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Experience reliable performance with Monster's StockMonster 6L80E transmission—a 6-speed automatic built for strength, efficiency, and everyday drivability. Designed for light-duty trucks, SUVs, and cars, this transmission ensures smooth shifts and improved fuel economy. Featuring premium components like an upgraded pump, heavy-duty torque converter, and factory-spec engineering, the StockMonster is perfect for daily driving, towing, and light-duty tasks, delivering dependable power and durability.
Note
In-stock transmissions usually ship the next business day.
Custom builds or out-of-stock units typically ship within 2–4 weeks.
Need it sooner? Call us — we can often make special arrangements.
We offer the most comprehensive coverage in the industry:
Extend warranties are optional add-ons available during checkout.
No — we offer a $299 Flat-Rate One-Way Shipping to any address, commercial or residential.
If you find a better rate, you're welcome to arrange your own shipping.
No — due to the variety of tune files required, we do not pre-program 6L80/6L90 transmissions.
Each vehicle may require a unique calibration. For best results, programming should be done after installation, using a scan tool or tuning software.