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Basic fluid change
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The purpose in posting this note is to encourage anyone with an A650E to change the fluid and filter if they think it's time. No need to pay someone else to do a half-hearted job! It's a simple, uncrowded, easy to maintain trans design, and if you can change your oil, you can do this (in my opinion).
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After getting a new filter gasket and Fluid from your local Lexus dealer you are all set.
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Watch out when you pull the pan, don't damage the sealing surface prying the pan off (do it gently and you'll be OK, it'll sort of jump loose all the sudden). You will want to leave a few bolts in the pan I suject loosening all but 3 or 4 and removing them then start to loosen the rest. When the pan is free it makes it much eaiser to guide the fluid into you oil pan. When you have the pan removed clean the pan and case gasket surfaces thoroughly and gently so as not to gouge the aluminum of the case...a wire brush works OK on the pan itself now replace your filter. Don't forget to put in the new filter in!! Clean the old residue out of the pan, and clean the magnetic residue off the ring magnet in the pan.Watch out for the constant dripping from the case, try to keep the mating surfaces clean when you put the pan back on, it'll help the Gasket seal better.
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You will also want to inspect your pan when cleaning it for how the tranny is doing. Looks for things like large chunks of metal / Brass shavings both signs of Bushings starting to wear and planatery’s starting to fail.
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A more complete method of a Basic fluid change
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While it's much better for the transmission to change the fluid using the method in [the above] article than it is not to change the fluid at all, this method only replaces about half of the fluid in the transmission. The best thing to do is to change out ALL of the fluid, and this is also something a person can do themselves.
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First, drain the fluid from the pan, just like you would using the above procedure. Once you've replaced the filter, the pan gasket, and reinstalled the pan, you're ready for the next step.
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Fill the transmission to the proper level using the proper type of transmission fluid. Then disconnect the return transmission line (the line in which transmission fluid flows from the transmission cooler back to the transmission), located near the bottom of the radiator. There's two transmission lines connected in this location. Once the line has been disconnected, attach a clear piece of tubing to the transmission cooler, the same diameter as the transmission line, approximately 5-6 feet long, using the transmission line clamp to secure it.
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Place the unattached end of the clear tube in a plastic, one gallon milk container and place it where it can be seen (like not under the car).
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For the next portion of the procedure, make sure that the parking brake is set prior to continuing. Start the engine. The transmission may have to be put into "Neutral" or "Drive" in order to pump the fluid from the transmission. I usually put mine in "Neutral" to accomplish this step. While the transmission is pumping out fluid, you can monitor approximately how much fluid has been pumped out by looking at how much fluid has been pumped into the plastic milk jug. While fluid is being pumped out, slowly add new fluid to the transmission at about the same rate as its being pumped out. This keeps the fluid level at, or near the proper level. You can see the condition of the fluid through the clear tubing as its being pumped out.
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After approximately 4 to 5 quarts (obviously, if it's more than 4 quarts, you'll have to turn of the engine, and fetch another milk jug) of fluid have been pumped out, you should notice a change in the color of the fluid. It should go from a brownish red color, to a bright pinkish red color. When this happens, all of the old fluid has been replaced with new fluid.
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Be careful not to overfill the tranny during this procedure.
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When completed, reconnect the transmission return line to the transmission cooler. Check the fluid level as you normally would, and add fluid as required.
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This fluid change method is twice as good for your transmission as the method of only changing out half of the fluid is. Happy shifting!
 
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