Quote:
Originally Posted by DorkMissile
The expansion of steel is pretty consistent. 6 millionths of a inch for every inch per degree.
.002” of interference fit will require 1400 degrees of temperature change to get a .250” dowel pin in a .248” hole.
As far as interference fit goes, for shear strength, .002” fit is no stronger than .0002”. There is more axial grip (force trying to pull/push the pin in and out of the hole), but a shear force will be no stronger.
I understand that the 1LE diff is bolted, but the case is entirely different. The standard SS case is two piece, the 1LE is three piece. And the 1LE case is not split right down the center of the pinion case like the SS case. And to me, it looks like the 1LE case is possibly nodular, not ductile iron.
The article I saw said that the SS rear end suffers from the pinion gear wanting to “wedge” the case apart, hence the three piece (one piece center) of the 1LE setup.
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Guy knows his shit lol, I am a toolmaker by trade and what he says is true!
you are not going to shrink a dowel 0.002" in the freezer