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• 416.

  How many quarts transmission fluid change?

  The amount of transmission fluid required to change depends on the specific make and model of the vehicle and the type of transmission. It is recommended to consult your vehicle's owner's manual or contact the manufacturer to determine the correct amount of transmission fluid for your specific vehicle. Typically, a transmission fluid change can take anywhere from 4 to 16 quarts, but your specifics may vary.
• 417.

  Why check transmission fluid when engine is running?

  It is important to check the transmission fluid while the engine is running for the following reasons:
  ① Accurate liquid level measurement:
  The transmission fluid level should be checked when the fluid is at operating temperature. Run the engine to allow the transmission fluid to reach the proper temperature so an accurate measurement can be taken.
  ② Proper liquid circulation:
  When the engine is running, the transmission pump kicks in, circulating fluid through the transmission system. This ensures fluid distribution to all components of the transmission, providing a more accurate reading of actual fluid level.
  ③ Engaged transmission components:
  When the engine is running, the transmission is engaged and various components such as the torque converter and clutch work. Checking fluid levels under these conditions provides a more realistic representation of fluid requirements during normal operation.
  ④ Dynamic pressure conditions:
  Running the engine allows you to evaluate the dynamic pressure conditions within the transmission. This is especially important with automatic transmissions, as fluid pressure plays a vital role in proper shifting and overall performance.
  
• 418.

  What happens if you start a car with low transmission fluid?

  Starting your car with low transmission fluid can have some negative consequences, as transmission fluid plays a vital role in the proper operation and protection of your transmission system. Here are some potential issues that may arise:
  ① Poor lubrication: Transmission oil acts as a lubricant for various moving parts in the transmission. If the fluid level is low, there may not be enough lubrication, causing increased friction and wear on transmission components.
  ② Overheating: Transmission oil can also help cool the transmission by dissipating the heat generated during operation. A low fluid level can cause insufficient cooling, which can lead to an increase in temperature. Excessive heat can accelerate component wear and cause premature transmission failure.
  ③ Gear slipping: Insufficient fluid levels can cause transmission to have difficulty properly engaging and disengaging gears. This can lead to gear slippage, delayed or rough shifts, and overall reduced drivability.
  ④ Increased friction and wear: Insufficient lubrication will lead to increased friction between moving parts, leading to accelerated wear and possible damage to the gearbox.
  ⑤ Potential Damage: Running low transmission fluid for extended periods can cause serious damage to internal components such as transmission clutches, belts, and gears. This can result in the need for extensive and expensive repairs.
  
• 419.

  Can transmission fluid get low without a leak?

  Transmission fluid levels usually don't drop significantly over time unless something goes wrong. Unlike engine oil, which may burn to some extent, transmission oil should remain at a relatively stable level. If you notice a low transmission fluid level with no obvious leaks, it could be a sign of an underlying problem. Here are some possibilities:
  ① Transmission Fluid Evaporation: While it's not common, transmission fluid can evaporate over time. This is a slow process, and the fluid level decrease is usually minimal. If you notice a significant drop in fluid level, evaporation is unlikely to be the sole cause.
  ② Internal problems within the transmission: Internal problems within the transmission, such as a faulty torque converter or failed seal, may cause a gradual loss of fluid. During normal transmission operation, fluid can be burned away.
  ③ Overheating: Overheating will cause the transmission oil to decompose and evaporate faster. If your transmission continues to heat up, it may cause the fluid level to drop.
  ④ Incorrect fluid level check: It is very important to accurately check the transmission fluid level. If the vehicle is driven on uneven ground or the engine is not running when the inspection is performed, it may not provide accurate readings.
  If you notice a sudden or significant drop in transmission fluid, but no obvious leak, it is crucial to have your vehicle inspected by a qualified mechanic.
  
• 420.

  Does transmission fluid circulate in park?

  In a typical automatic transmission system, transmission fluid does not circulate when the vehicle is parked. When the transmission is in park, the transmission's internal components are disconnected from the engine, and the transmission fluid pump typically does not actively circulate fluid. The park position is designed to prevent the vehicle from moving, and the transmission is essentially locked in place.

  
  

  However, some modern vehicles with advanced transmission designs may handle fluid circulation and torque converter engagement differently under certain circumstances (even while parked). It is always recommended that you refer to the specific information provided in your vehicle's owner's manual or consult the manufacturer for accurate details on your specific vehicle's drivetrain.