[Solved] 2006 BMW 330XI noise diagnosis

bmwsucks2 · 11-03-2015, 08:00 AM

Brought my 2006 BMW 330XI to BMW Dealer.

== Cause ==
"Found internal fault for transfercase. ", Dealer's report suggests "replace transfercase and mount" then "reprogram vehicle DSC".

I don't know how BMW technician checked my car... Probably they just scan the codes and cleaned my wheels... Shinny!

== Question ==

Could it be just "transfer case actuator" instead of the whole transfer case? How to diagnose?

Or, In general, How to proceed in such a case?

Thx!

========= Update =========
Last weekend, I did two things:
1) Flush the Diff oil.
2) Rotate tires from Rear to Front, Front to Rear; and inflate the tire pressure to specs (32 psi (F), 36 psi (R))

Noise was gone.

Should I dispute the BMW dealer's diagnosis charge which detects a "Transfer Case Internal Error" and suggests to replace the whole Transfer Case for $4000!??

TheBigYahi · 11-03-2015, 01:48 PM

Based on this DIY, I would say it's worth a shot: http://www.e90post.com/forums/showthread.php?t=633200

bmwsucks2 · 11-04-2015, 12:35 PM

TheBigYhi, thanks very much! This is definitely worth a shot. I will take the actuator off to take a look. I planned to replace the Tcase fluid anyway...

bmwsucks2 · 11-04-2015, 06:23 PM

TheBigYhi, a quick question, I read the DIY. But in my case, there's no any lights on, only grinding noise. It gets louder at 40 - 50 MPH. If tcase failed, should there be any lights on? Thx!

bmwsucks2 · 11-09-2015, 08:19 AM

Besides Diff Fluid, I also bought Brake Fluid and TCase fluid. Will flush them some day when car hits ~80K.

Thanks to TheBigYhi! This is a better place than BMW shop!

11-03-2015, 08:00 AM	#1
bmwsucks2 Enlisted Member 0 Rep 35 Posts Drives: 2006 BMW 330XI Join Date: Aug 2015 Location: Hartford iTrader: (0)	[Solved] 2006 BMW 330XI noise diagnosis Brought my 2006 BMW 330XI to BMW Dealer. == Cause == "Found internal fault for transfercase. ", Dealer's report suggests "replace transfercase and mount" then "reprogram vehicle DSC". I don't know how BMW technician checked my car... Probably they just scan the codes and cleaned my wheels... Shinny! == Question == Could it be just "transfer case actuator" instead of the whole transfer case? How to diagnose? Or, In general, How to proceed in such a case? Thx! ========= Update ========= Last weekend, I did two things: 1) Flush the Diff oil. 2) Rotate tires from Rear to Front, Front to Rear; and inflate the tire pressure to specs (32 psi (F), 36 psi (R)) Noise was gone. Should I dispute the BMW dealer's diagnosis charge which detects a "Transfer Case Internal Error" and suggests to replace the whole Transfer Case for $4000!?? Last edited by bmwsucks2; 11-09-2015 at 08:18 AM..
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11-03-2015, 01:48 PM	#2
TheBigYahi Private First Class 40 Rep 164 Posts Drives: 2006 330xi 6MT Join Date: Jun 2014 Location: Syracuse, NY iTrader: (0)	Based on this DIY, I would say it's worth a shot: http://www.e90post.com/forums/showthread.php?t=633200
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11-04-2015, 12:35 PM	#3
bmwsucks2 Enlisted Member 0 Rep 35 Posts Drives: 2006 BMW 330XI Join Date: Aug 2015 Location: Hartford iTrader: (0)	TheBigYhi, thanks very much! This is definitely worth a shot. I will take the actuator off to take a look. I planned to replace the Tcase fluid anyway...
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11-04-2015, 06:23 PM	#4
bmwsucks2 Enlisted Member 0 Rep 35 Posts Drives: 2006 BMW 330XI Join Date: Aug 2015 Location: Hartford iTrader: (0)	TheBigYhi, a quick question, I read the DIY. But in my case, there's no any lights on, only grinding noise. It gets louder at 40 - 50 MPH. If tcase failed, should there be any lights on? Thx!
	Appreciate 0 Quote

11-09-2015, 08:19 AM	#5
bmwsucks2 Enlisted Member 0 Rep 35 Posts Drives: 2006 BMW 330XI Join Date: Aug 2015 Location: Hartford iTrader: (0)	Besides Diff Fluid, I also bought Brake Fluid and TCase fluid. Will flush them some day when car hits ~80K. Thanks to TheBigYhi! This is a better place than BMW shop!
	Appreciate 0 Quote