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The shim between the inner bearing and the pinion is critical and if it's lost you need special tools to set the pinion depth. replace the bearings and seal with an new crush sleeve thighten the pinion nut until the sleeve crushes and you can't move the pinion up and down. Then very slowly tighten the pinion nut checking the rotational torque. You will need an inch pound torque wrench, when the preload is correct it should take between 20-25 inch pounds of torque to rotate the pinion. If you get it too tight you need to replace the crush sleeve and start over. Proper bearing preload and gear mesh are critical.

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โˆ™ 2007-07-15 17:25:26
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Q: What is the preload on the pinion bearing and the backlash on the crownwheel and pinion inside the rear differential of a 1997 ford explorer 4 wheel drive?
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