4L80e trans swap?

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Apr 29, 2008 | 04:45 PM

gen3performance

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From: Southern WI

4L80e trans swap?

I was just wondering if any 97 and newer 4l80e will bolt to an LS series engine? Or does it have to be a 97 and newer LS specific?

Apr 29, 2008 | 04:50 PM

thunder550

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Nope, any of them will bolt up. The earlier models are missing the top center bolt flange but will still work.

Apr 29, 2008 | 04:53 PM

gen3performance

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Can it be drilled out? or is there just not a flange there

Apr 29, 2008 | 05:00 PM

Stoichiometric

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The casting on the bellhousing is not flat where the bolt needs to go through. Seems like many have run the older trans without using the top bolt.

Apr 29, 2008 | 05:02 PM

ZZebes

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Top bolt not really necessary, hell i ran my 4l60e without one forever cause i'm lazy and have huge hands

Apr 29, 2008 | 05:54 PM

nonnieselman

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Basically all you need is the 4 bolts around the Dowel Pins....
Only reason i have 5 bolts in the 80E is cause i used one to put a zip tie on to hold some wires up and out of the way....

Jun 12, 2008 | 06:38 PM

gen3performance

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What about electronics and harnesses. Will there be a problem if I use a 4l80e from a 1998 or a 1995. Or are they all the same.

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