PREVOST H3-45 VIP Owner's Manual page 225

Allison Transmission Other Features C-5
clutch maintenance is required. The clutch life status
is determined by monitoring changes and the
calculated running clearance of the transmission
clutches.
Clutch Maintenance Notification
The transmission health monitor feature determines
when clutch maintenance is needed. If any of the
clutches (except lockup) reaches a remaining life of
approximately 10% or if any of the clutch running
clearances exceeds a maximum value, then the
TRANSMISSION SERVICE indicator is steadily
illuminated from just after ignition on until ignition is
turned off. Thereafter, the indicator will be lit upon
each initialization of the TCM, and will remain on
steady during all vehicle operation until service is
performed and the indicator is reset. If the
transmission health monitor mode has been
accessed via the shift selector, a "TRANS HEALTH
OK" or "TRANS HEALTH LO" is displayed. An
acceptable clutch life status is displayed as "TRANS
HEALTH OK". An unacceptable clutch life status is
displayed as "TRANS HEALTH LO".
PA-1638 Owner's Manual X3-45 VIP