it may b the transmission sensor
The car doesn't want to shift properly.
Inside the transmission oil pan on the valve body
There are several things that can cause your Honda Accord station wagon automatic transmission not to shift down. The most common cause is low transmission fluid.
One of the reasons a Honda Accord with an automatic transmission may not shift out of first is there is not enough transmission fluid. The more likely reason is that the transmission has something broken in it and needs to be serviced or replaced.
If they are Automatics it will not shift properly. It would bolt up if they are the same engine.
There could be a number of reasons why your truck will not shift properly. There could be something wrong with your clutch or transmission.
How do I troubleshooting the D4 blinking on 1993 Honda accord LX ?
You may have a broken spring which disengages the transmission allowing it to shift or it is bad linkage going to the transmission.
LOOSE OR CORRODED ELECTRICAL CONNECTION?
A hard shift from first gear to second gear in the Honda Accord could be because of a linkage problem with the transmission. It could also be a problem with the transmission screen needing to be cleaned or low transmission fluid.