hello everbody I been rebuilding my 1990 lt500 that i got new and i been reading some thing about having the gears cut ,cryio and micro polished or having them coated is there any benifits of having this done it seems that the tranny would run cooler and shift better also i have been getting every hybrid ceramic bearing that i can for the  transmission what do you guys thing any anwser will be appericated thanks P.S this is not a hobbie it is a disease

Back cutting is a good way to save a gear that has the corners on the shift dogs rounded off.  The problem with back cutting the shift dogs is it removes the case hardening that is about .025" thick and will not take as long for the new soft corners to round off.  When the backcut angle is severe enough to really keep the gears engaged when under power, it makes disengagement more difficult and sometimes makes life of the shift forks shorter.

Cryo, ceramic bearings and micro polishing will not hurt anything but is not a very cost effective means to gain power or longevity of the transmission.  Money spend for these operations could be better spent toward porting, head mods, carb mods, or a good exhaust system. 

I find customers typically spend a lot of money in these areas first where the return on their money is not measurable.  We get a lot of guys reporting how well their transmissions shift and stay in gear after we back cut a set of gears that had the corners of the shift dogs rounded off.  If they had just replaced the gears with new ones, they would have got the same results with a longer lasting gears.