MAXIMUM TORQUE: 42099 LEGO Technic extreme offroader => Crawler | I did maximum transmission torque just chaging 12 and 20 gears in the set. Then I've added RC tires and locked differentials.
MOC] LEGO Technic - 42099 B model 'Rocky' - YouTube
Amazon.com: LEGO Technic 4x4 X treme Off Roader 42099 Building Kit (958 Pieces) : Toys & Games