I prefer to use GM parts when possible. I have had problems with Ratech crush spacers before. I had one split right down the seam. Had to disassemble the rear end again to change it. There are some that are only made by Ratech, so you don't have a choice. The Strange spacer was probably a GM spacer. I'd like to see more than 160 foot pounds of torque on the nut. That just isn't quite enough. Should be at least 200 or more.
Crush collar won't crush
Putting together a 12 bolt. Put in a new Ratech #3111 crush collar and got up to 300 ft/lbs on the pinion nut and couldn't get more than 10 in/lbs of preload. Was afraid to go any further for fear of stripping pinion nut. Took out that crush and got new one from Strange. Compared the 2 with a mike and the Raytech was .020" longer. Put in the Strange and got the recomended 18 in/lbs preload at 160 ft/lbs on the pinion. Anybody run into this?
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