75 Power Steering gear box fitting size

[rojo23]

What size are the fitting needed for a 75 ps. gear box. One looks like it is 5/8-18, is the other is larger than 1/2" so is it 9/16-18? 5/8" would only thread into one of the holes, if the high pressure the larger of the 2. thanks

 

[DirtDonk]

Can’t remember the fitting sizes off the top of my head, but I have a chart, so will check that when I have a moment.
High pressure is always to the front on every American gearbox that I’m aware of.
By front I mean the furthest away from the input shaft seal.

 

[DirtDonk]

Here ya go.

High-Pressure (front) 11/16 x 18
Low-Pressure/Return (rear) 5/8 x 18

And just for the record:
Input Shaft Size - 13/16 x 36 spline.

Paul

 

[thegreatjustino]

if the high pressure the larger of the 2

The pressure port is the one closest to the front of the Bronco. Return is the closest to the firewall.

 

[rojo23]

thanks for the info