Swapping long neck input flanges

[offsubject]

I am in the process of replacing a broken long neck diff from my 1968 '02.  Given that the long neck diff in NK/1600-2/2002 came with two styles of input flange (three bolt w/guibo and 4 bolt with u-joint), is it straightforward to pull an input flange from one and place on another? Or does that involve cracking open the diff to replace things like crush washers etc. Would make sourcing a replacement simpler if not constrained to one type of input flange and can simply take the flange from my broken unit and swap it over.

 

Thanks!

 

 

[Schnellvintage]

The input flanges should be able to be swapped.  The driveshaft will need the be modified, but I think you knew that already.

 

Regards,

Matt

[jimk]

Bearings will have been run-in, so the bearing preload is not the same as for new bearings.

[TobyB]

https://www.bmw2002faq.com/articles/technical-articles/history-and-reference/bmw-2002-service-repair-manual-r247/?tab=comments#comment-1382

 

 

and then read down to where it says

 

 

...so, yes.  the flange is not part of the pinion stack,

like it is in the shortneck.

 

t

 

[uai]

Three bolt flanges are not interchangeable between Neue Klasse and 1600-2 Neue Klasse is larger in diameter.
So there are at least three longneck flanges

Edited February 28, 2023 by uai