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Old 12-02-2012, 10:26 AM   #1
Orchazum
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Smile tranny failure after 100k from fluid change ??

Hello my fellow e46r's got a question. Now I have seen many threads of transmission failure when changing out the fluids after 100k . I am currently at 117k and was told about 6 months or so ago ky tranny had good fluid in it. The question here is should I ? I don't want failure , current money troubles would make that car an ornament in my driveway if it did fail . Fluid still looks in good condition as of a few days ago.

Do i run the risk of failure upon changing fluids at current mileage or do i just leave it be ?
If left alone how long will it last ?

There is no slippage currently (knock on wood) no problems at all.
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Old 12-02-2012, 10:31 AM   #2
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Old 12-02-2012, 10:38 AM   #3
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This is a good question as I am contemplating tranny fluid change as well and I'm sitting on 112k...general consensus is to change it, so I'm leaning towards changing it...going to speak to some shops and of course bringing my own fluid
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Old 12-02-2012, 10:48 AM   #4
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If the fluid has been previously changed I won't know, car fax doesn't say a whole lot, hell I have a reman alternator not on there . If the fluid has been changed, what is the failure rate hmmm
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Old 12-02-2012, 10:55 AM   #5
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Originally Posted by Orchazum View Post
Hello my fellow e46r's got a question. Now I have seen many threads of transmission failure when changing out the fluids after 100k . I am currently at 117k and was told about 6 months or so ago ky tranny had good fluid in it. The question here is should I ? I don't want failure , current money troubles would make that car an ornament in my driveway if it did fail . Fluid still looks in good condition as of a few days ago.

Do i run the risk of failure upon changing fluids at current mileage or do i just leave it be ?
If left alone how long will it last ?

There is no slippage currently (knock on wood) no problems at all.
Hmmm, I would think that if the fluid change is done correctly with the right fluids, the chances of fluid-caused failure would be near zero. Any failure from that point on would be from non-fluid causes.
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Old 12-02-2012, 02:25 PM   #6
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Hmmm, I would think that if the fluid change is done correctly with the right fluids, the chances of fluid-caused failure would be near zero. Any failure from that point on would be from non-fluid causes.
This IS the correct answer!!

Guaranteed you will NOT have a fluid related failure from changing the fluid.

Usually people think they if they change the fluid on a high mileage transmission it will sort out problems they are currently having.

Only problem it is about 50-75k miles too late for new fluid to help matters!
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Old 12-02-2012, 11:00 AM   #7
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There must be 50 threads on this issue. Search! You won't get a definitive answer and will be taking a chance no matter what you do. I changed my fluids over 40k miles ago with no issues either before or after the change.
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Old 12-02-2012, 11:30 AM   #8
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Fluid still looks in good condition as of a few days ago.
Out of curiosity, how did you check the transmission fluid?
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Old 12-02-2012, 01:45 PM   #9
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http://forum.e46fanatics.com/showthread.php?t=438667

the answer i wanted.
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Old 12-02-2012, 01:50 PM   #10
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new fluid does not ruin a tranny, neglect, improper use and flushing ruin a tranny
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Old 12-03-2012, 07:53 AM   #11
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new fluid does not ruin a tranny, neglect, improper use and flushing ruin a tranny
IMHO, you are on the money with this statement. A good local euro shop in Nashville and my friend, who is an ASE master tech, both say do not flush any transmission after 100k miles.

Get the filter kit, good fluid and do the conventional fluid change. You will not be doing anything harmful. I will change mine, plus the differential, brake and power steering fluids, during the Christmas holidays.
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Old 12-02-2012, 02:26 PM   #12
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you won't.
I did it on many of my cars and never had a problem
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Old 12-02-2012, 02:45 PM   #13
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Slush or stick?
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Old 12-02-2012, 03:17 PM   #14
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Slush or stick?
slush is assumed, as when a manual fails it's usually the clutch, throw out etc
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Old 12-02-2012, 03:42 PM   #15
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Decision made. To change.

It is a slush driven as a stick all the time though. Just couldnt find a 330 without it being beat to death with a stick.

If it ever fails 6 speed swap def. It would cost around the same if i did it myself vs shop putting in a new AT
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Old 12-02-2012, 04:32 PM   #16
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Be sure to change the filter too!!!
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Old 12-02-2012, 04:56 PM   #17
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Here is my 2 cents, if you are one of those types of fellahs who is easy on their car, meaning that you roll onto the accelerator nice and easy all the time and you don't spin up the motor to redline 20 times a day, changing the ATF might be okay, but, if you're in the crowd that treats the accelerator like a light switch each and every time your foot hits the accelerator, and you spin it up to redline 100 times a day, then reconsider the flush. The harder one leans on the car, the clutch packs work harder and thus experience more wear. The abrasive clutch pack particles get carried away by the ATF and accumulates making life even harder on the clutch packs. If the clutch packs are too worn, the worn clutch pack will now rely on the abrasive clutch pack particles floating around in the ATF to help it grab so to speak. Now if one pressure flushes out all the abrasive filled ATF with new "slippery" ATF, the worn clutch packs will slip even more thereby shortening their life sooner; at some point, the clutch pack will fail to hold, and as an added bonus, in this degradation process, the temperature will rise in the box, the ATF gets cooked/burned and itself becomes a less effective lube. It's a wicked circle. So again, if your driving style/habit is of an easy nature, you might just be okay, but if you beat your sled, perhaps letting a sleeping dog lie, as the saying goes, is a better choice.

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Old 12-02-2012, 05:07 PM   #18
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Oh a filter change is certainly on that list. I feel it would be like changing the oil without changing the filter

I drive my car normally , I like to get on her at least once a week though . Most of the miles on my car are highway though. Out of the 40k I did last year. 60 % is highway.
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Old 12-02-2012, 06:24 PM   #19
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I just changed the filter, fluid, and diff oil in my automatic at 136k, there was a world of difference in shifting afterwards.
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Old 12-02-2012, 06:50 PM   #20
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I just changed the filter, fluid, and diff oil in my automatic at 136k, there was a world of difference in shifting afterwards.

+1

Fluid friction and lube properties break down with heat over time.

Fluid change is good!
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