Posi????

All stock Mark VIII's came with an open differential. Posi is a G.M. term, for Ford it is Traction-Lok.
 
A lot of people have made their Mark have Trac-Lok though, if that's what you're asking...?
 
bigdog1279 said:
what is Track Lok i have never heard of that befor

To make a long story short, it'll make both real wheels spin. Right now if you were to peel out, it would probably only be 1 wheel.
 
I had my car upgraded to "trak-lok" or "posi"...whatever you want to call it. It did not come with this.
 
jdlmkviii said:
To make a long story short, it'll make both real wheels spin. Right now if you were to peel out, it would probably only be 1 wheel.

Exactly, any one know were or how much it would cost throw out some prices.
 
I wouldn't bother just doing posi alone without the gears. I'm waiting down the road to just do it all which might be as soon as this winter. As for prices, probably $500 or so? plus parts if you do the gears too. (ring and pinion, also need a heavy duty driveshaft, and some other stuff)
 

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