Added fixed 150mm mortar
Update acf_gearbox.lua

Added "RPM increase" to the Double Differentials. The engine would become bogged down too much for turning, so this should fix the issue by maintaining RPM and in turn maintaining torque for turns.
Merge pull request #85 from Scottyprogrammer/master

Update acf_gearbox.lua
Version
Merge remote-tracking branch 'remotes/upstream/master'

Conflicts:
	lua/autorun/acf_globals.lua