I have had many ex police senators and omegas 3.0 /3.2 manual and auto with LSD. On acquisition from the BCA or WOMA auctions they always performed 100% and were actually a nice tight diff that locked up good and early. I usually changed the diff oil and refilled with gm diff oil and tube of gm friction modifier at 100k and in every case the were performing really well many miles later.
Best way to acquire one now is to buy an mot failed ex police omega for pennies and strip it.
I agree with everything youve just said there.
Apart from the last sentence.
There was a time when you couldnt give away Ex Plod Omega,s, now there like Rocking Horse Poo.
Edit: and there worth a fair bit now considering the fitments.
Just thought I,d through that last bit in case I decide to sell any of mine.