Can you use motor oil in these systems? Like my 359 Pete does? Thanks, LB
Shepard said 15W-40. Ross said ATF. I have seen both work on most anything. Some GMC's back then used a Saginaw and possibly another brand. Those spected power steering fluid. Any other product will take the seals out of them.
Power steering fluid if a GM pump/gear, as noted Ross boxes specified ATF OR P/S Fluid oils.