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

Cryo, polishing, and **** does have a benefit, but it isn't cheap for the little extra you gain.
The bearings would be a nice upgrade.
What really makes the difference is making sure everything is in spec and adjusted/tuned correctly.

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. 

Usually only nikasil aluminum.

heat treat a skid plate? talk about a waste of money.

Has redoing the heat treatment on the modified gears ever been done? There is certified heat treating near me, I've had a 4130 chromoly skid plate done. Wasn't cheap but a lot cheaper than getting my aluminum skid plates done...

Carburizing is the process used on gears to case harden the wearing surfaces while leaving the base material a little softer so the gear is tough and not brittle.  The carburizing process penetrates the base metal but also builds up on all of the surfaces changing the dimension of everything it builds up on.  The amount of build up is predictable so all of the original dimensions have to be made undersized.

Re-carburizing would make the gears not fit over the splined shafts and the mesh of the teeth would be too tight. 

Dezsled, I have the same dryer.