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Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 03-09-2013, 12:08 PM   #1
Lunatic
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Is it true?

I have always heard that bmw has sealed transmissions as in you dont change the oil or do anything to them because its a lifetime thing but recently on one of the threads here i saw someone mention changing the tranny oil on an e46....is this true?? What can you and what cant you do to an e46 tranny can you change the oil or gear ratios (i have a stick shift) im new and still learning about bimmers (i need knowledge/brains!!!) haha =D
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Old 03-09-2013, 02:23 PM   #2
lcoleman
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BMW brands their ATF as "lifetime," but changing it is the #1 thing you can do to prevent transmission failure.

Since you have a manual, definitely change it. I don't recall the service interval, but it won't hurt to do it. I like Redline. Search.

Changing gear ratio means swapping diffs.
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Old 03-09-2013, 04:07 PM   #3
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What kind of oil would be good for it i drive it hard i put bmw engine oil in it but i want to upgrade it so i wana do the same for the tranny
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Old 03-15-2013, 09:49 AM   #4
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You can change oil anywhere...engine,trans,diff,p/s,brakes etc...
Search ,search, search.

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Old 03-25-2013, 10:47 AM   #5
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I would never trust a word bmw says. It wouldn't be hard to believe that they may have a hidden motive in telling you not to change the fluids to a very expensive part to your car

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