And it can even damage the aging rubber seals.īut, if you regularly maintain your car then flush is a better choice as it gets rid of almost all of the old transmission oil. That’s because flushing the transmission increases the chance of some gunk getting stuck in the narrow oil channels. So, what’s better for you?Īs a general rule, if you suspect that you haven’t maintained the transmission well in past, it’s better to just change the fluid and not bother with a flush. Flushing is done using a machine.įluid change means there will be some percentage of old fluid remaining in the gearbox unit (sometimes up to 50%) but flush ensures that every part of gearbox gets rid of old oil. Transmission oil flush means taking out old oil from the pan, cooler lines, and from the crevices of the transmission. The fluid change means draining the old fluid from the transmission pan and refilling with fresh fluid. When you want to change the transmission fluid, you have two choices- Complete flush or Fluid change. Car manufacturers usually do to comply with the environmental norms and to show that their cars are low maintenance.ĭual-Clutch Transmission Are Quick But Complex And Difficult To Fix Should you Flush or just Change the Transmission fluid? But, that’s not really your best choice if you do intend to keep the car for a long time. Several vehicles nowadays come with lifetime transmission fluid that the company says doesn’t need replacement. If you regularly do this that you won’t have to wonder if changing transmission oil next time will cause trouble. However, it’s best to change transmission oil at around every 50,000 miles (80,000 km). Many mechanics recommend Lucas transmission fix additive. What can you do in this case? Well, you can try using a transmission additive for preventing clutch slippage. If you have gone ahead, poured fresh oil and now your clutch is slipping.
The problem arises when a fresh trans fluid is added to the worn out transmission- The clutch might start slipping or the car might refuse to shift out of gear. Sometimes this extra friction from the old oil is what keeps the clutch working properly.
As the oil gets old, it becomes thicker and becomes less slippery. Transmission oil is really thin so that it can move around the crevices of the automatic transmission. But a lot can go wrong if you change the transmission oil of a high mileage engine. If no problems crop up after oil change, then congratulations you have increased the life of your transmission. You might take chances with transmission oil change but don’t flush the system. While Flushing the transmission with a machine can damage aging seals, which can cause leakage and hydraulic problems. This can wash away varnish from the clutch pack, causing clutch slippage. But, if your car is a high mileage vehicle (think 94k miles or 150,000 km), and is still running on factory-filled transmission oil, you are better off just leaving it alone.įresh transmission fluid has good cleaning properties. So what does he recommends? I learned from this that it’s crucial to change the transmission fluid periodically.
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