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  1. Transmission - Rearend
    I've got a 66 LTD, 390+c6(both swapped in)+9inch. I've been fighting highway vibrations for a while now. First, I had this oscillating harmonic vibration that felt drivetrain related. I thought it was my pinion angle, which was way off, but it was still there when I fixed it. Oddly, I had the...
  2. Hotrodding Basics
    Hey guys, I have a 1968 F-100, 48K original miles, Custom-Cab long bed, 240 CID with 3 on the tree, 3.70 9 inch rear. All stock with the exception of paint( something I made from a too-light red and black), wheels and tires (15" white wagon wheels and 275-60-15 BFG T/A's) and cap and rotor. As...
  3. Transmission - Rearend
    Hello! I was hoping someone could help me decode the stamping marks on my differential. It's been painted over, and the original metal tag (if there was one) is gone, so this is all I have: I THINK this is what they say, feel free to correct! DIF 41 4868A C5?? 3417 Here are the links to...
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