| Bump: A sudden and forceful apply of a clutch
or a band. |
| Chuggle: A bucking or jerking. This condition
may be most noticeable when the converter clutch is engaged. It is
similar to the feel of towing a trailer. |
| Delayed: A condition where a shift is expected
but does not occur for a period of time. This could be described as
a clutch or band engagement that does not occur as quickly as
expected during a part throttle or wide open throttle apply of the
accelerator, or during manual downshifting to a lower range. This
term is also defined as LATE or EXTENDED. |
| Double Bump - Double Feel: Two sudden and
forceful applies of a clutch or a band. |
| Early: A condition where the shift occurs
before the car has reached proper speed. This condition tends to
labor the engine after the upshift. |
| End Bump: A firmer feel at the end of a shift
than at the start of the shift. This is also defined as END FEEL or
SLIP BUMP. |
| Firm: A noticeably quick apply of a clutch or
band that is considered normal with a medium to heavy throttle.
This apply should not be confused with HARSH or ROUGH. |
| Flare: A quick increase in engine RPM along
with a momentary loss of torque. This most generally occurs during
a shift. This condition is also defined as SLIPPING. |
| Harsh - Rough: A more noticeable apply of a
clutch or band than FIRM. This condition is considered undesirable
at any throttle position. |
| Hunting: A repeating quick series of upshifts
and downshifts that causes a noticeable change in engine RPM, such
as a 4-3-4 shift pattern. This condition is also defined as
BUSYNESS. |
| Initial Feel: A distinctly firmer feel at the
start of a shift than at the finish of the shift. |
| Late: A shift that occurs when the engine RPM
is higher than normal for a given amount of throttle. |
| Shudder: A repeating jerking condition similar
to CHUGGLE but more severe and rapid. This condition may be most
noticeable during certain ranges of vehicle speed. |
| Slipping: A noticeable increase in engine RPM
without a vehicle speed increase. A slip usually occurs during or
after initial clutch or band apply. |
| Soft: A slow, almost unnoticeable clutch or
band apply with very little shift feel. |
| Surge: A repeating engine related condition of
acceleration and deceleration that is less intense than
CHUGGLE. |
| Tie-Up: A condition where two opposing clutch
and/or bands are attempting to apply at the same time causing the
engine to labour with a noticeable loss of engine RPM. |
