LEAKING REAR DIFF

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   MY 635 HAS A OIL LEAK FROM THE REAR DIFF FRONT OIL SEAL. I HAVE BEEN TOLD THAT TO CHANGE THIS IS A SPECIALST JOB, AS APPARENTLY WHEN THE SEAL IS CHANGED THE BEARING HAS TO BE TENSIONED CORRECTLY. MY LOCAL BMW SPECIALIST HAS QUOTED ME APPROX �120 TO DO IT. IS THIS TRUE ?. 

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SIVER FOX Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 13-April-2006 Status: Offline Points: 7	Topic: LEAKING REAR DIFF Posted: 16-June-2006 at 21:36
	MY 635 HAS A OIL LEAK FROM THE REAR DIFF FRONT OIL SEAL. I HAVE BEEN TOLD THAT TO CHANGE THIS IS A SPECIALST JOB, AS APPARENTLY WHEN THE SEAL IS CHANGED THE BEARING HAS TO BE TENSIONED CORRECTLY. MY LOCAL BMW SPECIALIST HAS QUOTED ME APPROX �120 TO DO IT. IS THIS TRUE ?.

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phb10186 Members Profile Send Private Message Find Members Posts Add to Buddy List Really Senior Member I Joined: 18-April-2005 Location: North London Status: Offline Points: 331	Posted: 16-June-2006 at 22:25
	I seem to have the same problem - fresh oil noticed from the front oil seal of the rear diff, where the prop shaft enters. Have been told its a hassle to do, but have not delved any deaper than this as I am extremely tied up with work at the mo. Please let me know how you get on, as I will need to do this at some point soon as well. -Ben
	1985 635 CSI with Style 134's 1998 Z3 2.8i

SIVER FOX Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 13-April-2006 Status: Offline Points: 7	Posted: 19-June-2006 at 00:14
	Will Do. It will be going in for its service shortly, and so i will get the leak sorted at the same time. will let you know how i got on.

Andrew Rolland Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Go away rain Joined: 19-August-2004 Location: Scotland Status: Offline Points: 6579	Posted: 19-June-2006 at 08:10
	I saw this post and was hoping it was about a) an E39 and b) it was about the drain plug as my E39 has got a slight weep from the drain plug. So sorry for the intrusion into this rather unknown area of the forum for me! Sounds about the right price give the labour and difficulty in accessing if the diff is still on the car. The diff pinion oil seal will be a 'big' job as they will need to remove the prop shaft, undo and remove the pinion shaft to prop shaft drive plate flange nut. This nut will be very tight as it puts a pre-load onto the pinion shaft bearings, by most probably collapsing a small tubular spacer. Once the nut is off, the prop shaft drive plate will need pulled off, then you can get access to the oil seal which will be able to be removed and replaced in about 5 minutes. "Classic Haynes line now" Refitting is reversal of removal which includes horsing up the torque on the pinion shaft to prop shaft drive plate flange nut. I will now scuttle back to the 5 series technical forum and wait patiently until someone else has the same leaking diff problem as me! Andrew
	Be exclusive and drive a Petrol 5 Series! Current '13 62 F10 535i MSport Auto Previous '04 04 E60 545i SE Auto '03 53 E60 545i SE Auto (Stolen) '98 S E39 523i SE Auto

Check it out! Members Profile Send Private Message Find Members Posts Visit Members Homepage Add to Buddy List Really Senior Member I Joined: 02-May-2004 Location: Bristol/ Glos Status: Offline Points: 373	Posted: 20-June-2006 at 12:23
	i've got the output shaft from a sport box to do, the front crankshaft il seal was a doddle on car, is the output shaft from the sport box similar (635csi, dogleg box). apologies for changind the subject a little....
	www.335itc.co.uk Its gonna be finished for summer!!! thats the plan!!!