GM press release:
A glimpse of the Chevy SSR almost immediately brings to mind the fun of an American street machine. And a when you think of an American street machine, there's a good chance it's powered by a GM small block V8 engine.
The Chevy SSR will carry on the small block legacy, powered by a new version of the Vortec 5300 V8 engine. This new version of the Vortec 5300 (5.3L/5328cc) features an aluminum block, a first for this engine.
The Vortec 5300 today is used in GM's full-size trucks. The current version features an aluminum cylinder head and a cast iron block. The SSR will be the first vehicle equipped with the aluminum block version of the Vortec 5300.
Testing and calibration of this new version of the engine for use in the Chevy SSR is ongoing. As a result, final horsepower and torque numbers are not yet available. In its applications in full-size pickups and SUVs, the Vortec 5300 produces peak horsepower of 285 @ 5200 rpm with peak torque of 325 lb.-ft. @ 4000 rpm. These numbers for the full-size truck applications of the engine may vary for the aluminum version used in the SSR.
Displacement: 5.3L (5328cc)
Compression Ratio: 9.5:1
Valve Configuration: Overhead valves (2 valves per cylinder)
Firing Order: 1 - 8 - 7 - 2 - 6 - 5 - 4 - 3
Bore x Stroke: 96.01 x 92.00mm
Materials: Block - Cast Aluminum Cylinder Head - Cast Aluminum
Assembly Sites: Romulus, Mich. & St. Catherines, Ontario, Canada
Just as the small block V8 provides a heritage of power, the SSR's transmission is a proven performer. The transmission for the Chevy SSR will be GM's Hydra-Matic 4L60-E an electronically controlled four-speed rear-wheel-drive automatic.
The 4L60-E features automatic overdrive and a torque converter clutch, with a case made of die cast aluminum. It provides smooth and strong power delivery, and is used on a wide variety of powerful GM vehicles including Chevrolet Corvette, TrailBlazer and Camaro.
Type: Hydra-Matic 4L60-E (M30)
Four-speed rear-wheel-drive, electronically controlled, automatic overdrive transmission with a torque converter clutch
Gear Ratios: 1st: 3.059
Case Material: Die cast aluminum
Assembly Sites: Toledo, Ohio, Romulus, Mich., Ramos, Mexico