Firebird V8-305 5.0L (1982)
Fig. 4 Model 605 power steering gear disassembled
There are two types of Saginaw Rotary Valve steering gears and can be identified by the configuration of the side covers. The Model 605 gear has a
round side cover, secured with a retaining ring, Fig. 1. The Model 800-808 gear has a rectangular side cover, secured with four bolts, Fig. 1. Also, note
that the Model 800-808 gear incorporates balls in the rack piston, Figs. 2 and 3, while the Model 605 gear does not, Fig. 4.
The power steering gear operates entirely by displacing oil to provide hydraulic pressure assists only when turning. As the entire gear assembly is
always filled with oil, all internal components of the gear are immersed in oil, making periodic lubrication unnecessary. In addition this oil acts as a
cushion to absorb road shocks that may be transmitted to the driver.
The steering shaft, hydraulic valve, worm and rack piston nut are all in line, making a compact and space saving steering gear. All oil passages are
internal except the pressure and return hoses between gear and pump.
