Quote:
Originally Posted by Bill Bulmer
I just changed from the 3.46 factory open differential to a 3.91 posi, and it is like a different car. All the chugging and bucking from lagging at low rpm's is gone, and I can actually get decent traction when I hit he gas in 1st and 2nd now. I would order the car with the posi if I had it to do again.
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What kind of rpm are you seeing at 70 mph in 5th gear with the 3.91?