May konting kadyot dapat as in minimal kasi from neutral, mageengage ka ng gear eh. Pero if the shock is talagang parang "thud", ibang usapan na...

Pag bagong kuha ng 2nd hand na AT, first thing to do is to change ATF. Honda nga pala mapili sa ATF, might as well use Honda tranny fluids (not necessarily casa, but there are 3rd party ATFs na pang honda talaga. Dunno what the difference is from DEXRON/MERCON/DONAX type of ATF but laging may hiwalay na ATF pag honda... )