Just got rid of the Twin Traction beam front end crap from my truck. The swap was easy, went from 3.55's to 4.10's and some how my speedometer recalibrated automatically. Rides much better, and doesnt wear out the insides of my tires now. Will get pics up soon.

 

I think the speedo pick-up goes by the ring gear. In effect, it measures tire rotations. Same size tire = same speed.

 

Hmm cant argue with that. I bent a drag link last night testing it out though Ohh well ill probably just bend it back and weld a piece of angle iron on it.