how to strengthen, & manulise, parts for gearbox to become more reliable as a skid gearbox,any suggestions or tunes to reduce blown gears 4 4l60 or 65

[05vzcommodore]

Hi everyone, ive got a vy ss that im going to turn into a proper skid car, any suggestions on mods, tunes, or parts to help reduce the likelyhood of blowing a gear or fully ******* the gearbox for a 4l60 and 4l65 gearboxes?. im not going to change gearboxes just gonna stick to the stock gearboxes on a vy ss but got no idea on how to improve them, how to make them hold gear without blowing through gear, or just making sure that after 4-5 sets the gearbox isnt gonna **** out. cheers everyone