It really depends on how old and worn out they are. If the damage is extensive, you may want to consider purchasing a new one.
Gearboxes get hot because of the long usage. It can be hot may be because of the oil used in it.
metals and rubber
Bevel gears are commonly used in devices such as gearboxes, differential gears in vehicles, hand drills, printing presses, and locomotives. They are also used in industrial equipment such as mixers and conveyor systems.
Torque sensors are used in vehicles and aircraft. They are used on engines, gearboxes, crankshafts and transmissions to measure the amount of torque being generated.
series 3 gearboxes have synchromesh on 1st and 2nd Addendum: Synchromesh meaning you don't have to double-clutch them like the earlier gearboxes. they are also a stronger transmission.
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There are several types of gearboxes and each is specialized for certain applications. Some of the configurations are helical, bevel, spur, worm, and planetary.
if it is spring no electric yes
spur gears are used because there are many things such as bicycles that cant exist without a spur gear' > gearboxes, mechanical watches, cam drives
yes they are my friend indulge
No. It is slang and should not be used in formal English
Automatic and Manual gearboxes are essentially the same, except that the driver does the shifting for a manual gearbox(my personal preference), and a computer shifts for an automatic gearbox.