Will not shift water in tranny how to fix - 1996 Plymouth Grand Voyager

what does correctly mean. there are like 50 failing symptoms in the box.
a huge list. but common are.:

1. all gears 100% dead, PRNDL( R&D&L) all dead and act like Neutral
2. DRIVE acts like neutral or is Neutral shift linkages bad.
3. drive works in 1st gear but does not up-shift, at all.
4. drive works but 3 or 4th gear fail to happen.
5. in drive the tranny is locked into 2nd gear fixed. this is tranny limp home ,so scan the PCM/TCM for tranny errors.
6. in drive the 1>?2 up-shift goes to a false neutral (called flare) RPM goes why high
7. and lots and lots more, it is a complex device/system

the causes and tests posted here 1000 times.
endless it was. or 1billion times www., it seems

the so called ON CAR checks.

• fuses all good
• levels good, hot/idle, in park L>>>>X<<<<H (between L and H) never over or under. ATF dip stick gandering.
• scan the PCM/TCM for tranny errors heck ANY ! and share them.
• check shift linkage if tranny dead, the service manual even shows proving,each selection PRNDL works, even to the point of cant push car in park test. and can push in N. and more, in the book just this 1 test.
• dip stick end looks like tar, or metal dust or smells burnt. (doomed)
• and last the SM book shows the tranny pump port checks done at PRNDL
• the side ports and a 300psi gauge tests, that must pass.
• Tranny pan filter packed.
• Tranny filter cracked and sucks air, oops
• scans show shift solenoids failing, DTC errors. share them.
• and more, sure.

With the shift linkage disconnected from tranny, can you shift tranny by hand? If not, sounds like a tranny issue. There are safety issues with taking shift linkages loose from tranny, You have to sure vehicle can't roll, incase you do shift it. Safety is your responsibility.
Is this automatic or manual tranny?
Is the vehicle on level ground? Usually, you set the parking brake before you kill it, so the tranny isn't holding the vehicle. If the vehicle has a bind on the tranny, it may not want to shift?
I don't know year--make--model? I'm not a tranny person.

Check the emc on the tranny. Ford and chevy have a problem with the location of where the tranny ecm is located. It it located where water soaks it. Also, check the tranny fluid, if it out it won't shift into gear.

run the fault codes as there may be a problem i he VSS or TCM module

the reverse high clutch pack is wore out in the tranny you will have to rebuild it there no other fix!

is trany just burning fluid through a fault in the trans,eg...shift solenoids or electronic or hydraulic prob,is trans cooler ok..especially if its connected to radiator,is water or coolant geting into trans fluid,if pinkish color probably yes

Try some Lucas Transmission fix. that stuff has done wonders for almost all of my tranny problems

yes

The Buick (GM) Corp, has offically released this as an on-going problem with this style of tranny, but will not issue a recall. Basically, it can only be fixed by replacing the pressure valve within the tranny. This is a costly fix (400 to 650, depending on the shop). The pressure valve (over time) wears a groove between the valve cylinder wall and piston (of valve) which allows tranny fluid to bypass thru the line, thus causing the hard shifting, mostly when the tranny is hot and the fluid is thin. Trust me when I say, no other fix will work, such as changing tranny fluid, flush and fill, or any additives such as Seafoam or other tranny slip or fix additives. Bite the bullet and find a tranny shop which will give you a LIFE TIME warranty, mostly, in case they install yet another defective valve.

HAVE TO SHIFT THE TRUCK MANUALY