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99 2000 long crank work with 4l65e

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Old 09-11-2012, 06:13 PM
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Default 99 2000 long crank work with 4l65e

I got the block out of a 99 HD2500 and would like to use the crank in it but noticed it has a longer rear seal.
Old 09-13-2012, 08:01 AM
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Nobody familiar with the longer chank with the early Ls series 4l80e?
Old 09-13-2012, 08:05 AM
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Does it have the spacer or the long crank? Post a picture.
Old 09-13-2012, 08:09 AM
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Are there 6 bolt holes or 8?


Old 09-15-2012, 12:51 PM
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I know it's not a spacer I got the one out of my 99 z28 and compared them and the rear snout is a half inch longer. I don't recall the bolt holes but believe I would have noticed that. They are at the machine shop now or I'd post a pick. Looks like the TC had 5 bolts on the truck and 3 on the car. Flex plate look like I could drill out 3 of the 5 hole and use the long crank with it if the overal length is the same.
Old 09-15-2012, 02:56 PM
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Those early 4L80 equipped cranks were longer to work with the 4L80 trans. Then GM figured out it was cheaper to make just 1 crank and just use a spacer on 4L80 vehicles.

You might be able to have a custom converter made to allow you to use the long crank with a 4L60, or maybe make a spacer to go between the engine and tranny?



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