Cable too slack.
gear ratio
check the exhaust system
My 1997 would not shift out of first gear, was 'throttle position sensor'.
check the U-joints in the drive line
Yep, then shift from second to third gear.
There are several things that can cause your automatic transmission not to go into first gear. The most common cause is low transmission fluid.
Shift linkages not put in the correct spots.
Several things can cause your transmission to be stuck in second gear. Broken or detached shifting linkage will cause the problem. A broken shifting for in the transmission can also cause the problem.
maybe you broke something!
There are several things that can cause your 2005 Jeep manual transmission to shift hard between first and second gear. The most common cause is a malfunctioning shifting fork.
To fix a gear shift light, the first thing that needs to be done is checking the fuse box to make sure that all fuses are intact. The reason you would fix a gear shift light is, so you know what gear you are in. Driving in the wrong gear can cause transmission problems.