now this problem hasn't been bothering me lately, but nakakainis din pag lumilitaw.

There's a "thug" feeling from my GX when stopping at a stop light. It feels like you got rear ended sa likod but when u look, there's no one there. Dealer has attempted to fix it, replacing the driveshaft a couple times, and greasing it up. Now i heard that they have a new TSB fix for it, but kinakabahan ako. Any suggestions kung ano talaga ang problema???