Originally Posted by jpn
I will double check the meshing, could have been too tight, metal to metal contact caused too much heat wearing out the gears prematurely
Hey what's up it happened to me after a few races, they had a little over 12 gallons if I remember correctly. I had the shims on the wrong side but I also was using a grease that was too thin and it didn't stick to the gears.
Now I have the two stock shims on the same side as the ring, and I use either copper grease, black graphite grease or black Moly grease. The black moly grease really sticks to the gears. At the state championship 2weeks ago the car ran good during the entire main and there is no sign of wear on the gears post-race.
If your mesh is a bit loose I think the gears will last a bit but will shave down and strip eventually. I think that the grease does make a difference.
You can make sure you don't overtighten the bulkhead screws.
Edit: Another thing I noticed is that it helps to make sure you tighten the diff screws evenly (not too tight, they hold in place really well because they are thin threaded) step by step to make sure the ring is perfectly flat on the diff housing...
Also, when you change the Ring/Pinion I think it's safer to change the diff housing along with it.