Hey peeps, I've got a Volvo 740 and finding performance parts for the car is not easy. I knew the consequences for choosing such a car but I wanted to be different to the usual Nissans and jap imports. Currently I've got it welded but I have to get a roadworthy check done and my mechanic won't pass it (legalities). I have a few options. Unfortunately no clutch LSDs off the shelf. Head to the wreckers and swap in the open diff, change back to welded later Buy a true-trac helical LSD - Legal but no good for drifto Aussie locker, detroit locker aka automatic locking diff - pretty cheap $3-400. Easily installed. Might not be legal but a possible option nonetheless. Jeep XJ Cherokee rear diff (Dana 35) clutch LSD. Suggested by another Volvo-er. Unsure of fitment as the Volvo is Dana 30 (XJ Jeep FRONT). I've trawled the internet and no one seems to use locking diffs, but maybe because all popular makes have off the shelf stuff like KAAZ or come stock with VLSD. My understanding is that auto lockers allow a bit of slip when turning but locks up when torque is applied. They work like a ratchet so wheels cannot slip backwards. All mechanical clutch LSDs lock under acceleration so I don't see much different here. Perhaps someone with experience in the locker can chime in?