Best way to fix the Slash is to buy an SC10.
Even after all of the upgrades, the Slash still has a crappy, loud, and huge tranny, slipper design is horrible, suspension and link geometry suck, shock suck, need I go on?
All I have done to my SC10 for preventative measures is switch out the front A-arms to GT2 arms and added a chassis brace.
My highly modded TT Slash.
My Sc10.