Compatability Issue 4L80e

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May 14, 2015 | 11:19 PM

dirtft64

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Compatability Issue 4L80e

Im needing to get a 4l80e for my 5.3 Gen III 2001/1968 C10 I had read something about in 2004 the computers changed and I need to stay within 2000-2003 model 4L80e. I running factory pcm with reprogramming to run the 4L80e. I can find locally 2004+ models but not within my PCM years. Not sure what to do. Cam this PCM be programmed for the later models?

May 15, 2015 | 07:41 AM

JRENIGAR

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What did you read? I have an 06 model 4l80 and Im having issues with the TCC lockup just unlocking due to reading a slip that I dont think is really there.

May 15, 2015 | 09:15 AM

tiznodd

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I'm running a 2005 4l80e with a 2003 PCM and am having no issues.

May 15, 2015 | 04:08 PM

dirtft64

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Thats good to hear. I actually found a 2001 4l80e today that should be a perfect match for $400.00 that needs rebuilt. (no problem here yet) BUT I am needing a slip yoke not a bolted yoke. The trans I got is short splined and bolted. Anybody know the proper output shaft I need?

May 15, 2015 | 04:16 PM

dirtft64

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From: Texas

JREN
I know the earlier models were fielding thru the plug the the trans case causing issues. I would unplug the trany plug and check the connection pins.

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