By Jon Crowley
Larger tires, portal gear lifts and added horsepower can expose weaknesses in a UTV drivetrain—especially when a driver needs reverse under load. SuperATV’s Complete Geared-Reverse Transmissions replace the reverse chain used in several Polaris RZR, GENERAL and RANGER transmissions with a gear-driven system while upgrading the case, gears, output shaft and pinion support.
These are complete, assembled replacement transmissions rather than rebuild kits. SuperATV describes them as Turbo-style, drop-in units engineered for specific Polaris applications without requiring vehicle modifications. Stock gearing and several lower-ratio configurations are available, depending on the model.
Why Replace the Factory Reverse Chain?
Several naturally aspirated Polaris transmissions use a chain to transfer power in reverse. That arrangement can become a weak point when reverse is used aggressively with oversized tires, added vehicle weight or a machine wedged against an obstacle.
SuperATV replaces the chain with a dedicated reverse gear. The company rates this geared-reverse arrangement at three times the strength of the original reverse chain. That claim is particularly relevant for rock crawlers and mud machines, where backing out of a ledge, rut or mud hole can place a substantial shock load on the drivetrain.
Geared reverse does not make every part of the driveline unbreakable, but it removes the factory reverse chain from the load path and eliminates one known failure point.
Upgraded Pinion and Snorkel Gears
The reverse system is only part of the upgrade. SuperATV also replaces the factory pinion and snorkel gear set with larger components modeled after the hardware used in a turbocharged RZR transmission.
Key components include:
- Heavy-duty 9310 steel pinion shaft and gears
- A 300M front output shaft
- Hob-cut, heat-treated and precision-ground gears
- A 6 mm-thick pinion-bearing retainer with a six-bolt pattern
SuperATV rates the upgraded pinion and snorkel gear assembly at 2.5 times the strength of the stock components. The thicker retainer is intended to support the gearset and maintain proper mesh when the transmission is subjected to high loads.
Reinforced Transmission Case
Each complete transmission is assembled in an upgraded cast-aluminum case. SuperATV adds material around the snorkel tube and axle-output areas, along with additional ribs and gussets to reinforce the housing. Larger exterior fins increase surface area to help dissipate heat.
The reinforced case matters because stronger internal gears cannot provide their full benefit if the housing flexes, cracks or allows the gearset to move out of alignment.
Available Gear Reductions
Depending on the application, SuperATV offers the transmission with stock gearing or 12.5%, 25% and 37.5% reductions. Not every ratio is available for every vehicle or OEM transmission number.
Lower gearing multiplies torque at the wheels and can help compensate for the effective gearing change created by taller tires. It can also provide better low-speed control in rocks, mud and steep terrain. The tradeoff is increased engine rpm at a given vehicle speed and a reduction in theoretical top speed.
| Gearing | General use | Primary tradeoff |
|---|---|---|
| Stock | Stock-size tires and general trail use | No additional torque multiplication |
| 12.5% reduction | Mild tire-size increases and mixed riding | Moderately higher cruising rpm |
| 25% reduction | Larger tires, technical trails and heavier builds | Greater effect on engine rpm and top speed |
| 37.5% reduction | Specialized rock or mud builds where offered | Largest reduction in speed for a given engine rpm |
The ideal reduction depends on actual tire diameter, vehicle weight, riding speed and whether the machine also uses geared hubs. A UTV equipped with portal gear lifts already has reduction at the wheels, so the portal ratio should be considered before selecting additional transmission reduction.
No Turf Mode
SuperATV’s geared-reverse transmissions do not retain Turf Mode on applications originally equipped with it. Turf Mode unlocks the rear differential to reduce ground disturbance and tighten the turning radius, but it also adds internal components that can become a durability concern under aggressive use.
Removing Turf Mode simplifies the transmission and prioritizes strength, but owners lose a useful feature for lawns, sensitive terrain and tight low-speed maneuvering. That makes this a significant purchasing consideration rather than a minor specification.
Current Polaris Applications
SuperATV currently lists Complete Geared-Reverse Transmissions for the following Polaris model families:
- Polaris RZR 900
- Polaris RZR Trail 900
- Polaris RZR Trail S 900
- Polaris RZR S 1000
- Polaris RZR Trail S 1000
- Polaris RZR XP 1000
- Polaris GENERAL 1000
- Polaris RANGER XP 900
Exact model-year coverage, OEM part-number compatibility and available reductions vary. Buyers should identify the original transmission part number and confirm fitment before ordering.
The Polaris GENERAL XP 1000 should not be confused with the GENERAL 1000 in this lineup. SuperATV currently lists a separate Complete Heavy-Duty Transmission for the GENERAL XP 1000, but not a Complete Geared-Reverse Transmission.
Geared-Reverse vs. Complete Heavy-Duty Transmissions
SuperATV sells both Complete Geared-Reverse Transmissions and Complete Heavy-Duty Transmissions for some Polaris platforms. The product names are similar, but they are not interchangeable descriptions.
The geared-reverse models use the Turbo-style gear-driven reverse system covered here. The separate heavy-duty units upgrade the original transmission architecture and are generally less expensive, but they do not provide the same geared-reverse conversion. Confirm which version is selected before comparing prices or specifications.
Who Is This Transmission For?
The complete geared-reverse transmission is best suited to an owner who needs to replace a damaged or worn transmission and wants a substantial upgrade rather than a stock rebuild. It also makes sense for specialized machines with large tires, portals, added power or frequent high-load use in reverse.
For a lightly modified trail machine with a healthy stock transmission, the price and loss of Turf Mode may outweigh the benefits. Owners should also evaluate the rest of the driveline. A stronger transmission can transfer more load to the prop shaft, differentials, axles and wheel hubs. Related upgrades include SuperATV Rhino Driveline prop shafts and Rhino 2.0 axles.
Final Thoughts
SuperATV’s Complete Geared-Reverse Transmissions address more than the factory reverse chain. The package combines gear-driven reverse, upgraded pinion and snorkel gears, a 300M output shaft, stronger pinion support, a reinforced case and optional lower gearing in a complete assembled unit.
The benefits are aimed squarely at demanding builds, but the compromises deserve equal attention. Lower ratios affect cruising rpm and top speed, Turf Mode is eliminated, and correct fitment depends on the vehicle’s year and original transmission part number. Matching the configuration to the complete build is essential.
More Information: SuperATV Complete Transmissions
