VR abs diff

Hi, I have a Vr v8 with a noisy diff. (IRS) I have bought another centre off a mate but my car has abs and the new centre doesn't. Does any one know how to change over the tone wheels? (Tone wheels are the bits in the sides of the centre that look like gears) Any help would be great.
Mark.

hey man i also have a vr v8 5l manual. if it would make it easier my partner knows alot about tone wheels and vrs as he is always working on mine. he also works at holden so i have 2 options ill throw at u. if u want to change them yourself i can get u a manual of how 2 do so or if u dont wanna do that i can get u a discounted price from holden to get it done. u choose. also im looking to do a drive out next weekend. it would be great 4 u 2 join us. email me and let me know.

cheers buddy