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  #21  
Old 09-26-2014, 02:00 PM
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Guys, an autologic diagnosis of my abs/brake/dsc 'trifecta' pointed to the transfer case. I haven't yet noticed the tell-tale click, but will check for it and am getting a second opinion [hopefully via DIS] on the cause. Assuming the trifecta cause is not an ABS sending unit at a wheel, given all the info on this 'fault,' I'm tempted to replace the gear in the actuator motor and get the ABS module inspected/rebuilt for $99. I view it almost as preventive steps, a reasonable investment at less than $150 for the parts and ABS module service if you DIY. No way I want spend $3k+ to replace the transfer case, the first shop's 'solution.' Any additional thoughts/guidance?
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  #22  
Old 09-26-2014, 02:10 PM
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Just sent you PM. If anything the gear in the transfer case needs to be flipped, or replaced. SlickGT1 flipped his and I believe got at least 2 more years of service out of it.

The Bosch 8.0 shouldn't need a rebuild, but it wouldn't hurt. If it were me, I'd swap the gear in the transfer case around (free), see if that makes the trifecta go away. If it remains, then look into the ABS module repair.

If the gear is worn, you should be hearing an audible click 1-2 seconds after shutting the X5 down.

http://johnnyvest.hubpages.com/hub/B...roblem-And-Fix

Slicks reference to flipping the gear below:
http://www.xoutpost.com/bmw-sav-foru...or-gear-2.html
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  #23  
Old 09-26-2014, 02:45 PM
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I'll second SlickGT1 repair. More than a year ago, I did mine. I have done about 15,000 kilometers since then, last July alone, we did about 6,500 km. As it was said, the gear gets worn only on about 30% of its circumference, so no need to replace it.
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  #24  
Old 09-29-2014, 11:59 AM
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I am still on the flipped gear.
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  #25  
Old 11-27-2016, 11:22 PM
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Here's the complete DIY video guide on the replacement:

https://www.youtube.com/watch?v=UR7Vv5SQvDc
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  #26  
Old 11-27-2016, 11:36 PM
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I'm still on the flipped gear. Lol. Years now, no isses. Free fix.
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  #27  
Old 02-06-2017, 04:57 AM
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I've just done this replacement on my X5. Here are two things I noticed from my experience.

1. If you have the three warnings lights on your dash (ABS, Brake and 4x4) you won't hear the motor gear clicking under your car as it disables the unit until errors are removed. My gear must have been slipping to begin as occasionally all the error lights vanished and I could hear the clicking of the gear again.

2. Prying open the the case to access the gear can be difficult and you need to use WD40 to help pry open the case.

3. Make sure you clear all the old grease/gunk out of the case before installing the new gear. Also, replace the grease with some new product and ensure it is applied to the long gear and the gear you are replacing.

4. If you can feel a slight lag or movement of power from front to rear on acceleration, replacing this gear may solve your issue. Just before it failed I had this issue, after the replacement of the gear the issue was gone. I'm assuming the gear was slipping and the car was unable to engage the clutch inside the transfer case quick enough.

5. I had wear on both the top and bottom side of the gear, I would suggest replacing the whole gear rather than simply flipping it over.

6. The sensor that you remove before you unbolt the motor from the transfer case has a lip and it sits along side the dip in the motor and locks in place as you tighten the nut (I struggled to figure out where it went as I had low light under the car during this procedure).

Hope these tips help.
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  #28  
Old 09-12-2020, 01:37 PM
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Wrote a little write up here with photos/ step by step guide for accessing the gear. In my opinion if you're going through the trouble to remove the actuator and get to the gear, may as well replace it. It is cheap enough.

https://bimmerzeit.com/2020/09/04/x3...placement-diy/
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  #29  
Old 09-19-2020, 11:59 AM
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Quote:
Originally Posted by richardb View Post
Wrote a little write up here with photos/ step by step guide for accessing the gear. In my opinion if you're going through the trouble to remove the actuator and get to the gear, may as well replace it. It is cheap enough.

https://bimmerzeit.com/2020/09/04/x3...placement-diy/
Good day folks,

today i removed the actuator motor to replace the gear that's known to wear out. Well, no smoking gun but i will replace it. However I did notice something unusual with the electric motor. I turned it and it has a "stepped" or "notched" rotation. Here's a brief video...
https://www.youtube.com/watch?v=ckFBz4-QF7Q

uncertain if this is a stepper motor. is this normal or is the motor kaput?

thnx for any input.
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