Lubrication

CAUTION: Additives and friction modifiers are not recommended for use in ZF Transmissions.

ZF Transmissions are designed so that the internal parts operate in an oil bath circulated by the motion of the gears and shafts. All parts are amply lubricated if these procedures are followed:
^ Maintain the correct fluid level by inspecting it regularly.
^ Change the fluid at recommended intervals.
High operating temperatures increase the lubricant's rate of oxidation and shorten its effective life. When the average operating temperature is high, the Transmission may require more frequent fluid changes. The following conditions in any combination can cause high operating temperatures:
^ operating consistently at slow speeds
^ high ambient temperatures
^ restricted air flow around the Transmission
^ exhaust system too close to the Transmission