Daewoo Nexia Gearbox
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The Daewoo Nexia Gearbox
Just like that of a manual gearbox, the automatic gearbox’s primary job is to allow the engine to operate in its narrow range of speeds while providing a wide range of output speeds.
Without a gearbox, cars would be limited to one gear ratio, and that ratio would have to be selected to allow the car to travel at the desired top speed. If you wanted a top speed of 80 mph, then the gear ratio would be similar to third gear in most manual gearbox cars. You’ve probably never tried driving a manual gearbox car using only third gear. If you did, you’d quickly find out that you had almost no acceleration when starting out, and at high speeds, the engine would be screaming along near the red-line. A car like this would wear out very quickly and would be nearly undriveable.
The key difference between a manual and an automatic gearbox is that the manual gearbox locks and unlocks different sets of gears to the output shaft to achieve the various gear ratios, while in an automatic gearbox; the same set of gears produces all of the different gear ratios. The planetary gear set is the device that makes this possible in an automatic gearbox.
The modern gearbox is by far, the most complicated mechanical component in today’s automobile. Newer gearboxes contain mechanical systems, hydraulic systems, electrical systems and computer controls, all working together in perfect harmony which goes virtually unnoticed until there is a problem.
On a rear wheel drive car, power flow on a rear wheel drive the gearbox is usually mounted to the back of the engine and is located under the hump in the centre of the floorboard alongside the gas pedal position. A drive shaft connects the rear of the gearbox to the final drive which is located in the rear axle and is used to send power to the rear wheels. Power flow on this system is simple and straight forward going from the engine, through the torque converter, then through the gearbox and drive shaft until it reaches the final drive where it is split and sent to the two rear wheels.
Nexia Gearbox fluid should be changed periodically. Your owner’s manual should give you the recommended intervals which could be anywhere from 15,000 miles to 100,000 miles. Most gearbox experts recommend changing the fluid and filter every 25,000 miles.
Few gearboxes have drain plugs to drain the old fluid. In order to get the fluid out, the technician removes the gearbox oil pan. This is quite a messy job and generally not recommended for the casual do-it-yourselfer. Even if the gearbox has a drain plug, the only way to also change the gearbox filter is to remove the pan. When the pan is down, the technician can check for metal shavings and other debris which are indicators of impending gearbox problems.
In most cases during these gearboxes services, only about half the oil is able to be removed from the unit. This is because much of the oil is in the torque converter and cooler lines and cannot be drained without major disassembly. The fluid change intervals are based on the fact that some old fluid remains in the system.
When the Nexia gearboxes is serviced, make sure that the correct fluid is used to re-fill it. Each gearbox manufacturer has their own recommendation for the proper fluid to use and the internal components are designed for that specific formula. GM usually uses Dexron, Fords prior to 1983 use Type F while later models use Mercon. Late model Chrysler products use ATF +3 +4 (Not using the correct fluid for Nexia gearboxes is the most common reason for their gearbox problems.) Toyota sometimes uses Type T which is only available through Toyota and Lexus Parts departments. Honda also specs out their own formula which is available from Honda or Acura parts departments. A gearbox will not work properly or may even slip or shudder with the incorrect fluid, so make sure that you double check. Your owner’s manual will tell you which fluid is required. Naturally, the owner’s manual will try to convince you to only use the manufacturer’s branded fluid, but they will also provide you with the specs for the oil. If the aftermarket product indicates on its container that they meet or exceed the specs for a particular type of gearbox fluid, it is generally ok to use that product.
Why use us for a Nexia Gearbox
We are the gearbox specialists, it’s all we do, and we do it well and we are the best at offering any make or model of gearboxes.
All our automatic and manual gearboxes are available new, second-hand and remanufactured or reconditioned to the highest standards. All our gearbox components meet or exceed all original manufactures specifications, and most of the time the Daewoo Nexia Gearbox components are sourced from our specialist breakers. You can buy with confidence from us, knowing that you have the best quality Daewoo Nexia Gearbox with the best warranty protection. We have an extensive network of industry contacts to ensure you find what you are looking for.