Bad transfer case

Julian2485 · 01-05-2018, 12:18 PM

Quote:

Originally Posted by JETmn

Quote:

Originally Posted by jskin1510

I'm wondering if this is what happened to mine (or maybe transfer case actuator? or is this the same thing)

A few months ago, as soon as the car started moving (or I went into gear) I got the lights and notifications on I-drive AWD, DSC, 4x4, Brake malfunction. Car has been only RWD ever since.

Wondering if this is the most likely option of what went wrong? or possible other options? Any other symptoms of what else was going on with yours before you confirmed it was this?

I would try the worm gear first. Had the drivetrain been making grinding noises prior to that? Mine was getting pretty noisy and still hadn't thrown any codes.

With the worm gear issue due you hear grinding all the time ?

JETmn · 01-08-2018, 08:58 AM

Quote:

Originally Posted by Julian2485

With the worm gear issue due you hear grinding all the time ?

I don't believe so (haven't had that issue myself). Grinding is probably a bearing going out.

Julian2485 · 01-08-2018, 11:24 AM

Quote:

Originally Posted by JETmn

Quote:

Originally Posted by Julian2485

With the worm gear issue due you hear grinding all the time ?

I don't believe so (haven't had that issue myself). Grinding is probably a bearing going out.

How would one know if it's the wrong gear then ?

JETmn · 01-09-2018, 11:48 AM

Quote:

Originally Posted by Julian2485

How would one know if it's the wrong gear then ?

Worm gear will throw codes. Bearing usually does not.

ucdbiendog · 01-09-2018, 11:49 AM

Quote:

Originally Posted by JETmn

Worm gear will throw codes. Bearing usually does not.

if you're referring to the needle thrust bearing going out, it can cause a code if the clutch arm gets spun around too far.

Julian2485 · 01-09-2018, 02:20 PM

Quote:

Originally Posted by JETmn

Quote:

Originally Posted by Julian2485

How would one know if it's the wrong gear then ?

Worm gear will throw codes. Bearing usually does not.

What codes would it throw ?

JETmn · 01-10-2018, 10:07 AM

Quote:

Originally Posted by ucdbiendog

if you're referring to the needle thrust bearing going out, it can cause a code if the clutch arm gets spun around too far.

My bearing that went out was the front output bearing. I was getting a pretty good drivetrain vibration and some noise from it and hadn't thrown any codes at that point. Play in the .050" range, so it was significant.

ucdbiendog · 01-10-2018, 10:11 AM

Quote:

Originally Posted by JETmn

My bearing that went out was the front output bearing. I was getting a pretty good drivetrain vibration and some noise from it and hadn't thrown any codes at that point. Play in the .050" range, so it was significant.

OH, yah that makes sense that that bearing wouldn't throw a code. my misunderstanding

BKV122 · 08-14-2018, 07:34 AM

I have the same situation as OP.

I got a '06 330xi 145k miles, got the 3 warning lights on the dash during start up, saw the worm gear on the actuator motor was the main culprit. Removed it and the worm gear looked fine, decided to try a used actuator motor.
Thats when I remembered this thread and to check the positioning of the gear inside the TC, noticed wasn't lined up same as OP. Im going to assume that my needle bearings failed which caused the gear to over rotate as ucdbeindog was so find to explain

08-14-2018, 07:34 AM	#31
BKV122 Major 47 Rep 1,160 Posts Drives: E90 Join Date: Feb 2009 Location: NY iTrader: (1) Garage List 2006 330xi [9.50]	I have the same situation as OP. I got a '06 330xi 145k miles, got the 3 warning lights on the dash during start up, saw the worm gear on the actuator motor was the main culprit. Removed it and the worm gear looked fine, decided to try a used actuator motor. Thats when I remembered this thread and to check the positioning of the gear inside the TC, noticed wasn't lined up same as OP. Im going to assume that my needle bearings failed which caused the gear to over rotate as ucdbeindog was so find to explain __________________ Monaco Blue 330xi - Terra Interior/6-MT/Sport/Premium/Cold/CSL's/M3 Spoiler Lip/Black Kidney's
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