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6L80 vs 6L90 for turbo LY6

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Old 02-27-2013, 08:33 PM
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Default 6L80 vs 6L90 for turbo LY6

I was under the impression that my 08 Silverado 4x4 LY6 donor came with a 6l90? After some digging around Im not so sure...

- Can someone verify what is behind the 6.0 in this truck?

Assuming the worst and it is a 6L80, how will this live behind the 6.0 when I put the boost to it? This is going into 85 1.5-ton 4x4 truck, so not light, with big tires/lockers/4.56:1/37-40" tires, so hooking good.... Running a 90lb/min HX52 and looking to dial in somewhere around 600whp.

- Will the 6L80 live?
Old 03-03-2013, 12:41 PM
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My 08 Silverado LY6 was 2wd and came with 6L90. If you bought at a a dropout, it should be a 6l90. Cars got 6l80s.
Old 03-03-2013, 05:39 PM
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My 2010 5.3 Sierra RWD has the 6L80e.
Old 03-04-2013, 02:29 PM
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It is in fact a 6L90. Thanks guys.



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