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X3 E83 (2004 - 2010)
Talk about the E83 BMW X3 in this forum!

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  #1  
Old 08-17-2016, 12:29 PM
ncord ncord is offline
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Triad of Lights

Just got tri-ad of lites...BRAKE,ABS,& 4x4.Car ran fine until I tried reverse and then went into Limp Mode.Drove ok in forward gears. Is this the gear in the transfer case that people talk about? Can I rotate it for now until I can get a new gear??? Thanks .
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  #2  
Old 08-17-2016, 12:43 PM
Q4 Q4 is offline
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If it is the gear you can get one on Amazon for about $15. No reason to take it all apart just to rotate a damaged gear when you can get one that cheap.
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  #3  
Old 08-17-2016, 12:44 PM
Q4 Q4 is offline
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https://www.amazon.com/gp/aw/s/ref=i...efix=bmw+x3+tr
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  #4  
Old 08-17-2016, 01:56 PM
ncord ncord is offline
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I just ordered one from Amazon.ca..My problem is I only have one car so was going to rotate
gear till new one arrived. I hope this is the problem.
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  #5  
Old 08-17-2016, 02:32 PM
Q4 Q4 is offline
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Haha. That's your problem!

You need a second car to drive while you are working on the BMW.
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  #6  
Old 08-17-2016, 02:39 PM
BMWaufKS BMWaufKS is offline
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Question Do before it breaks?

At what mileage does it make sense to proactively replace this gear, assuming on-road commuting and not off-road use of the X3?
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Restoring a highly-optioned
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  #7  
Old 08-17-2016, 03:24 PM
ncord ncord is offline
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I`m at 118k miles .Mostly highway miles in good weather.Transfer case oil has been changed on a regular basis.I would say change it before 100k mi.
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  #8  
Old 08-17-2016, 03:55 PM
BMWaufKS BMWaufKS is offline
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I think mine's at around 86k, so I'll get the part on the shelf. Found it even cheaper (same part) on eBay.

In the great Youtube video of the guy doing his X5's gear he didn't clean the motor-to-transfer case mating surfaces, and I didn't see a gasket. Is there one? Or should a little gasket sealer be used after cleaning both surfaces?
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  #9  
Old 08-17-2016, 04:04 PM
swampX3 swampX3 is offline
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check your codes

might not be the transfer case actuator or gear ....check your codes for bad wheel speed sensor and other stuff like the abs pump

did you get the rat a tat tat noise when turning off the ignition that points straight at the t case actuator ?????


also ....there is no gasket between the actuator and the case .....just clean and grease smear to help the next inspector !

some of the plastic stuff sold on eBay is junky ....like window clips and 3rd party gears that do not hold up....do your homework

yes ....try rotating the gear first ....but ....check codes before diving in

report back on rat a tat tat ....best wishes
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  #10  
Old 08-17-2016, 04:08 PM
swampX3 swampX3 is offline
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post 769 ....the unplug try

http://www.bimmerfest.com/forums/sho...566880&page=31


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the things that go on when you unplug the transfer case actuator
The way you can test this, is to crawl under the car, and disconnect the electrical connector on the transfer case actuator.
The transfer case is behind the transmission and easy to get to. No ramps or jacking necessary.
There is only one connector on the transfer case, so you can't miss it. You may have to bend the thin heat shield out of the way to access it - I did.
Unplug it, then start the car.
You'll notice the ABS, BRAKE, and 4X4 light are all on - that's expected.
PLEASE NOTE: with the transfer case actuator disconnected, the anti-lock braking system is disabled, the dynamic stability control is disabled, and the all-wheel-drive is disabled (the car becomes 100% rear-wheel drive). Do this at your own risk, and drive carefully to avoid needing ABS or DSC.
Drive around for a few miles and see if the problem is still present, or if the "stutter" seems to have gone away.

If the stutter is not gone, you've ruled out the (extremely common) E83 transfer case slip failure, which is great.
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  #11  
Old 08-17-2016, 04:11 PM
swampX3 swampX3 is offline
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the clicking > rat a tat tat sound

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  #12  
Old 08-17-2016, 04:15 PM
Supercourse Supercourse is offline
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If you don't hear clicking sound beneath your seat on engine shutdown the actuator gear is not the problem.

There is no mileage at which that part should be changed proactively - some forum members have reported absolutely no noticeable wear on it after 150K miles.

No clear picture as to why some owners experience a worn gear and others don't, but I doubt it is as common as this forum or the internet implies.

Doesn't seem to affect Landrover owners with essentially the same actuator.

Not the sort of issue anyway that is going to leave you stranded (can easily unplug the actuator from underneath or in the cargo area to temporarily become RWD).

Always first suspect a battery issue or random voltage fluctuation unless the triad stays on persistently after a restart. Then if no clicking, proceed to eliminate various sensors as the cause.

As to a gasket for the actuator - it doesn't bolt onto where there is fluid so no gasket involved.
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  #13  
Old 08-18-2016, 04:22 AM
ncord ncord is offline
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If I disconnect the plug to the transfer case,will it do any harm to drive the car around town a bit until my gear arrives.I`m stranded and wanted to avoid renting a car if I can.
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  #14  
Old 08-18-2016, 04:32 AM
dukedkt442 dukedkt442 is offline
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Don't put thousands of miles on it, but a week shouldn't be a problem.
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  #15  
Old Yesterday, 03:16 AM
ncord ncord is offline
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Installed new gear and all the lites are gone.Took longer than expected to get servomotor out.My female torx sockets were too long so had to fight with a couple of bolts.Need short sockets for sure.I didn`t have a hoist so laying on my back under the car made for added time retrieving the right combination of tools.
Here`s hoping I`m trouble free for a while.I`ve spent most of the summer repairing this
buggy. Thanks for all your help.
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  #16  
Old Yesterday, 06:20 AM
swampX3 swampX3 is offline
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what was your old gear like ????

a good outcome ....also .....any news on the look of the old gear ????.....teeth all gone .....cracked ....we've had some cracked in several pieces
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  #17  
Old Yesterday, 12:56 PM
ncord ncord is offline
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Teeth worn off on one sideof the old gear.But I spoke to soon earlier. Drove about 20 mi.this AM and all was good.
Drove again just now and ABS,Brake & 4x4 lites came on,and then went off.This happened a few times and are now off.There is no noise coming from transfer case when I turn the car off.Car is ruuning good.What could be wrong now???
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  #18  
Old Yesterday, 01:03 PM
Q4 Q4 is offline
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Did you check for and clear out codes?
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