVE MAINTAINS PRESSURE DURING SHIFTING PATTERNS. IF THIS VALVE LOOSES PRESSURE YOU WILL EXPERIENCE THE "SHUTTER/SLIP" SENSATION. TAKE TO A DEALER IF IT'S STILL UNDER WARRANTY SO YOU DON'T BEAR THE BRUNT OF THE COST!!
SOURCE: Why is my gear shift so hard to move??
I believe your clutch is not disengaging fully. When this happens it may be hard to get into first gear but subsequet shifts are easier due to the fact the vehicle is moving. You probably have a hydraulic clutch system which is low on fluid or may have air in the system. Before shifting into first gear or reverse try pumping the clutch pedal 5 or 6 times then shifting, if it goes into gear easier after this then you probably have air in the system, it can be bled similar to bleeding brakes. If this doesnt work you might be low on fluid, or have a bad master or slave cylinder.
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