Hard shifts are not improved by any type of transmission fluid.
Your automatic transmission is controlled by a computer. When it detects certain faults, the computer puts the transmission into "high line pressure" mode, meaning that it's trying to protect itself.
If it's a really hard shift, it could be that the computer has detected a fault. On the other hand, if it doesn't shift hard when you're driving, it could just be that the idle speed is too high.
BTW, when the computer puts the transmission into "High Line", it also turns on the malfunction light.
on the transmission
A 97 Saturn that stays in forward gears could be one of two problems. Either the electronic transmission controls are stuck in forward, or the internal bands in the transmission have welded themselves together.
If the transmission is slipping or shifting badly it COULD be a sign of a valve body failure. If the transmission will not engage reverse or any of the forward gears, it COULD be a sign of a valve body failure.
The differential is bad inside the transmission.
find where the shift linkage connects to the transmission, on some model cars the neutral safety switch is there, it may be a multi switch also controlling the reverse lights.
Well, to start, the Saturn Vue wasn't available in 1994, may be your issue......
Most likely pressure control solenoid in transmission....Easily tested with proper scan tool ALSO try changing EGR valve. Will REALLY HELP!!!! I just changed mine, all my hard shifting and jerking in reverse went away.
The neutral safety switch is located on the back side of the transmission where the trans shift cable is attached. Please visit my Bio for a link to my saturn help site, under transmissions you will find an image of the neutral safety switch.
the reverse safety back up switch is located on top of the transmission next to the clutch resivior
most likely the hydraulic unit is empty and needs replace.To the right of the brake fluid reservoir is a smaller black reservoir for the clutch. Check the level If emptyt ot needs replace ----------------------
sounds like a motor or transmission mount is your likely problem
any auto transmission car that starts in neutral and not in park has a problem with the safety switch. Fix it or bypass it.