Yes they do, it has several. The most common is the shift solenoid which is located in the oil pan for the transmission.
yes
On a 1996 4runner the transmission shift solenoid is under the pan in the valve body. There are two shift solenoids on the 4runner.
Your 1996 Geo Metro's automatic transmission may not shift into first gear due to several potential issues, such as low transmission fluid levels, a faulty transmission solenoid, or a malfunctioning throttle position sensor. Additionally, a clogged filter or internal transmission damage could also prevent proper shifting. It's best to check the fluid level and condition first, and then consider having a professional inspect the transmission for more complex issues.
transmission goes into gear but wont hardly move
It is inside the transmission
It's on the drivers side of the transmission.
It is bolted into the transmission valve body. You will have to remove the transmission pan to get to them.
Check transmission fluid level Change transmission fluid and filter
No, a 91 metro transmission will not fit in a 98. A 91 will fit any metro between 1988 - 1996 though. After 1996 a lot of Metro's became 4 Cylinder which made them different from the previous generation metros. It may fit if the engine sizes are correct (1.0 litre 3 cylinder to the same but do not mix and match).
5w 30 or 10w30
1996 metro calls for dextron 2, should tell you on your transmission dip stick