GMT 900 Trucks General Discussion 2007 - 2013 Trucks | General Discussion

How strong is the 6L80?

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Old Apr 4, 2010 | 03:42 AM
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Default How strong is the 6L80?

Do you believe a 2WD 6L80 can survive putting down ~500hp to the wheels without blowing its guts?

Any of you guys putting down big numbers behind this tranny please chime in!

Thanks
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Old Apr 4, 2010 | 06:55 AM
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I think the weight of the vehicle and the traction will play a huge role in this as well.
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Old Apr 4, 2010 | 07:38 AM
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Maybe Vince will chime in.
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Old Apr 4, 2010 | 12:50 PM
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I'm curious about this as well, I haven't heard or seen anyone beef these up thoroughly just yet.
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Old Apr 4, 2010 | 04:47 PM
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I've never heard of any "built" 6L80s so thats why I'm curious as to how much hp these trannies can handle.
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Old Apr 4, 2010 | 05:23 PM
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My 4l80e has a shift kit racing clutches and making around 500hp and close to 600lb tq.
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Old Apr 4, 2010 | 05:51 PM
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Originally Posted by 53RUSSELL
My 4l80e has a shift kit racing clutches and making around 500hp and close to 600lb tq.
6l80 not 4l80e lol
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Old Apr 4, 2010 | 06:34 PM
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Circle D is fixing them up now, there are quite a few stock 6l80es over 600rwhp in the G8s which are heavy cars so Id think 500 shouldnt be a problem atleast for a while.
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Old Apr 4, 2010 | 07:26 PM
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They are probably somewhere in between the 4l60e and 4l80e in terms of strength. JamesB made a detailed post a couple years ago comparing the 6l80e to the 4l80e and according to him the 6l80e has intrinsic deficiencies in terms of power handling compared to the 80e.
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Old Apr 4, 2010 | 09:29 PM
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What is circle D doing to these trannies?

The reason Im asking is because im planning on swapping in the 6.2 then s/c it soon after into my nnbs rcsb. I did plan on doing it this spring break but the only thing holding me back is the 6L80. Ive been waiting and searching to find a 6L90 but w/o luck.

Its going to be my DD so I want to know it wont suddenly go out on me. Not really looking for the truck to be beast or a 1/4 mile monster, just want the truck to be able to defend itself against a couple of unsuspecting srt8s an lightnings.
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