Zf 8 Speed Transmission Fluid Change Interval 2025. In most, if not all other vehicles that have the 8 speed zf transmission, the manufacturer recommends a transmission fluid and filter change at 70,000 to 80,000 miles. If your ram is under oem warranty, make sure you follow their guidelines or you could void your warranty.

Zf recommends a procedure for a fluid change that involves shifting in & out of certain gears for specific times & verifying the fluid temp @ 40c before topping off:. It must be between 30°c and 35°c max.