A bypass block for lubricant for use with an existing combination of an unregulated pressurized gearbox and a pressurized filter comprising: a bypass valve; a lubricant inlet in fluid communication with the bypass valve; a bypass outlet in fluid communication with the bypass valve; and a lubricant exit; and wherein: the bypass block is separate from a housing of the unregulated pressurized gearbox and configured to be attached to the housing of the unregulated pressurized gearbox and the pressurized filter such that, when in use, the bypass valve is upstream from the pressurized filter, the lubricant inlet is in fluid communication with the unregulated pressurized gearbox, the bypass outlet is in fluid communication with the unregulated pressurized gearbox, and the lubricant exit is in fluid communication with the pressurized filter and the unpressurized regulated gearbox; the bypass outlet is separate and spaced apart from the lubricant exit on an outer face of the bypass block, the outer face being configured to attach to the housing of the unregulated pressurized gearbox; and when the bypass block is attached to the unregulated pressurized gearbox and the pressurized filter, the bypass valve is configured to open to divert a lubricant when the lubricant is cold and pressure at the bypass valve is high into the unregulated pressurized gearbox through the bypass outlet to reduce damage to the pressurized filter from high pressure; and the bypass valve is configured to close to allow a lubricant into the pressurized filter from the lubricant inlet and out of the pressurized filter through the lubricant exit when the lubricant temperature is increased and the pressure is reduced. a bypass valve; a lubricant inlet in fluid communication with the bypass valve; a bypass outlet in fluid communication with the bypass valve; and a lubricant exit; and wherein: the bypass block is separate from a housing of the unregulated pressurized gearbox and configured to be attached to the housing of the unregulated pressurized gearbox and the pressurized filter such that, when in use, the bypass valve is upstream from the pressurized filter, the lubricant inlet is in fluid communication with the unregulated pressurized gearbox, the bypass outlet is in fluid communication with the unregulated pressurized gearbox, and the lubricant exit is in fluid communication with the pressurized filter and the unpressurized regulated gearbox; the bypass outlet is separate and spaced apart from the lubricant exit on an outer face of the bypass block, the outer face being configured to attach to the housing of the unregulated pressurized gearbox; and when the bypass block is attached to the unregulated pressurized gearbox and the pressurized filter, the bypass valve is configured to open to divert a lubricant when the lubricant is cold and pressure at the bypass valve is high into the unregulated pressurized gearbox through the bypass outlet to reduce damage to the pressurized filter from high pressure; and the bypass valve is configured to close to allow a lubricant into the pressurized filter from the lubricant inlet and out of the pressurized filter through the lubricant exit when the lubricant temperature is increased and the pressure is reduced. the bypass block is separate from a housing of the unregulated pressurized gearbox and configured to be attached to the housing of the unregulated pressurized gearbox and the pressurized filter such that, when in use, the bypass valve is upstream from the pressurized filter, the lubricant inlet is in fluid communication with the unregulated pressurized gearbox, the bypass outlet is in fluid communication with the unregulated pressurized gearbox, and the lubricant exit is in fluid communication with the pressurized filter and the unpressurized regulated gearbox; the bypass outlet is separate and spaced apart from the lubricant exit on an outer face of the bypass block, the outer face being configured to attach to the housing of the unregulated pressurized gearbox; and when the bypass block is attached to the unregulated pressurized gearbox and the pressurized filter, the bypass valve is configured to open to divert a lubricant when the lubricant is cold and pressure at the bypass valve is high into the unregulated pressurized gearbox through the bypass outlet to reduce damage to the pressurized filter from high pressure; and the bypass valve is configured to close to allow a lubricant into the pressurized filter from the lubricant inlet and out of the pressurized filter through the lubricant exit when the lubricant temperature is increased and the pressure is reduced.