I've pulled the engine in my Ram 50 4x4 to replace the clutch, main seal and fix some other oil leaks. After removing the clutch I found the pilot bearing was seized and that it wore a .375 x .012 groove in the spline end of the main drive gear assembly (input shaft). Since even a new pilot bearing won't properly support the shaft end, what options do I have other than a trans tear down and replacement of the main drive gear assembly - something I'd really like to avoid.

Thanks