Transmission service - part A Flashcards
what is one thing to do before checking the oil level inside the transmission
clear the dirt away from the filler plug to prevent contamination
what are some causes of oil leakage around gaskets and seals in a transmission
loose fasteners - worn seals or plugged transmission breather
before removing a transmission conduct a
visual inspection
what would misalignment in a transmission cause to prematurely fail
input shaft bearing failure - or slip out condition in the direct gear
what could cause a gear clashing complaint with damaged clutch components
clutch not releasing due to improper adjustment or worn input shaft splines
a damaged clutch break or seized input shaft bearing will also cause this failure
what would damaged torsional springs in the clutch cause
vibration or gear rattle complaint
what would driveline vibrations cause in the transmission
they would show up as gear rattle and are transmitted to the driver through the shift lever
what would driveline vibrations also cause
leaking output shaft seal and worn output shaft bearings .
what would gear shifting components that are loose, binding or out of adjustment cause
gear clashing and hard shifting
what are the common transmission complaints
vibration - slip out or jump out - hard shifting - gear clashing - excessive heat or noise
what is slip out or jump out
when the transmission moves to neutral on its own
when does slip out or jump out tend to occur
when torque is being applied to the drive line
some conditions that lead to slip out are
.transmission mounted eccentrically with the fly wheel pilot bearing
.worn mainshaft and out put shaft bearings
.insufficient pressure on the detent ( weak springs )
.excessive wear on the detent notch/ shift rail
.incorrect adjustment or excessive wear in the remote shaft linkage
when is jump out likely to occur
during rough or normal road conditions when there is no load on the driveline
what are some conditions that will cause jump out
. extra heavy and long shift levers that swing during operating over uneven terrain
. excessive movement between the transmission and shift linkage forcing the transmission out of gear
. weak or broken detent springs
what would cause hard shifting
the external shift linkage or the internal transmission components
what are some external linkage problems
. worn connections or bushings
. binding or improperly adjusted linkage
. lack of lubrication on the joints
. anything that obstructs the free movement of the shift lever