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[kcl]

On very old Opel cars the diff oil can be drained by opening one of the lower bolts, the bolt hole has a channel to the casing. Now, in an Omega, there is no drain plug but people have drilled a 5mm hole to the bottom of one of the lower bolt holes to drain the oil. And, when filling, you keep the bolt off until new oil is coming out so no drill chips etc will not remain inside casing.

This method is alot easier that to open the whole diff and has been succesfully used. Yes, I know, it is not necessarily the most professional method but as said, older Opels have this feature factory fit.

[Kevin Wood]

Yep, good tip although not much need to change diff oil unless it's a LSD IMHO.

Remember some thread sealant or PTFE tape, etc. on the bottom bolt when refitting to ensure it stay oil-tight.

Kevin

[kcl]

Most of the Omega's in Finland are with LSD 

[Kevin Wood]

Most of the Omega's in Finland are with LSD 

<Monty python quote mode>
You lucky, lucky batsrad.
</Monty python quote mode>

 

Kevin

[kcl]

Well, 50-100 cm of snow and temp below -30 celsius for almost half a year, are we that lucky afterall  LSD is a must to get the Omegas on the move in wintertime  8-) And, the most important: goes better sideways in junctions