k75 drive shaft splines worn... need some advice

[eianw]

so, as the title says, i have a 1994 k75 with about 50k miles which has a worn drive shaft
wear on the final drive side that is. 

some pictures at the following link:

https://picasaweb.google.com/100633410173082846352/6291656760096836657?authuser=0&authkey=Gv1sRgCMWc6O3YsY28QA&feat=directlink

has anyone used one of these?:
http://www.beemershop.com/Merchant5/merchant.mvc?Store_Code=BS&Screen=PROD&Product_Code=TRA54063

saw a rumor somewhere that they are better than the bmw oem part. 

thanks all
sincerely,
Eian

[eianw]

also, a little hard to see in those photos but there is a very slight ridge on the spines on the final drive too
from the worn splines on drive shaft.. should i replace final drive too?  or at least the input splines? 
-eian

[johnny]

id be interested in seeing the clutch splines before posting my opinion of how to proceed...

1st of 6 parts getting into the clutch splines...



j o

[Laitch]

there is a very slight ridge on the spines on the final drive too

I view the rear drive splines as be severely worn and some of sawtooth tips ready to break off under load from a new drive shaft.