4L80E Rebuild Question

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Feb 19, 2012 | 05:22 PM

mbaker3

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From: Lakeland, Fl

4L80E Rebuild Question

Tearing down a 2000 4L80E and the forward clutch housing is very discolored. I have never torn one down before so I am not sure if that is normal or not. Is it heat damage, or ??? Any guru's out there that can comment. Does it need changing?

Feb 19, 2012 | 06:06 PM

chris718

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That discoloration of the metal is a result of heat treating the internal ring gear teeth to 62 rockwell to a depth of .025 and then the result of maximum material core yeild.

Feb 20, 2012 | 07:32 PM

mbaker3

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From: Lakeland, Fl

Thanks........... it had an unusal pattern towards the center of the heat affected zone and it looked like it may be from overheating the internals.

Feb 20, 2012 | 07:50 PM

chris718

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The pattern actually makes sense from a mechanical stanpoint.The less material there is at the saturation point the more the color changes.Look at it objectively now and you will understand the pattern.

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