Great, I will check pressure and even replace if need be. How do I clear tranny codes?

Also I found this statment on another forum, is this true?

"The ABS part of it is where the speed of all 4 wheels is known, then ABS knows what to do when its needed. The same signal is required by the gearbox to know what gear to be in, when the signal is missing it goes into the limp home mode (2nd)."

Thanks