A4 = 700r4?
Le Mans Master
Joined: Jul 2005
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The A6 is called the 6L80E. As a reference point, the Turbo 400 was renamed the 3L80 which puts it on par with the strength of a Turbo 400.
Thread Starter
Melting Slicks
Joined: Jan 2004
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From: West Coast
The 2005 C6 A4 is basically the 700R4. The 700R4 was renamed the 4L60 when GM went to an alpha-numeric designation for all transmissions. The "4" refers to the number of forward gears, the "L" refers to longitudinal orientation ("T" refers to transverse orientation), the "60" is a relative strength indicator, and the "E" means its electronically controlled. The A4 in the C6 is called a 4L65E which means its beefed up over the 4L60E to handle the higher torque of the LS2. The 4L60E is rated at 360 lb-ft and the 4L65E is rated at 400 lb-ft, so its not exactly the "infamous" 700R4.
The A6 is called the 6L80E. As a reference point, the Turbo 400 was renamed the 3L80 which puts it on par with the strength of a Turbo 400.
The A6 is called the 6L80E. As a reference point, the Turbo 400 was renamed the 3L80 which puts it on par with the strength of a Turbo 400.
I always knew and heard that the 700R4/4L60E were not that great when it came to handling power/torque. 
I'm glad GM finally came out with a stronger auto. Man, the Turbo 400 was a beast, that thing handled almost anything you can throw at it.
A buddy of mine has a muscle car that makes around 550HP/600LBS Torque and it has a stock Turbo 400 and even after hundreds of hard 1/4 mile runs and tens of thousands of miles, it hasn't skipped a beat.Hopefully the 6L80E is as reliable.
