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.
A little dirt never hurt: LEGO Technic 42099 4x4 X-treme Off-Roader [Review] - The Brothers Brick | The Brothers Brick
5 minute upgrade - turn the LEGO Technic 42099 4X4 X-treme Off-Roader into a capable crawler! - YouTube
4x4 X-treme Off-Roader : Set 42099-1 | BrickLink
LEGO® Technic review: 42099 4x4 X-Treme Off-Roader | New Elementary: LEGO® parts, sets and techniques
LEGO Technic 42099 4X4 X-treme Off-Roader stage 2 upgrade - even more power with only 4 extra gears! - RacingBrick
LEGO Technic 42099 4X4 X-treme Off-Roader stage 2 upgrade - even more power with only 4 extra gears! - RacingBrick
CUSTOMBRICKS.de - LEGO Technic Custom 42099 MOD - Ultimate RC modification parts MOC Instruction
4X4 X-treme Off-Roader 42099 | Powered UP | Buy online at the Official LEGO® Shop US
Amazon.com: LEGO Technic 4x4 X treme Off Roader 42099 Building Kit (958 Pieces) : Toys & Games