Rear diff oil leak

totti84 · 01-13-2015, 02:21 AM

Hi guys,

My car is a 6 speed manual N54 135i.

I have a oil leak coming from my rear diff, where the tailshaft connects the front of the diff (haven't had a chance to take photo's)

Previous owner had a shop install a Quaiffe LSD so I'm assuming they may have reused or poorly installed the front seal.

I plan on replacing this myself, and I have found which seal I need thanks to c0ris07!

Seal to be replaced
Item# 9 or OEM Part# 33107609536

Seal measurements 50X78X10/15

So in conclusion:
1. Anyone have a workshop manual to check the torque required on the pinion nut?
2. Is there any DIY threads of diff rebuild or similar repairs?

Thanks guys
Steve

totti84 · 01-14-2015, 04:54 PM

OP updated! Any tips or DIY threads around for help me attack this best?

Tzu · 01-15-2015, 06:57 AM

There are DIYs in the suspension forum in which the diff was removed to facillitate install of an LSD with other suspension components. The torque for the driveshaft nut can be found there. You need a 50mm wrench I beleive, and I think AR Design makes one.

c0ris07 · 01-15-2015, 09:48 PM

No he doesnt, we have a 'guibo' flange between our diff/driveshaft...AU cars are different....

totti84 · 01-20-2015, 02:41 AM

I can't find any DIY threads regarding diff removal or rebuilds. Can anyone help??

01-13-2015, 02:21 AM	#1
totti84 Major 114 Rep 1,140 Posts Drives: N54 135i 6MT Join Date: Aug 2014 Location: Sydney, Australia iTrader: (5) Garage List 2009 BMW 135i M Sport [0.00]	Rear diff oil leak - any DIY threads around? Hi guys, My car is a 6 speed manual N54 135i. I have a oil leak coming from my rear diff, where the tailshaft connects the front of the diff (haven't had a chance to take photo's) Previous owner had a shop install a Quaiffe LSD so I'm assuming they may have reused or poorly installed the front seal. I plan on replacing this myself, and I have found which seal I need thanks to c0ris07! Seal to be replaced Item# 9 or OEM Part# 33107609536 Seal measurements 50X78X10/15 So in conclusion: 1. Anyone have a workshop manual to check the torque required on the pinion nut? 2. Is there any DIY threads of diff rebuild or similar repairs? Thanks guys Steve Last edited by totti84; 01-14-2015 at 04:53 PM..
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01-14-2015, 04:54 PM	#2
totti84 Major 114 Rep 1,140 Posts Drives: N54 135i 6MT Join Date: Aug 2014 Location: Sydney, Australia iTrader: (5) Garage List 2009 BMW 135i M Sport [0.00]	OP updated! Any tips or DIY threads around for help me attack this best?
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01-15-2015, 06:57 AM	#3
Tzu Lieutenant Colonel 29 Rep 1,551 Posts Drives: 335i Join Date: Jun 2010 Location: Toronto iTrader: (1)	There are DIYs in the suspension forum in which the diff was removed to facillitate install of an LSD with other suspension components. The torque for the driveshaft nut can be found there. You need a 50mm wrench I beleive, and I think AR Design makes one.
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01-15-2015, 09:48 PM	#4
c0ris07 Second Lieutenant 26 Rep 216 Posts Drives: BMW 135i Join Date: Nov 2013 Location: South Australia iTrader: (4)	No he doesnt, we have a 'guibo' flange between our diff/driveshaft...AU cars are different....
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01-20-2015, 02:41 AM	#5
totti84 Major 114 Rep 1,140 Posts Drives: N54 135i 6MT Join Date: Aug 2014 Location: Sydney, Australia iTrader: (5) Garage List 2009 BMW 135i M Sport [0.00]	I can't find any DIY threads regarding diff removal or rebuilds. Can anyone help??
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