Dangerous posi issue, please help! Almost died.

mustang_jr+

Member
May 8, 2003
150
1
18
I had my posi rebuilt and put in. Car was fine for a day
until I was shifting from 2nd to 3rd at wot and
the rear locked up solid and the car was basically dragging the
rear.

I backed out into neutral, and it did the same thing until I slowed down to
40mph and dropped it into 3rd.

Coming home after that, going downhill, not accelerating,
shift to third, rear locks solid, card dragging the wheels.

This is crazy dangerous, I almost died the first time
as the car fishtailed back and forth.

Any idea? It has all new clutches. I was reading it might be a bad spider gear??

96 cobra...
Please comment this is bad and I have no desire to wind upside down in
a ditch.
 
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there is a dowel pin that runs through the posi it has one small bolt that holds it in and the pin holds the spider gears these can back out and lock against the housing of the rear end pull the cover and look if it did most likely just pull and junk the rear end
 
I'm going to have to reweld it or get tougher ones.

I knew I should have put in a panhard bar, but I never
did and this happened.

It's a lot cheaper and easier to fix than if I blew up the rear.

14 years of driving is a long time, so I guess stuff is prone to
breaking as our cars get older. I also did some stuff
that added power and I guess it was too much.