Can I use transmission fluid for Pump

Can I replenish my hydraulic pump with Automatic Transmission fluid?

Thanks!!

If it has brake fluid in it now do not mix it with transmission fluid. It will ruin the rubber parts in the hydraulic cylinders.

My 65 uses trans fluid.

You can use ATF in a power steering pump; but I would rather use PS fluid. It is cheap and available at every corner auto parts store. You should not use brake fluid in a power steering pump.

Big Dave

To clarify, my 65 uses trans fluid in the convertible top pump, power steering fluid in the PS pump. ;)

I would use P/S fluid for the power top pump as well as you do not need the red dye or heat fighting agents found in the ATF.

Big Dave

FLUID-Most cars 1967 and newer use automatic transmission fluid, from 1962-67 they may have used either automatic transmission fluid or brake fluid. Brake fluid can be detected by its pungent odor and transmission fluid smells more like oil. Pre 1962 cars almost always came with brake fluid but should be checked because the type of fluid in the system may have been changed, mixing the types of fluid may result in parts failure. If you are replacing the complete system, the use of automatic transmission fluid is recommended, never use silicone brake fluid.

Thanks all for the input!!