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| 01-13-2015, 01:19 AM | #1 |
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Major
 
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Drives: N54 135i 6MT
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Location: Sydney, Australia
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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 03:53 PM.. |
| 01-13-2015, 04:00 AM | #2 |
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Second Lieutenant
 
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Steve,
You need 33107609536 31507609535 is for an AUS delivered AUTO 135i Bentley manual torque values below It also makes special note about marking the pinion end and nut and when re-tightening to not go past this point. This is because there is a crush tube between your small and large pinion bearings which is pre-set to get the correct pinion height. Over tightening will crush it further and change your pinion height (not good). Also mentions a few "BMW tools" for pressing the drive flange onto the pinion shaft enough to install the collar amoungst other things. Having not done it myself I'm not sure these are essential tools or just "make your life easier" tools. Good luck! |
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| 01-13-2015, 04:04 AM | #3 |
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European Editor
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Order two seals(two of the same seal)... bc you might mess up the first one on the DIY install. Try to use a seal flange tool to pound in the new seal. Use some grease on the seal before installing it.
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| 01-13-2015, 04:01 PM | #4 |
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Major
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Drives: N54 135i 6MT
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Thanks Chris and Dacks.
How did you come up with that info Chris? My VIN is VF19671 if anyone else would like to confirm the part number I need Thanks guys |
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| 01-13-2015, 06:07 PM | #5 |
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Second Lieutenant
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Because I'm an expert
 No seriously I have spent the last 3 months sorting out an LSD and now well versed across the diffs, including every right and wrong part (I have been sent wrong pinions etc.) Also your car is the exact same year and month build as mine. If your on RealOEM you see 2 different diffs don't you? One is for auto and one is for manual. You can tell by the final drive being 3.08. Manual also has the flex-joint diff flange, auto has the splined on driveshaft. It is 33107609536 you need. |
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| 01-13-2015, 06:19 PM | #6 |
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Drives: N54 135i 6MT
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Ahhh genius! That's why there is 2 diffs lol
When you say flex joint - do you mean universal joint? I'm trying to refer to the table with torque figures |
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| 01-13-2015, 06:26 PM | #8 |
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Drives: N54 135i 6MT
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Maybe ill measure the current torque with my digital torque wrench and guestimate what its closest to??
The crush tube you mention, would you recommend that I replace it? Or do you think that would be opening a can of worms? |
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| 01-13-2015, 08:31 PM | #10 |
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Major
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Drives: N54 135i 6MT
Join Date: Aug 2014
Location: Sydney, Australia
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Hmm.. Do you think I should disregard the torque specs and stick to the marking I draw on the pinion and nut?
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