Hopefully it's just in need of new fluids or a filter cleaning/replacement, but it could be an indication of a skrewy gearbox.
Any transmission related failure. You need to have the transmission computer checked for codes to know possible causes.
that is called Limp Home Modethis is caused by some sort of failure that the ECU has picked up
My 1997 Dodge Avenger automatic transmission stays in 2nd gear a the time. What seams to be the problem?
Will it bolt up? Yes.. Will it work? No.. The newer trans is a 5 speed automatic, the 93 is a 4 speed auto. The newer explorer will not shift properly, and won't have that 5th gear that it thinks it does. You will most certainly be throwing all sorts of transmission codes, and be stuck in "limp" mode.
your transmission is stuck in what we call limp mode. Take it to a transmission shop and have an electrical scan done. Does your speedometer work or not ? If not then it could be as simple as a output speed sensor or broken wire
If it's in limp-in mode you need to take it to a transmission shop and have it diagnosed.
Assuming it is an automatic, and you don't have any forward gear except second, you are probably in "limp-in mode". Something has failed in the control circuit for the transmission (computer, relay, wiring etc.), and the transmission defaults to the single gear to allow you to drive at reduced speeds to a repair facility, or just to get to a safe place to call for help.
The transmission computer has detected a malfunction and set a trouble code.
It could possibly, if it causes the computer to go into a limp home mode.
You need to have the computer checked for codes. That will tell you what area the problem is in. It can be wiring, computer, or even an issue with the new transmission.
This behavior is programmed into the transmission controller so that when its self-diagnostic capability has detected a fault that could cause damage it will only drive in 2nd gear which uses a minimum number of circuits. It is called "limp-in" mode. the best ting to do is to get a "readout of the transmission computer" (not th same plug as the engine computer) which is an electronic test for the presence of coded numbers representing different faults that the transmission is experiencing at the time when it locks up into 2nd gear.
There are several causes of a limp. Often it is caused by pain, weakness, neuromuscular imbalance or a skeletal deformity. However, the most common cause of a limp is physical trauma.