THE six-speed manual gearbox is exclusive to V8-engined utes and is the standard transmission on the SS. The SS is available with Holden's electronic four-speed automatic transmission, which incorporates power or economy modes. Both manual and auto gearboxes use the same final drive ratio as V6 models (3.46:1 manual and 3.08:1 auto) and both have a limited-slip differential to assist traction in slippery conditions.