There is no way to change gear ratios.
Trouble code P0731 means: Incorrect gear ratio, first gear
There are a couple of reasons why a 1993 Mercury Villager is hard to shift. One reason could be a gear shift cable. Another reason could be low transmission fluid.
You must remove the instrument cluster to do so.
Take it to a trusted transmission expert ASAP. You have a serious transmission problem. Continuing to drive the car may do irreparable damage.
If it's in limp-in mode you need to take it to a transmission shop and have it diagnosed.
These parts are probably not available new any more. You'll have to get them from a salvage yard.
It is in limp mode because there is a serious failure in either the transmission or the control module.
The diagnostic code PO735 on a Mercury Mountaineer indicates that the 5th gear has an incorrect gear ratio. This can be the result of a broken servo shaft.
The stock 1997 Ford Ranger typically comes with a gear ratio of 3.73:1 for the rear differential. This means that the driveshaft will rotate 3.73 times for every rotation of the rear wheels. The gear ratio is important for determining the vehicle's torque and speed characteristics. Different gear ratios can be installed to optimize performance for specific driving conditions.
The front axle gear ratio for a 1997 Jeep Wrangler can vary depending on the specific model and options. Common gear ratios for this model include 3.07, 3.55, 3.73, and 4.10. It's important to check the vehicle’s specifications or the build sheet for the exact ratio of a particular Jeep Wrangler.
The towing capacity of a 1997 Chevy Tahoe 4 door 4 wheel drive truck with a 3.73 gear ratio is 7,000 pounds.
that would be because you need to add transmission fluid... they don't work too well when they are low