96 Dodge caravan does not shift and stays in second gear why

Question edited for clarity.
Question moved to model category.

You may not need to replace, you can repair.

https://www.google.com/search?q=2012+Dodge+Grand+Caravan.+replacing+gear+shift+cable

It is common for rpm's to increase, as the acceleration increases... That is when the transmission comes into effect, when the RPMs increase, the next gear is then shifted into.
if the RPMs continue to increase, then the transmission is not shifting. It's possible that you have a transmission or torque converter problem.

Transaxle is done

Has to be rebuilt,a well know &
given fact, on all carvans for 30 years

The default gear for your caravan when there is a transmission issue is second gear. If it is stuck in second gear than the check engine light should be on. The OBDII code stored in the PCM should be a P0700. This code is to let you know there are transmission codes stored in the TCM. You will need a high end scan tool to get those codes. Once you know those codes you will have a much better idea of what is causing the transmission problems. Let me know if you have any questions and I'll do my best to answer them. Thank you for using FixYa.com!

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Most likely the second gear section of the transmission has gone bad. There are 3 or 4 different gear sections or assemblies in an automatic transmission, when they go bad, they go bad.

Check the fluid level sounds like it is low or the filter may be plugged.

the transmission has shift solenoids. You have a bad one not operating to shift the trans in all gears

might be in limp in mode.check fluid level.if fluid level is ok unhook battery for 30 seconds then recrank vehicle.if it does not shift gears or does shift a few times then quits again would suggest letting a transmission expert look at it as you might have a sensor problem or a leak internally.

I am looking for a diagram that shows were the speed sensor is located on the transmission.Of a 96 Grand Caravan.

Yep ,sounds like limp mode ,should be in second gear.
Try,key on engine off,depress accelerator to floor 3 times within 5 seconds.Should reset trans.