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Old 07-18-2014, 09:13 AM   #1
FenwickHockey65
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GM Confirms 8L90 8 Speed Automatic Transmissions for 2015 6.2L K2XX Trucks/SUVs

2015 Chevrolet and GMC Pickups, SUVs to Offer Eight-Speed Transmission
General Motors

July 18, 2014

DETROIT – Chevrolet and GMC have confirmed a new eight-speed automatic transmission will be standard on 2015 Chevrolet Silverado, GMC Sierra and GMC Yukon Denali/Yukon XL Denali models equipped with the 6.2L EcoTec3 V-8.

The GM-developed Hydra-Matic 8L90 eight-speed is approximately the same size and weight as the Hydra-Matic 6L80 six-speed automatic. Its 7.0 overall gear ratio spread is wider than GM’s six-speed automatic transmissions, providing a numerically higher first gear ratio to help drivers start off more confidently with a heavy load or when trailering. The 8L90 also enables numerically lower rear axle ratios, which reduce engine rpm on the highway.

With 420 horsepower and 460 lb.-ft. of torque, the 6.2L EcoTec3 V-8 is the most powerful engine offered in any light-duty pickup, and offers a maximum available trailer rating of 12,000 pounds, based on SAE J2807 Recommended Practices. As with other EcoTec3 engines, it seamlessly switches to four-cylinder operation under lighter loads to improve fuel economy.

Additional technical details and the EPA estimated fuel economy will be announced closer to the start of production in the fourth quarter of 2014.
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Old 07-18-2014, 10:14 AM   #2
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Wasn't GM working with Ford on a 8 Speed trans, or was that the 9 and ten speeds?

Either way thats a good move for GM. I would be shocked if Ford didnt offer a 8 speed in the F-150 in a year or two
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Old 07-18-2014, 10:16 AM   #3
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Quote:
Originally Posted by shaffe View Post
Wasn't GM working with Ford on a 8 Speed trans, or was that the 9 and ten speeds?

Either way thats a good move for GM. I would be shocked if Ford didnt offer a 8 speed in the F-150 in a year or two
Co-development of 9 and 10 speeds has been underway for a while.
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Old 07-18-2014, 03:32 PM   #4
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Now to wait for this to trickle down to 5.3L and 4.3L models...
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Old 07-18-2014, 03:37 PM   #5
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Dose dodge have a 8 speed auto in the trucks
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Old 07-18-2014, 03:40 PM   #6
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I believe it is optional on the Ram
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Old 07-18-2014, 03:42 PM   #7
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Old 07-18-2014, 04:30 PM   #8
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Quick, put an 8 speed into the new Canyon!
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Old 07-27-2014, 04:03 PM   #9
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Not right at first they won't, it would be too much of an improvement and it would be harder for them to sell additional vehicles...they trickle down and out the tech to continue to sell vehicles
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Old 07-27-2014, 04:50 PM   #10
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Dose dodge have a 8 speed auto in the trucks
The 8 speed is standard on the V6 and Diesel and $500 option for the Hemi, depending on trim. On some of the higher trims the 8 speed is standard with the Hemi.
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