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Our journey begins where the magic starts — live support from real humans. Our team helps you choose the right transmission for your needs Monday through Friday, 9–6 EST.
Behind the scenes: a massive core warehouse stacked to the ceiling. Our #1 transmission — the 6L80 — starts here. Strong supplier relationships ensure high-quality, rebuildable cores.
Once your order is placed, your matching core is selected and torn down for a full inspection. Only quality cores pass to the next phase.
Cleaned. Prepped. Painted. We coat every unit in Monster’s signature bold colors — so your transmission looks as good as it performs.
High-performance internals. Custom configurations. Every build is hand-assembled by Monster techs to match your horsepower, torque, and application needs.
We caught a 700R4 headed into a '63 Impala with a 350 small block. This StreetMonster build offers overdrive, fuel efficiency, and serious performance.
Each Monster build is tested on our Mustang Dyno. Your transmission comes with a dyno sheet so you know it’s ready to run the moment it arrives.