Likely to be a worn 5th
gear synchronizer.
There are three components of wear I will consider: shift linkage,
gear synchronizers, and clutch throwout bearing.
I might come predisposed toward the marque, but I also bring exceedingly high expectations not limited to oil on the driveway and grinding second -
gear synchronizers.
Additionally,
the gear synchronizers utilize carbon - fiber cones, which also contribute to the ability to shift so fast.
Not exact matches
Because the
gears are different ratios (and therefore traveling at different speeds), the sleeve has a
synchronizer cone which is pressed up against the target
gear to match its speed before the sleeve slides all the way over.
If there is a speed difference between the sleeve, synchroniser hub and
gear, the sleeve is blocked by a «blocker ring» to prevent further travel of the sleeve, the
synchronizer ring creates friction to help match
gear speeds.
The
synchronizers have a wear material on them and can be shaped like a cone and once the speeds of the shafts match (through the
gear ratio), then the output shaft is connected to the
gear and everything is spinning and power can be applied by releasing the clutch pedal.
When you press the shifter to place the car into
gear, the
synchronizers in your transmission connect one of the pairs of
gears to the output shaft.
Appropriate coefficient of friction for most manual transmission
synchronizers (other's synthetic
gear oils are often too slippery for proper synchro engagement)
Transmission / transaxle case and all internally lubricated parts including ring and pinion
gears; oil pump, cover,
gears, housing and vanes; torque converter; valve body (s); throttle valve; valve pack; governor,
gear and cover; parking
gear and pawl; roll pins; sprags; sprockets; chain; springs; stator and shaft; pressure regulator valve; pressure switches; solenoids; bands; automatic transmission / transaxle clutch, drums, pistons and steel plates; planetary and sun
gears; servos and rings; blockers;
synchronizer hubs and keys; bearings; bushings; supports and shafts; control rings; yoke; extension housing; speedometer drive
gears; accumulators and rings; adjusters; all internal fasteners, nuts and bolts; shift cover and forks; separate bell housing; transfer case and all internal parts contained within the transfer case; seals and gaskets.
A
synchronizer, or «synchro,» lets the collar and
gear synchronize their speeds while they're already in contact but before the dog teeth engage.
There are three separate shift fork shafts, which hold three shift forks to activate the
synchronizer rings for the two gearsets on each of the three
gear shafts.
The most common reason a manual transmission would jump out of
gear is due to low or contaminated fluid, worn
synchronizers inside the transmission, or improperly adjusted shift linkage.
Failed
Synchronizer: If you have a manual transmission and you're experiencing a grinding sound when trying to shift
gears, the problem is likely to do with the
synchronizers.
Difficulty in engaging other
gears could be worn
synchronizers as well, or transmission...
Shift effort has been reduced with the use of dual - cone
synchronizers on second and third
gears.
Shifting performance is facilitated by durable triple - cone
synchronizers for first and second
gears, with double - cones for third
gear and a single - cone for fourth, fifth and sixth
gears.
If the clutch is functioning and thus ruled out, and there is adequate
gear oil in the transmission and the shift linkage is not faulty, then the likely cause is worn
synchronizers, hub
gear and so forth.
Manual transmission - gearshift lever, gearshift block, gearshift cable, transmission housing, transmission mounts, internal shift rods, internal shift forks, main shaft, secondary shaft, internal bearing and bushings,
synchronizers,
gear sets.
E-
gear - selector lever, e-
gear ECU, e-
gear switch selector mode, transmission speed sensor, mounts, kits e-
gear and components, transmission housing, transmission mounts, internal shift rods, internal shift forks, main shaft, secondary shaft, internal bearing and bushing,
synchronizers,
gear sets, reverse switch and transmission speed sensor.
Triple - cone
synchronizers for first and second
gear have also been re-profiled for five - speed gearboxes, and enlarged by 10 % for six - speed units.
The new transmission uses multi-cone
synchronizer rings on all
gears for smoother shifting and a more positive shift feel as well as for improved durability.
For third / fourth
gear, there are now double cone
synchronizers on five - speed gearboxes and triple cones for six - speed units.
Transmission / Transaxle case and all internally lubricated parts including ring and pinion
gears, oil pump, cover,
gears, housing and vanes, torque converter, valve body (s), throttle valve, valve pack, governor,
gear and cover, parking
gear and valve, roll pins, sprags, sprockets, chain, springs, stator and shaft, pressure regulator valve; pressure switches, solenoids, banks, automatic transmission / transaxle, clutch, drums, pistons and steel plates, planetary and sun
gears, servos and rings, blockers,
synchronizer hubs and keys, bearings, bushings, supports and shafts; control rings; yoke; extension housing; speedometer, drive
gears; accumulators and rings, adjusters, shift cover and forks; separate bell housing.
Single cone carbon
synchronizers are used on 5th and 6th
gears for increased friction capability and reduced shift effort.
Additional features include a low friction design with single cone
synchronizers in all
gears and high capacity bearings throughout.
By employing multiple large - capacity
synchronizers (triple cones on 1st and 2nd
gears; double cones on 3rd and 4th
gears), the 6 - speed offers an exceptionally light effort.
Issues that are cover in a certified pre-owned vehicle include, transmission / transaxle case and all internally lubricated parts including ring and pinion
gears; oil pump, cover,
gears, housing and vanes; torque converter; valve body (s); throttle valve; valve pack; governor,
gear and cover; parking
gear and pawl; roll pins; sprags; sprockets; chain; springs; stator and shaft; pressure regulator valve; pressure switches; solenoids; bands; automatic transmission / transaxle clutch, drums, pistons and steel plates; planetary and sun
gears; servos and rings; blockers;
synchronizer hubs and keys; bearings; blessings; supports and shafts; control rings; yoke; extension housing; speedometer drive
gears; accumulators and rings; adjusters; all internal fasteners, nuts and bolts; shift cover and forks; separate bell housing; transfer case and all internal parts contained within the transfer case; seals and gaskets.
In 1st and 2nd
gear the transmission uses a triple - cone
synchronizer, resulting in comfortable operability and good shift feel.
The Integra Type R features the world's first transmission in the 2.0 - liter class to use multiple synchronizing cones for all
gears, including a triple - cone
synchronizer in 1st and 2nd
gears and a double - cone
synchronizer in 3rd through 6th
gears, resulting in lighter, faster shifting.
When the driver wants to shift
gear, the shifting sleeve with
synchronizer unit is moved along the shifting rod from second
gear through neutral to third
gear.
The transmission's shift linkage operates smoothly, with minimal effort, thanks to the use of shortened
synchronizer sleeves and a redesigned reverse -
gear mechanism.
The GKN All - Wheel Drive System includes a GKN power transfer unit (PTU), linked to the transmission's final drive differential, containing a
synchronizer and brake to disconnect the all - wheel drive system upstream of the PTU hypoid
gears.
It is based on the CLA's optional dual clutch unit but gets reinforced
gear cogs and
synchronizer rings with carbon fiber friction rings for added durability.
The portfolio of products includes manual transmissions, dual clutch transmissions, hybrid and EV powertrains,
gears, shafts, clutches,
synchronizers, mechatronic systems, transmission control units, and control software.
Triple - cone
synchronizers for first, second and third
gears and a double - cone
synchronizer for fourth
gear optimize the amount of strength required to make shifts and establish the right balance between a short, responsive stroke and pleasing feel to gearshift operation.
All internally lubricated parts including: main shaft, counter shaft, all
gears, input shaft, hub assemblies,
synchronizers, shift rails, shift fork, and internal transmission bearings.