isnt there something that can lock the spyder gears together?
look on ebay-----8.8 posi unitI'd have to go with a mini spool. Don't ghettofy your rear end with welds that will not hold up to the power you might plan in the future. If those welds break, so does your rear end. I'd just spend the 130 bucks from jegs for a spool and get it done right the first time if you want to lock up both tires. Hell now a days, the whole differential can run you about $375.00 for a good street one. if you like spending money, get a richmond diffy that runs $700 and never worry about your "rear-end"
there showing some lockers on ebay ...8.8 posi unitTo answer the original question.........limited slip, posi, traction lock and sure grip are all the same thing. Posi is not an upgrade of limited slip. Posi is limited slip. The only way to have a fully locked rear end is with a spool or an air locker.
Don't focus so much on one thing, that's why it's a headache, not to mention 9 people told you 9 different things. You're wondering about locking the wheels so you won't be embarrased at the track with that "daisy-wheel" burnout. SO it's determined that POSI-trak, limited slip and those other fancy pants marketing names come out to be the same right? So your concern is, HOW TO MAKE BOTH DAMN WHEEL SPIN!!!. Just pick up a jegs mag or summit, look for a mini-spool or an actual diofferential for 87-93 stangs, place your order, get your order and install or take it to a shop and have them do it. Do worry about if it will work, the description in this case will say 87-93 stang lx/gt or LX or GT. Look for your model and have no fear. Splines? 28sp will be just finejezzz this is sounding like a headache