Daewoo Gearbox: Lacetti car gearboxes, Nubira and Leganza
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Find helpful info on Daewoo Gearbox Models here:
Daewoo Kalos Gearbox
Daewoo Lacetti Gearbox
Daewoo Leganza Gearbox
Daewoo Matiz Gearbox
Daewoo Nexia Gearbox
The 4HP14 is a 4-speed automatic
transmission for passenger cars from ZF Friedrichshafen AG. Introduced in 1987 and
produced through 2001, it was used in Daewoo front wheel drive cars.
About Automatic Transmissions / Gearboxes
Daewoo's automatic transmission
is an automobile gearbox that can change gear ratios automatically as the vehicle
moves, thus freeing the driver from having to shift gears manually. (Similar but
larger devices are also used for railroad locomotives.)
Automatic transmissions, particularly earlier ones, reduce fuel efficiency and power.
Where fuel is expensive and, thus, engines generally smaller, these penalties are
more burdensome. In recent years, automatic transmissions have significantly improved
in their ability to support high fuel efficiency but manual transmissions are still
generally more efficient. (This balance may finally shift with the introduction
of practical continuously variable transmissions). Most automatic transmissions
have a set selection of possible gear ranges, often with a parking pawl feature
that will lock the output shaft of the transmission.
However, some simple machines with limited speed ranges and/or fixed engine speeds
only use a torque converter to provide a variable gearing of the engine to the wheels.
Recently manufacturers have begun to make continuously variable transmissions commonly
available. These designs can change the ratios over a range rather than between
set gear ratios. Even though CVTs have been used for decades in a few vehicles,
the technology has recently gained greater acceptance among manufacturers and customers.
Automatic transmission modes
In order to select the mode,
the driver must move a gear shift lever which can be located on the steering column
or on the floor next to the driver. In order to select gears / modes the driver
must push a button in (called the shift lock button) or pull the handle (only on
column mounted shifters) out. Vehicles conforming to US Government standards must
have the modes ordered P-R-N-D-L (left to right, top to bottom, or clockwise).
have various modes depending on the model and make of the transmission. Some of
the common modes are:
Park (P) – This selection mechanically locks the transmission, restricting
the car from moving in any direction. A pin prevents the transmission from moving
forward (although wheels, depending on the drive train, can still spin freely),
it is recommended to use the hand brake (or emergency brake) because this actually
locks the wheels and prevents them from moving, and increases the life of the transmission
and the park mechanism. A car should be allowed to come to a complete stop before
setting transmission into park to prevent damage. Park is one of only two selections
in which the car can be started. In some cars (notably those sold in the US), the
driver must have the footbrake depressed before the transmission can be taken out
Reverse (R) – This puts the car into the reverse gear, giving the
ability for the car to drive backwards. In order for the driver to select reverse
they must come to a complete stop, and push the shift lock button in and select
reverse. Not coming to a complete stop can cause severe damage to the transmission.
Many modern automatic gearboxes have a safety mechanism in place, which does to
some extent prevent (but doesn't completely avoid) inadvertently putting the car
in reverse when the vehicle is moving. This mechanism usually consists of a moveable
physical barrier on either side of the Reverse position, and is electronically linked
to the brake pedal, which needs to be pressed in order to allow putting the car
Neutral/No gear (N)– This disconnects the transmission from the wheels so the car
can move freely under its own weight. This is the only other selection in which
the car can be started.
Drive (D) – This allows the car to move forward and accelerate
through a range of gears. The number of gears a transmission has depends on the
model, but they can commonly range from 3, 4 (the most common), 5, 6, 7 and 8 in
the new models. Some cars when put into D will automatically lock the doors or turn
on the Daytime Running Lamps.
As well as the above
modes, there are also other modes dependant on the manufacturer and model. Some
D4 – is used commonly for highway use and uses all 4 forward gears.
D3 – only uses the first 3 gears and according to the manual it
is used for stop & go traffic such as city driving.
+ − and M – This is the manual selection of gears for automatics.
The driver can shift up and down at their will, like in a semi-automatic transmission.
OverDrive ([D], OD, or a boxed D) - This mode is used in some transmissions
(including late 1980s Chevrolet) to allow early Computer Controlled Transmissions
to engage the Automatic Overdrive; in these transmissions, Drive (D) locks the Automatic
Overdrive off, but is identical otherwise. OD in these cars engaged under steady
speeds or low acceleration at 45mph; it would automatically come on at 65 under
Second (2 or S) – This mode limits the transmission to the first
two gears, or more commonly locks the transmission in second gear. This can be used
to drive in adverse conditions such as snow and
ice, as well as climbing or going down
hills in the winter time.
First (1 or L) – This mode locks the transmission in first gear
only. It will not accelerate through any gear range. This, like second, can be used
during the winter season, or towing.
are found in other vehicles such as Ford, Porsche, VW, Citroën, Peugeot
and Honda etc, but the Daewoo models include 1996–1997 Daewoo Nubira 1.5, 1996–1997
Daewoo Nubira 1.8, 1996–1997 Daewoo Leganza 1.8, 1996–1997 Daewoo Leganza and more.