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4l80e converteer and flex plate differences by year???

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Old Apr 28, 2012 | 01:43 AM
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Default 4l80e converteer and flex plate differences by year???

I'm running into a few questions when selecting a converter and flywheel for my application. I have a 99-2000 lq4 and I have the engine just about built, and I have the 4l80e done as I've built before. I'm wondering if anyone can tell me where the difference is between the converter and flywheel on the 99-2000 crank. The crank hub is .400 taller then the ls1 and I'm curious to know weather any ls1 style converter will work with a flat flywheel or do i need a different converter? I know their is a flange on the ls1 style 4l80e flex plate is that my only difference? Thanks for the help guys.
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Old Apr 29, 2012 | 09:30 PM
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If you have the longer crank, you have to use a 4L80E style flexplate without the spacer (the extra length replaces the spacer).
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Old May 12, 2012 | 03:05 PM
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im runnin into the same problem, i got a 4l80e flexplate without the spacer and the converter holes dont line up. so is there a flat flexplate that will work for an ls1 converter?
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Old May 15, 2012 | 09:40 AM
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hate to hijack but i didnt want to make another thread...

I just bought a 4l80e and I have a 04 LM4 ( i dont know the crank size, has the 3 converter mounts)

What is the simple/cheaper solution. Spacer, yokes, harness and plate or Sell it at profit and get a 4l60e?
Hate to be this cheap but im building an entire car. <<<<<<<<<<<<<<<<

Last edited by windsma; May 15, 2012 at 10:13 AM.
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