Tranny oil seal

[whiskychaser]

Anyone replaced seal no. 4 here:
http://www.realoem.com/bmw/showparts.do?model=HD68&mospid=47405&btnr=24_0654&hg=24&fg=15
If so,
1. how did you undo the silly shaped nut and hold the flange?
2. Any torque settings I should know about?
This is of course different from the one shown in Bentleys:(

[yaofeng]

Here is a 2,000 words description,

http://i21.photobucket.com/albums/b274/yaofengchen/BMW_95_525i/DSC_1749.jpg

http://i21.photobucket.com/albums/b274/yaofengchen/BMW_95_525i/DSC_1748.jpg

The flange is removed using a 3/4" drive ratchet. I do not have a 3/4" drive torque wrench. Just tightened it by feel. Looking at the pictures again, I was wrong. The 30 mm socket was on an 1/2" drive air impact. I must have also tightened it to spec because the socket is 1/2" drive. The torque setting book must have it.

[whiskychaser]

Here is a 2,000 words description,
The flange is removed using a 3/4" drive ratchet. I do not have a 3/4" drive torque wrench. Just tightened it by feel. Looking at the pictures again, I was wrong. The 30 mm socket was on an 1/2" drive air impact. I must have also tightened it to spec because the socket is 1/2" drive. The torque setting book must have it.
I like it:-) But mine doesnt have the nut on the outside of the flange:

[yaofeng]

Got me.

[whiskychaser]

For anyone else contemplating this, have a look at the online tis first - if you remove the tail end of the gearbox there is a chance all the clutches drop out! Thats if you can actually find a pin wrench socket to undo the grooved nut inside anyway:(