About a month ago I was doing some WOT passes, trying to diagnose the hiccup in the acceleration I've been chasing, and on a smooth pass the rear tires broke free at about 5000 rpm and just started spinning. Rolling burnout, fuck yeah horsepower. Of course, this also worried me because the ix should be the last e30 capable of doing this. A few more passes and I realized my AWD was not working as it should. Then my ix got stuck in the mud in the backyard. 
I had my gf come out and she confirmed that neither front tire was moving, while my back end was spinning and sinking. Got the Explorer and pulled the ix out. That's the backstory.
So, yesterday I put the ix up on my neighbors lift, turned it on, put it in gear. Very oddly, only 3 tires spun. The rear and the driver's side tire. I grabbed the front driveshaft to see if I could stop it with my hands to check if the TC was shot. I could not stop it, so I assumed it was ok. Turned the car off, put it higher in the air, got underneath. Everything looked normal to me. My neighbor commented that the passenger side halfshaft didnt look seated properly. I took a pry bar and wiggled it in there and it pulled smoothly out, about an inch. Of course, I could not push it back into place. We took the halfshaft nut off, used a brass drift, and then pounded on it to reseat it into the diff. Honestly, I can't tell if it moved further in than the original location after that. If it did, it did so maybe a quarter inch.
Passed the jack test once it was on the ground as well. Stripped splines are the only thing I can think of to explain this behavior. Any thoughts?
I had my gf come out and she confirmed that neither front tire was moving, while my back end was spinning and sinking. Got the Explorer and pulled the ix out. That's the backstory.So, yesterday I put the ix up on my neighbors lift, turned it on, put it in gear. Very oddly, only 3 tires spun. The rear and the driver's side tire. I grabbed the front driveshaft to see if I could stop it with my hands to check if the TC was shot. I could not stop it, so I assumed it was ok. Turned the car off, put it higher in the air, got underneath. Everything looked normal to me. My neighbor commented that the passenger side halfshaft didnt look seated properly. I took a pry bar and wiggled it in there and it pulled smoothly out, about an inch. Of course, I could not push it back into place. We took the halfshaft nut off, used a brass drift, and then pounded on it to reseat it into the diff. Honestly, I can't tell if it moved further in than the original location after that. If it did, it did so maybe a quarter inch.
Passed the jack test once it was on the ground as well. Stripped splines are the only thing I can think of to explain this behavior. Any thoughts?
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