Manual Transmissions

Question 1

What are the two types of manual transmissions?

Answer 1

Constant mesh

Synchromesh

Question 2

The constant mesh trans has?

Answer 2

2 parallel shafts where all forward gears are constantly meshed with main shaft but able to free spin

Question 3

How does a Synchromesh trans prevent grinding

Answer 3

grinding is prevented by synchronizing speed before engagement

Question 4

A synchronizer slide on:

Answer 4

The splines of the main shaft

Question 5

Reverse gear is engaged when:

Answer 5

Countershaft gear engages reverse idler gear which engages main shaft

Question 6

In high trans gear:

Answer 6

A Large counter shaft gear turns small main gear allowing more speed

Question 7

In low trans gear:

Answer 7

A small gear on the countershaft drives a large gear on the output shaft for acceleration

Question 8

Main shaft in a transmission is also known as the?

Answer 8

Output shaft

Question 9

The input shaft:

Answer 9

Takes power from the clutch into the transmission

Question 10

A pulsating clutch pedal is caused by?

Answer 10

Wobble or vibration of rotating parts

Question 11

Noise on clutch disengagement is caused by

Answer 11

A worn clutch release bearing

Question 12

Clutch noise on initial engagement is caused by

Answer 12

Worn parts in the clutch

Question 13

Clutch scraping, clunking, or squealing is caused by

Answer 13

Worn or un-lubricated parts

Question 14

A dragging clutch is cause by

Answer 14

The clutch not fully released or warped disks

Question 15

A dragging transmission will cause

Answer 15

The trans or trans axle to grind

Question 16

A grabbing clutch is cause by

Answer 16

Glazed clutch packs

Worn or loose trans or engine mounts

Question 17

A grabbing or chattering clutch will

Answer 17

Produce vibration or jerking under acceleration

Question 18

What can cause clutch slippage?

Answer 18

Broken motor mounts

Question 19

Clutch slippage is

Answer 19

Engine speed rises vehicle speed slowly rises

Question 20

When a clutch engages it locks together the:

Answer 20

Flywheel, clutch, and trans input shaft

Question 21

The pilot bearing is pressed into the engine crank shaft to support:

Answer 21

Transmissions input shaft

Question 22

A grinding, growling, or humming trans is cause by:

Answer 22

Worn, chipped, or cracked gears

Question 23

A thumping or knocking in a transmission is caused by:

Answer 23

Bearing wear (beard at low shaft speed)

Bumps, cracks, or swells on the gear

Question 24

Manual transmission rattle is caused by

Answer 24

-engine vibration on vehicles that have no vibration dampeners on clutch

• cylinder misfire

-excessive backlash on PTO gears

Question 25

Transmission whining is caused by:

Answer 25

-Insufficient backlash of gears
- mismatch gear sets
- pinched bearings

Question 26

Noise while in neutral is caused by:

Answer 26

-trans misalignment
- worn bearings
- excessive backlash
- gear tooth condition
- improper lubrication

Question 27

Clutch Noise while in gear is caused by:

Answer 27

-Main shaft bearing
- gear issues

Question 28

Difficulty to shift is caused by:

Answer 28

• bent or worn shift linkage
• in-lubed linkage
• binding of shift forks
• misaligned trans case
• clutch issues

Question 29

Jumping out of gear is caused by

Answer 29

-worn shift linkage or shifter arm
- worn clutch pilot bearing
- worn synchronizers, shifting forks, and shafts

Question 30

Locking in gear is caused by

Answer 30

-Worn linkage
- broken gear teeth

Question 31

What component engages the clutch to the fly wheel

Answer 31

Pressure plate

Question 32

What are the two types of pressure plates

Answer 32

-Coil spring
- diaphragm