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Old 02-23-2015, 10:43 PM
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Originally Posted by UNLIMTD View Post
Anyone know if the Trans Temp can be read with ODBII? I am wondering if it is not showing any value because it is bad, or just not available through that method.
Nope generic OBD II scanner will not work.

You need BMW specific software that can read real time data. There's a thread here about replacing the temp sensor because the trans was going into trans failure mode.
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Old 02-24-2015, 01:49 PM
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Originally Posted by upallnight View Post
Nope generic OBD II scanner will not work.

You need BMW specific software that can read real time data. There's a thread here about replacing the temp sensor because the trans was going into trans failure mode.
Is the INPA NCS DIS package the only option? I don't find it easy to use, not intuitive to me. I use it so seldom I have to start at the beginning of the learning curve every time.
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Old 02-25-2015, 11:46 AM
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I have AutoEnginuity and it does read tranny temp through OBD.
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Old 02-25-2015, 12:38 PM
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FWIW - the original fluid is not red. Sort of dark gray to brown. Hard to know what is in there other than its red. A couple of fill and drain cycles may help with some fresh & known fluid. The cooler and torque converter holds ~3 quarts. You usually get ~6 quarts out when you drain it and drop the pan. (roughly 2/3 total fluid). Repeat twice and you are up to 8/9. The third time gets you to 26/27... I use Pentosin ATF1. 5-liter jugs are available for $50 or so. Be suspicious of shops offering to flush the transmission for you. It is unlikely they are throwing away 15 to 20 liters of good synthetic fluid in the flush (especially if they haven't priced in $200-$400 for fluid). Most likely to be some generic stuff unrelated to the ZF/BMW spec.

The selector switch (that crushed wire) is known to go bad over time. I wouldn't work too hard trying to fix an old one. The switch comes as an assembly and includes the hard plastic sleeve and the circular plastic connector you mentioned was loose.

The temperature sensor is an easy repair once you have the pan off - cheaper even than that selector switch.
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Old 02-25-2015, 08:00 PM
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The Lifeguard 5 fluid I got is kind of like honey, sort of golden, I still have 6 quarts :P.
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