masuk gear but tak jalan

[wadi_49]

hi...
anybody can help me...bila enjin sejuk and temp indicator belum sampai separuh, masuk D or R...kereta tak jalan..berat...kena push accelarator 2,3 kali baru ok but bila jalan..gear like knocking..sentap..bila dah panas..ok..
it's gearbox problem?
318, n42, 2002...

one more problem.
lower arm baru, tayar baru, front strut bar, stereng rack tukar but halfcut...
kereta still huyung hayang...kiri kanan..

tq...