Rear end fluid
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I asked the same question regarding the differential years ago and the general consensus was to leave it alone if you didn't have any problems. Maybe opinions have changed since then. On most RWD cars and trucks you should change it every 60,000-90,000 miles depending on the manufactures recommendation.
For the transmission I would just do a drain and refill every 30,000 miles which most people don't do anyways. The transmissions on our cars are made by Aisin which is basically Toyota and they are very reliable and durable. On transmissions over 100,000 miles it is best to not do a flush or even open them up to change the filter. It can stir up a lot of impurities causing problems that you did not have to begin with. I would only open the transmission if you have a problem with it. If its fine just do a drain and refill like I already mentioned.
For the transmission I would just do a drain and refill every 30,000 miles which most people don't do anyways. The transmissions on our cars are made by Aisin which is basically Toyota and they are very reliable and durable. On transmissions over 100,000 miles it is best to not do a flush or even open them up to change the filter. It can stir up a lot of impurities causing problems that you did not have to begin with. I would only open the transmission if you have a problem with it. If its fine just do a drain and refill like I already mentioned.
Last edited by brickrunner; 01-26-2016 at 10:57 PM.
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