Differential MESS

bimmer777 · Tue, Apr-27-2010, 12:04:20 PM

Mine has been "sweating" for a while and last time I had to top off the diff. I think it is finally time to replace it.

Can anyone confirm the part number? Somebody must have done the swap!

Hu///mmell · Tue, Apr-27-2010, 12:09:13 PM

I have the same problem on my car. It's the pinion seal. I need to get it fixed.

neuralracing · Tue, Apr-27-2010, 01:48:57 PM

Quote:

Originally Posted by kaiv

Am I the only one who expected to see some chewed up gears by clicking this thread? ^^

+1

jedi_k · Sat, Jul-31-2010, 12:30:09 AM

I'm in the same boat. Any DIY?

GRKM3 · Sat, Jul-31-2010, 12:45:48 AM

upgrade to 3.91 while you're at it.

hogger453 · Sat, Jul-31-2010, 01:40:14 AM

I just happen to have a couple in front of me. Putiing them in a couple of weeks.

33 10 7 510 289 seal and clip.

cw · Wed, Mar-09-2011, 03:38:13 AM

Is the driveshaft loaded when connected to the diff? Or is it just plug and play?

**flow350** · Wed, Mar-09-2011, 02:26:46 PM

Quote:

Originally Posted by bimmer777

Bump this, didn't want to start a new thread. I have the same exact problem (main input shaft leaking) and want to make sure I get the right seal. Is it #7 (part#33121213949) from the diagram in the above post?

Other items I will change:
1. Guibo since I will have to drop the prop shaft.
2. Diff bolts - swap out old fully threaded ones for new ones where the thread does not go up all the way to the hat.

Anything else I should look for? The output seals are not leaking so I don't want to touch them. Subframe was already welded.

You should also replace the center support bearing of the driveshaft while you have it out. The part number is: 26122282495. Also, you have to drop the exhaust for this job. You should use new gaskets for the exhaust. You will need 2 flat gaskets: 18307830674 and 4 gasket rings: 11627830668

**flow350** · Wed, Mar-09-2011, 02:28:07 PM

Quote:

Originally Posted by cw

Is the driveshaft loaded when connected to the diff? Or is it just plug and play?

Not sure I understand your question... But, I think you are asking if there is any tension on the driveshaft. There is not any tension on the driveshaft unless the car is on the ground and under power.

bimmer777 · Wed, Mar-09-2011, 02:48:40 PM

Quote:

Originally Posted by flow350

You should also replace the center support bearing of the driveshaft while you have it out. The part number is: 26122282495. Also, you have to drop the exhaust for this job. You should use new gaskets for the exhaust. You will need 2 flat gaskets: 18307830674 and 4 gasket rings: 11627830668

Thread is from a while ago and i did this last spring, but thank you for the advice. The job was flawless, diff is perfect now. I did replace gasket rings and all the exhaust bolts as they were getting pretty corroded. Didn't replace the flat gaskets or the center support bearing. The bearing didn't look bad and only had 50k miles on it, do these go bad? I can always replace it as part of my spring maintenance as I plan on replacing the Guibo among other things.

Tue, Apr-27-2010, 12:04:20 PM	#11
bimmer777 I drive an AWD Turdbro Join Date: Feb 2007 Posts: 2,254 Reputation: 0 Location: NYC	Mine has been "sweating" for a while and last time I had to top off the diff. I think it is finally time to replace it. Can anyone confirm the part number? Somebody must have done the swap! __________________ "Good drivers have dead flies on the side windows" - Walter Röhrl

Sat, Jul-31-2010, 12:45:48 AM	#15
GRKM3 Registered User Join Date: Mar 2006 Posts: 2,082 In the garage: '03 BMW M3 Reputation: 0 Location: Long Island, NY	upgrade to 3.91 while you're at it. __________________ 2003 Steel Gray Metallic M3 - Imola Red Interior - SMGII - Premium - HK Sound - NAV - BT -Sirius Mods :VFE Stage 2 SC, SS Ceramic Coated Stepped Headers, S-Pipe, X-Pipe,TMS Subframe Reinforcement, KWV2 Coilovers, TMS Camber Plates, Powerflex RTAB's, Rogue RSM's, ZCP F/R Brakes, OEM CSL Roof, VCSL D/S Carbon Trunk, diffuser and bumper, Armrest Delete, carbon mirror shells, OEM LED tail lights, BBS CH, Alcantara steering wheel, Armrest delete, Valentine V1, Laser Interceptor... 5D Mark III \| 24-70 2.8 IIL \| 17-40 4L \| 50 1.8II \| 580EXII

Wed, Mar-09-2011, 03:38:13 AM	#17
cw Registered User Join Date: Jun 2002 Posts: 575 Reputation: 0 Location: Vancouver, Canada	Re: Differential MESS Is the driveshaft loaded when connected to the diff? Or is it just plug and play?

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Tue, Apr-27-2010, 12:09:13 PM	#12
Hu///mmell Registered User Join Date: Oct 2009 Posts: 1,555 In the garage: '03 BMW E46 M3 Reputation: 0 Location: Charlotte - Plaza Midwood	I have the same problem on my car. It's the pinion seal. I need to get it fixed.

Sat, Jul-31-2010, 12:30:09 AM	#14
jedi_k Registered User Join Date: Jan 2009 Posts: 19 Reputation: 0 Location: ATL	I'm in the same boat. Any DIY?

Sat, Jul-31-2010, 01:40:14 AM	#16
hogger453 Registered User Join Date: Aug 2006 Posts: 4,735 In the garage: '13 AUDI A3 '90 FORD MUSTANG Reputation: 0 Location: Los Angeles	I just happen to have a couple in front of me. Putiing them in a couple of weeks. 33 10 7 510 289 seal and clip.