Mazda 2006 MX-5 Service Highlights page 285

POWER PLANT FRAME (PPF) FUNCTION [M15M-D]
Features
• The power plant frame (PPF) maintains rigidity with a bracket installed between the transmission and the
differential. Due to this the shift feeling is solid and a feeling of direct drive when starting from a standstill or
accelerating is created.
Vehicle without PPF
— In order to suppress the transmission of excessive vibration to the vehicle body, rubber mounts are used to
connect the differential to the frame. When accelerating rapidly, the front part of the differential lifts upward
which causes a time lag in the actual engine torque being transmitted to the tires and direct drive feeling is lost.
Vehicles with PPF
— With PPF, the transmission and differential are joined in a single unit which, even though the differential is can
be separated from the body, time lag is lessened due to the near elimination of lift, creating a feeling of direct
drive. Furthermore, shock and vibration during acceleration and deceleration is greatly reduced.
WITHOUT PPF
WITH PPF
End Of Sie
MANUAL TRANSMISSION [M15M-D]
POWE PLANT F AME (PPF)
LIFT
UBBE MOUNT
05–11A–7
E5U051100000N21
05–11A
E5U513ZS5040