This is our billet 25% primary reduction for the DCT Rubicon and DCT Rancher 420. Model designation on frame decal must include an "A" such as TRX420FA. Wide open auto shifting is affected but drivability is retained. On non-power steering models wide open auto shifting is affected but drivability is retained. If you choose to correct wide open auto shifting you will need to add one shift module to your order. **Power steering models must run two modules or the machine will not shift through all gears. The modules can be found in the "Parts" section of the site.