Steering Problem-Gearbox-PS
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New User
Joined: Aug 2006
Posts: 5
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Steering Problem-Gearbox-PS
Hello all, I have a 92 150, 5.0L. Got the truck with no powersteering.
Replaced PS pump, bleed the system with truck on jacks, no fix.
Cracked open the return line on the gearbox, lots of fluid everywhere.
Refilled, rebleed, lock to lock, NO FIX!!
This may sound stupid, but does that mean the gearbox is bad? Any other checks that I can perform?
Rebuild? Replace? the gearbox.
And can someone explain the basics of how the gearbox works? In conjuction with the PS pump.
Thank you for any assistance.
MM.
Replaced PS pump, bleed the system with truck on jacks, no fix.
Cracked open the return line on the gearbox, lots of fluid everywhere.
Refilled, rebleed, lock to lock, NO FIX!!
This may sound stupid, but does that mean the gearbox is bad? Any other checks that I can perform?
Rebuild? Replace? the gearbox.
And can someone explain the basics of how the gearbox works? In conjuction with the PS pump.
Thank you for any assistance.
MM.
Elder User
Joined: Dec 2002
Posts: 559
Likes: 0
From: South Carolina
The Ford truck P/S gearbox is a saginaw recirculating ball design, which uses a spool valve to divert high pressure fluid from the p/s pump for the purpose of power assisted steering. As you turn the wheel, the valve opens on that side of the gearbox and high pressure fluid does the rest. Unfortunately, it is really a specialist item when it comes to repair and rebuilding. Because of the high risk of something binding if you set the clearances improperly, it's best to replace the gearbox with a reman unit if it is not working. Basically, If the pump is good, then there is only one other working part in the p/s sytem - the gearbox. Fortunately, it's not a difficult repair. Three large bolts to retain the box, two hose connections, one drag link connection, and a bolt in the steering shaft.
