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4L60E or 4L65E

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Old 06-27-2014, 11:43 AM
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Default 4L60E or 4L65E

I have an LS2/4L6xE dropout from an '06 GTO. I thought all along that the tranny was a 4L60E, but I've been doing some reading lately that says the later GTO's had the 4L65E.

Does anyone know for sure what came in the 2006 GTO?

How do you identify a 65 versus a 60?
Old 06-27-2014, 01:00 PM
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It's an 65e
Old 06-27-2014, 01:24 PM
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Whats really the difference on them?
Old 06-27-2014, 01:58 PM
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Originally Posted by high n dry
Whats really the difference on them?
The 4L65e has 5-pinion planets, 7 (instead of 6) frictions in the 3/4 clutch and a hardened input shaft.
There is no way to tell the difference from the outside; the case number is the same, etc.

Around 2003 GM made a few strength improvement to all 4L60E/4L65E, including a hardened sun shell.
Old 06-27-2014, 02:00 PM
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Originally Posted by sb50
It's an 65e
Well, that's a relief. Maybe I can go a little longer without worrying about a rebuild.



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