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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > All-Wheel-Drive (Xi / xDrive) Talk > 335xi Transfer Case Fluid Change DIY



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      11-11-2018, 08:30 PM   #1
finallall
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335xi Transfer Case Fluid Change DIY

I wanted to do this DIY since people are having a difficult time removing the fill plug on the transfer case without removing the transfer case mount bracket.

This is the way I did it in 5min without removing the bracket. I did have the exhaust and shield removed since I'm doing other repairs that require it off.

The Bentley manual calls for a 14mm Hex nut socket but I didn't have one. + I read it's impossible to get it in without removing the bracket or cutting down the socket. So I bought a 9/16 long nut from Home Depot. Cost 99 cents. Anyway here is the procedure I followed:


Car on jack stands and as leveled as possible.

Pic # 1 is the long nut 9/16 size or 14mm

Pic # 2 nut installed

Pic # 3 used 14mm wrench to turn

Pic #4 fluid drained into a container. Make sure container is at least 700 milliliters. Their's supposed to be 520ml but I got only 411ml. You can see how black the fluid is. Once drained completely reinstall plug and torque to 44ft/lb.

Pic # 5 Long nut installed on the fill plug.

Pic # 6 used 14mm wrench again to unscrew fill plug.

Pic #7 shows the old fluid @ 411ml. I used a long hose squeezed onto the new fluid bottle to create enough extension to feed the new fluid in. I just raised the bottle as high as I could and squeezed to make the fluid come out until it started to overflow from the fill plug.

Pic #8 shows the level of fluid remaining in the container. It took about 520ml to fill it up which is the proper fluid amount as per the Bentleys manual.

Last Pic # 9 shows I used a crows foot to create enough space to sneak my torque wrench in and torque it to 44ft-lb.

Anyway hopefully someone finds this post useful.
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      11-11-2018, 08:43 PM   #2
Needbmwpartzz
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what type of fluid did you use?
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      11-11-2018, 08:51 PM   #3
finallall
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Ravenol Transfer Fluid Tf-0870
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      11-12-2018, 01:00 AM   #4
Blueeyesredpanda
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Is this an AT or MT?
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      11-12-2018, 11:33 AM   #5
nsjames
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My only addition is, make sure you break the fill plug free before you drain it.

that's a lesson you learn once.
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      11-12-2018, 02:33 PM   #6
finallall
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Quote:
Originally Posted by Blueeyesredpanda View Post
Is this an AT or MT?
Manual.
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      11-21-2018, 03:06 AM   #7
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Your method can only apply to MT. AT transmission took up more space.
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