4L80E Transmission

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4L80E Transmission

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Chevrolet >> Chevy Trucks, Vans & SUV's >> Silverado >> 4L80E Transmission

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4L80E Transmission - 9/16/2007 8:51:35 PM

scott_mckinney

Posts: 299
Joined: 8/29/2006
From: Chesterton, IN
Status: offline

Hey Guys. The stock transmission found in the new Duramax trucks, the automatic 4L80E... How much power can the stock unit handle? Horsepower and torque? Please advise.

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Scott McKinney
Scott@GoSMM.com

Post #: 1

RE: 4L80E Transmission - 9/17/2007 12:34:02 AM

kcb37

Posts: 504
Joined: 7/3/2006
Status: offline

The automatic in the Duramax's are allisons. They should be able to handle 400 or 500 horse if I remeber correctly.

(in reply to scott_mckinney)

Post #: 2

RE: 4L80E Transmission - 9/18/2007 10:30:17 AM

melat70

Posts: 28
Joined: 8/8/2007
Status: offline

I agree with Scott, that you do not have a 4L80E tranny. They were used in the pre Duromax and pre 8.1 engines. I don't know if some version of it is still used in the smaller engines. It was a good tranny, but no wheres near the Allison. If you have a Duromax you have the best of engine tranny combo. If you plan to hop up the Duromax, try one of the after market kits advertised, as they have been tested with the Allison and should be a good bet.
Mel

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Mel

(in reply to scott_mckinney)

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RE: 4L80E Transmission - 12/16/2007 2:48:01 PM

scott_mckinney

Posts: 299
Joined: 8/29/2006
From: Chesterton, IN
Status: offline

Hi. I want to know about the factory 4L80E...

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Thanks
Scott McKinney
Scott@GoSMM.com

(in reply to melat70)

Post #: 4

RE: 4L80E Transmission - 12/17/2007 3:28:52 PM

ZX1100F1