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  #41  
Old 07-01-2011, 10:30 AM
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How would I go about finding out what's the real problem, I don't know if it's the the torque converter of something else, all I know is that the jerking and rear ended is driven me knots I had change the tran filter and oil, updated the tran program but the rear Ender is still there.....
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  #42  
Old 07-01-2011, 03:55 PM
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Very hard to know exactly what is wrong and not very usefull anyway. Unless you have low mileage, you want to rebuild the Torq Conv if you take the trans off. If the Torq conv. is the culprit you still want to do a cleanup and overhaul on the trans. If the torq conv is ok, then you know something is wrong in the trans but you still would want a refresh on the torq conv. So, it is 6 of one or half a dozen of the other, either way you need the work done.

Ofcourse I'd recommend to DIY as I have seen reports of X5 coming back from R&R at transmission shops and still having issues whereas the guys on here who DIY seem to come out ok..... (I did mine and am very happy) YMMV :-)
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  #43  
Old 07-01-2011, 06:04 PM
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If you have tried changing the fluid and filter, and updating the software, you have done all the easy stuff. There is no single cause of transmission shifting problems. People all want to find the silver bullet, but there simply isn't one. It could be in the torque converter, the valve body, the solenoids, the wiring harness with the temperature sensor, the electronics, etc. These are complex transmissions, and small issues can cause these sorts of problems.

If you can't live with it the next step is to have the transmission overhauled.
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  #44  
Old 07-02-2011, 12:05 AM
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Ok the simtems could be lot, so the best bet is to just, have the transmission overhauled.!!
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  #45  
Old 07-02-2011, 12:14 AM
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Have anyone completely had transmission overhauled, and did it fix the rear ended problems, I don't want to get this done just to have the some problem arose again, So have anyone had this done, which fix the problems
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  #46  
Old 07-02-2011, 01:21 AM
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i did
http://www.xoutpost.com/bmw-sav-foru...-1st-time.html

so far so good!! no more "trans fail safe" message, jerking(rear ended), slipping and whistling/whinning sound.
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  #47  
Old 07-02-2011, 11:06 AM
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That sounds great, I would like the same no problem ride for my x5 so basically what I need to change could you list them for me, I cannot do the work myself I don't have the tools or space for a job like that,
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  #48  
Old 07-02-2011, 01:12 PM
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Try a dealer diagnosis?

The only sure way to know what's wrong it to take it apart and examine in. But, the dealer's computer (or perhaps an independent shop with the right equipment), can potentially detect clutch slippage electronically, which might steer you to specific issues. In any case, you got a tranny problem which is likely going to require taking it out. Trust me, it won't get better on its own! Having looked into this myself, a $3K rebuild is likely your least expensive option.
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  #49  
Old 07-02-2011, 01:15 PM
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And thus far, Knock on wood, mine is still running 55K miles later.
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Old 07-02-2011, 01:19 PM
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Read the threads by Civdiv, RDM and mine.

I would recommend to get:
AT overhaul kit
Friction disk set
Valve body overhaul kit
Replace all bearings (at minimum output bearing and radial A/B)

Remanufacture the torq converter while the AT is out.
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2003 4.4i black ext./black int./black headliner (kid's runabout)
2014 535d X-drive, M package, silver/black interior

Sold but not forgotten:
2009 E70 35d, black ext./black int./black headliner (sold 2021)
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Other hardware:
2015 Cayenne S (wife's new DD and definitely wroooommmmm)
2016 Tundra 1794 edition crew cab, luxo hauler
2005 Tundra crew cab, weekend hauler. Sold after 150k very happy miles.
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