When is the trans service due??? Was thinking about it today while it's slow at work. Car is at 44k miles
From what I understand, the diesel trans has a lifetime fill, but having said that, you might want to check this out: HOW TO: Service "Lifetime Fill" Tranmission fluid for Diesel AW AF-40-6 TransmissionWhen is the trans service due??? Was thinking about it today while it's slow at work. Car is at 44k miles
I think the prevailing theory on this (some will disagree) is that when a flushing machine is used, it may have residual of some incorrect fluid that might get in there and possibly screw things up. I am not sure of other implications. That being said, I think at least one member here did have a flush done, but I don't think they ever posted long term results, and I can't remember who it was.I've seen the drain and refill write up, but would it be ok to just do a complete flush on these transmissions?
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Yes, you could disconnect the cooler lines and turn the engine on and off carefully keeping that what you pump out and add back inI've seen the drain and refill write up, but would it be ok to just do a complete flush on these transmissions?
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I believe it's the other way around; if you just do a drain and refill, you guarantee you'll leave a great deal of the old fluid still in the transmission. Modern flush techniques do not use solvents and simply allow the transmission's internal pump to cycle out fluid while a machine re-fills at an identical rate through the transmission cooler lines. It is 100% safe, and the best way you can service a transmission since it replaces all of the fluid instead of just some.I think the prevailing theory on this (some will disagree) is that when a flushing machine is used, it may have residual of some incorrect fluid that might get in there and possibly screw things up. I am not sure of other implications. That being said, I think at least one member here did have a flush done, but I don't think they ever posted long term results, and I can't remember who it was.
The OEM fluid turns dark prematurely due to corrosion inhibitors left in the transmission and clutch material from the break-in process. I don't think the transmission fluid actually burns. I wouldn't be too concerned about the old stuff, but it's definitely a good idea.I had the dealer do the flush to replace the OEM with amsoil. I can't locate the service order right now and I don't remember how much they charged me. I had mine done right before 45K, I was under the impression that was the 1st service interval. The dealer did tell me that the old fluid did look a little, well, bad. I believe the general consensus is that the OEM tranny fluid is junk. I now have about 65K on the car, so far, so good. I'm considering a single drain and fill in about another 5K just to keep up on things, "freshen up" the fluid so to speak. I can't say for certain that the amsoil fluid improved anything as things were good to begin with and I haven't really noticed any difference - shifting and all is just as good as it always was. But I do feel better having a better quality fluid in there.
I'm very happy with the Amsoil transmission fluid in my car.Specific to the diesel, AMSOIL makes one of the better options as it is priced at about half the cost of the OEM fluid and lasts much longer. It has been tried and proven in this transmission. If anyone is interested, please shoot me a PM and I can get you a quote, and can possibly get you wholeseale pricing on it. If you'd like to shop on your own, here's the fluid people are using, which meets Aisin AW-1 specifications:
AMSOIL Signature Series Fuel-Efficient Synthetic Automatic Transmission Fluid
If you are purchasing enough for 3 drains and refills (9 quarts), a 6-month preferred customer account will save you some money:
If anyone has any questions about this transmission fluid or the AMSOIL preferred customer account, let me know.
I just did this same thing about 2 months ago after discovering at 37,000 miles my trans cooler lines were leaking, ( NOT COVERED PAST 36k ) Fluid was extreemly filthy. I used the Amsoil Signature also.I flowed the "How To" guide as posted above and changed out my own transmission fluid with the proper AmsOil ATF at 36,000mi and my OEM ATF was already getting a bit dark. It seemed to improve my shift response and firmness slightly.
If you are willing to do this yourself I would avoid the flush, if you follow the "how to" it does about as good of a job as a flush anyways. Even with a flush you never get 100% of the old stuff out before refilling. There is always some old stuff left.
When I did mine, I drained and filled the ~3 qts. of ATF 3 times. The first time it was still fairly dirty, the second time it was still a bit dirty looking, and by the third it looked like I was dumping out a new fluid. So, it worked well.