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Restore Speedometer Accuracy for Larger Tires: Complete your lift upgrade with Rough Country's Speedometer Calibration Device. Specifically engineered for lifted vehicles with oversized tires, this easy-to-use calibrator reprograms your speedometer to deliver precise, true-speed readings, eliminating guesswork on the road or trail. Seamless Plug & Play Installation: Installation is fast and hassle-free thanks to a simple plug and play connection through your vehicle's Diagnostic Link Connector Port. In just a short session, your speedometer is recalibrated to match your new tire size without the need for complex tools or programming knowledge. Enhanced ECM Shift Point Adjustments: This advanced device doesn't just update your dashboard, it updates your vehicle's ECM to optimize transmission shift points. That means smoother shifting performance tailored to your new tire configuration for a more refined driving experience. Maintains Electronic Stability Control Performance: Rough Country's calibrator also recalibrates your Electronic Stability Control system, ensuring your vehicle retains factory-intended handling and safety even after upgrading to larger tires. Convenient Return to Stock Settings: Need to revert back to factory calibration? The device includes an easy reset feature that lets you restore stock settings anytime, ideal for vehicle servicing. Warranty-Backed Peace of Mind: Backed by Rough Country's 1-Year Warranty, you can recalibrate with confidence knowing your investment is protected.
Corrects Speedometer for Larger Tires: Accurately recalibrates your speedometer to reflect true speeds after upgrading to oversized tires.
Hassle-Free Plug & Play Installation: Simple, tool-free connection makes setup quick and effortless.
Optimizes OE ECM Shift Points: Automatically adjusts factory transmission shift points for smoother performance with larger tires.
Stabilizes Electronic Stability Control: Recalibrates your ESC system to maintain factory-like handling and safety with bigger tires.
Easy Return to Stock Settings: Conveniently restore factory calibrations at any time.
Backed by a 1-Year Warranty: Drive with confidence knowing your purchase is protected.
Download the latest software update here. Fits both gas and diesel models. This programmer is designed to function as a standalone unit and is NOT compatible with any type of performance programmer. Does NOTfit 2020+ models with parking assist. Does NOT fit models with digital instrument cluster. Emissions Certifications: Not for sale or use in California. Rough Country's Speedometer Calibrator can only be used with one vehicle at a time. As with all other programmers, once programmed, the programmer is locked to that vehicle and cannot be used with any other vehicle.
Fitment Year: 2019 2020 2021 2022 2023
Make: Ram
Model: 2500
Submodel: Big Horn
Drive: 4WD
Install Time: 1-2 hours
Manufacturer SKU: 90047
Legacy SKU: 90047T
Most products ship directly from our vendor warehouses or distributor network. Shipping times can vary depending on the brand, product size, availability, and destination.
Large or oversized items such as lift kits, wheels, tires, bumpers, exhaust systems, and audio enclosures may require additional handling time or freight shipping.
If there is ever an issue with availability, shipping cost, or delivery timing, we will contact you before moving forward with the order.
Returns may be accepted on most new, unused, unopened items within 30 days of delivery. Items must be in original packaging and in resellable condition.
Installed, used, damaged, missing-parts, electrical, special-order, clearance, or custom-built items may not be eligible for return.
Return shipping is normally the customer’s responsibility unless the return is due to our mistake, such as the wrong item being shipped.
Before sending anything back, please contact Kaos Offroad so we can review the order and provide return instructions. Returns sent without approval may be refused.
Some products are vehicle-specific. Please verify fitment before ordering. If you are unsure, contact us with your year, make, model, sub-model, and any relevant details before purchasing.
Original shipping charges, freight charges, and vendor restocking fees may be non-refundable depending on the item and supplier policy.

