The following definitions are being provided to establish a common language
and assist users in describing transaxle related conditions. Some of these terms or
conditions are used in this service manual.
Shift Control Related
Binding : A shift condition where a driver feels resistance/light
friction when shifting into gear.
Cold gear clash: A grinding/growling sound that is made when
attempting to shift into gear during cold conditions.
Double bump: A shift condition where a driver experiences 2 separate
peak loads when shifting into gear.
Gear clash/grinding: A grinding/growling sound that is made
when attempting to shift into gear. Usually caused by a worn blocking ring or blocking
ring spring.
Gear rattle: A rattle that usually occurs at engine lugging
conditions or low idle speeds with the transaxle in neutral and the clutch engaged.
Hard shift (dynamic/engine running): Difficulty in shifting
when the vehicle is in motion.
Hard shift (static/engine off): Difficulty in shifting when
the vehicle is not moving.
Hop-out: A condition where the transaxle will consistently disengage
from the gear without operator assistance.
Intermittent hop-out: A condition where the transaxle will periodically
disengage from the gear without operator assistance.
Spline lock: A "scallop" feature machined alternately in the
internal spline of the synchronizer sleeve designed to engage with the gear (clutch
teeth) to prevent hop-out.
Noise Conditions
Final drive noise: A howl/whine related to vehicle speed and
is noticeable in all gears.
Gear noise: A whine that is due to gear contact that is related
to a certain gear and vehicle speed. The noise disappears after an upshift. The noise
is usually "gear profile" related.
Gear clicking noise: A ticking noise observed on every rotation
of a gear pair that is usually caused by a "nick" or "ding" on a gear tooth.