Explorer 2WD V6-245 4.0L (1994)
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Do not replace the shaft and control assembly unless the hiss is EXTREMELY objectionable.
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A replacement valve will also exhibit slight noise, and is not usually a cure for the complaint.
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Any metal-to-metal contacts, such as column grounding, coupling grounding, or sheet metal to steering components will transmit valve hiss
noise into the passenger compartment.
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The only service that can be performed on the 3D517 valve assembly is the replacement of the four valve sleeve O-rings on the valve sleeve
and replacement of the control valve housing.
Disassembly
Remove the Teflon piston seal and O-ring from the piston and ball nut. Discard both seals.
Assembly
1. Dip anew O-ring in Standard Transmission Lubricant (SAE-8OW) D8DZ-1C547-A (ESP-M2C83-C) or equivalent and install it on the piston and
ball nut.
2. Install a new Teflon piston seal on the piston and ball nut being careful not to stretch it more than necessary.
