Shift Conditions

Bump - a sudden and forceful application of a clutch or band.
Chuggle - a bucking or jerking condition that may be engine related. May be most noticeable when the converter clutch is engaged. 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. Also defined as "Late" or "Extended."
Double Bump (Double Feel) - two sudden applications of the clutch or band.
Early - a condition where the shift occurs before the vehicle has reached a proper speed and tends to labor the engine after the upshift.
End Bump - a firmer feel at the start of the shift as compared to the feel at the end of the shift. Also defined as "Feel" or "Slip Bump."
Firm - a noticeably quick application of a clutch or band that is considered normal with a medium to heavy throttle shift.
Flare - a quick release in engine RPM accompanied by a momentary loss of torque. This most generally occurs during a shift and should not be confused with "Harsh." Also defined as "Slipping."
Harsh (Rough) - a more noticeable application of a clutch or band as compared to "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. An example could be described as a 3-2-3 shift pattern. Also defied as "Busyness."
Initial Feel - a distinctly firmer feel at the start of a shift as compared to the harsh of the shift.
Late - a shift that occurs when the engine is at a higher than normal RPM for a given amount of throttle.
Shudder - a repeated jerking sensation similar to "Chuggle" but more severe and rapid in nature. This condition may be most noticeable during certain ranges of-vehicle speed. It may also be used to define the condition. after converter clutch engagement.
Slipping - a noticeable increase in engine RPM without a speed increase in the vehicle. A slip usually occurs during or after initial clutch or band engagement.
Soft - a slow, almost unnoticeable clutch application with very little shift feel.
Surge - a repeated engine related feeling of acceleration and deceleration that is less intense than "Chuggle."
Tie-Up - a condition where two opposing clutches are attempting to engage at the same time causing The engine to labor with. a noticeable loss of engine RPM.