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I have a 2003 5.3 what year 4l60e or 4l80e

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Old 02-19-2017, 08:07 PM   #1
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Default I have a 2003 5.3 what year 4l60e or 4l80e

I'm just looking for what will work without having to do any tuning first ls swap here guys
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Old 02-20-2017, 04:03 PM   #2
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I would go for something out of Silverado 99-07 or express van. U didn't say what u have with the 5.3 but 03 motor probably is DBW. So therefore u will need tac box and gas pedal. If u want heavy duty u probably want the 4L80E. It is physically bigger than 4L60E as well.
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Old 03-01-2017, 02:30 PM   #3
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2003 5.3L was usually backed with a 4l60. Just putting another behind it would be the easiest. Or could upgrade with a harness and shift box to the 4l80. Just swapping engines without major modifications I would just go 4L60.
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