hmmmm...... I know DamageInc does gundoc work however since the gearbox is in pieces (and you tried doing it yourself) the cost is probably going to be quite steep.
I guess fiddling around with it a bit more couldn't hurt (you got it a bit better fiddling around with it) however you might inadvertently break it even more.
ಠ_ಠLess QQ more Pew Pew
READY TO >> RACE