
LEGO SET 42135 - Alternate build | Monster Jam El Toro Loco
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LEGO Technic’s Monster Jam El Toro Loco set (42135-1) is packed with versatile beams, gears and wheels that beg to be reimagined. While the official model brings the iconic “El Toro Loco” monster truck roaring to life, the true magic lies in how its parts can be repurposed into wildly different shapes and functions. From nimble off-roaders to speedy racers, here are some ideas to spark your creativity — and below, a full gallery of 20 community-designed alternative builds you can try yourself.
Whether you’re new to Technic MOCs or a seasoned builder, these designs showcase the set’s flexibility:
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Transform the pull-back motor and massive wheels into buggies, choppers or even airplanes.
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Experiment with steering linkages and differential gears to craft everything from three-wheelers to trikes.
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Combine beams and panels in unexpected ways to reinvent the silhouette — think tractors, trucks, or racing machines.
Each model below was built only from the parts in set 42135-1. Dive into the gallery, pick a favorite, and let your next build be a tribute to the ingenuity of the LEGO community!
Alternative Builds Gallery
Below are 20 standout MOCs — click to jump to the instructions and start building.
Pullback X-treme Off-Roader
By hoppepe
Get the instructions: https://rebrickable.com/mocs/MOC-112994/hoppepe/42135-pullback-x-treme-off-roader/
BULLHEAD
By hoppepe
Get the instructions: https://rebrickable.com/mocs/MOC-139541/hoppepe/42135-bullhead/
El Toro Sherpo
By 13neat8
Get the instructions: https://rebrickable.com/mocs/MOC-130645/13neat8/42135-el-toro-sherpo/
Alternative Dune Buggy
By DamianPLE Technic Garage
Get the instructions: https://rebrickable.com/mocs/MOC-99004/DamianPLE%20Technic%20Garage/42135-alternative-dune-buggy/
PullBack MOCS
By Keep On Bricking
Get the instructions: https://rebrickable.com/mocs/MOC-111880/Keep%20On%20Bricking/42135-pullback-mocs/
Offroader
By hoppepe
Get the instructions: https://rebrickable.com/mocs/MOC-123469/hoppepe/42135-offroader/
Roadster “ElTo”
By hoppepe
Get the instructions: https://rebrickable.com/mocs/MOC-163816/hoppepe/42135-roadster-elto/
Forklift Tractor
By Keep On Bricking
Get the instructions: https://rebrickable.com/mocs/MOC-132594/Keep%20On%20Bricking/42135-forklift-tractor/
Dump Truck
By Keep On Bricking
Get the instructions: https://rebrickable.com/mocs/MOC-114154/Keep%20On%20Bricking/42135-dump-truck/
THR33 WH33L3R
By Keep On Bricking
Get the instructions: https://rebrickable.com/mocs/MOC-112158/Keep%20On%20Bricking/42135-thr33-wh33l3r/
Racing Truck
By Keep On Bricking
Get the instructions: https://rebrickable.com/mocs/MOC-111026/Keep%20On%20Bricking/42135-racing-truck/
Formula 1
By Keep On Bricking
Get the instructions: https://rebrickable.com/mocs/MOC-111122/Keep%20On%20Bricking/42135-formula-1/
Offroad Ranger
By Keep On Bricking
Get the instructions: https://rebrickable.com/mocs/MOC-113994/Keep%20On%20Bricking/42135-offroad-ranger/
Orange Chopper
By ErikGS
Get the instructions: https://rebrickable.com/mocs/MOC-136278/ErikGS/orange-chopper-42135-alternative/
Booster Buggy
By Keep On Bricking
Get the instructions: https://rebrickable.com/mocs/MOC-110363/Keep%20On%20Bricking/42135-booster-buggy/
Sand Stormer
By Keep On Bricking
Get the instructions: https://rebrickable.com/mocs/MOC-131003/Keep%20On%20Bricking/42135-sand-stormer/
Orange Tractor
By ErikGS
Get the instructions: https://rebrickable.com/mocs/MOC-136977/ErikGS/orange-tractor-42135-alternative/
Orange Airplane
By ErikGS
Get the instructions: https://rebrickable.com/mocs/MOC-138207/ErikGS/orange-airplane-42135-alternative/
Moto Trike
By Keep On Bricking
Get the instructions: https://rebrickable.com/mocs/MOC-112111/Keep%20On%20Bricking/42135-moto-trike/
Extreme Offroader
By ErikGS
Get the instructions: https://rebrickable.com/mocs/MOC-140617/ErikGS/extreme-offroader-42135-alternative/
With 20 different ways to unleash the power of gears, axles and beams, your next Technic build is only limited by your imagination. Which will you tackle first? Happy building!