I have a 2000 Excursion with a 7.3L. I have an Airaid Intake and my tire size is 325 75R16. My wheels are also 10" wide. I've been through 3 power steering pumps since I've put these tires and rims on. My Ex is currently sitting in the shop at the local Ford Dealership trying to figure out why my latest pump went out nearly 24hrs after installation.
Local shop (not Ford) told me this,
"It's your gear box. It's over heating because it's going bad and causing your pump to go bad as well. It will cost $497 to replace."
How do I fix this problem? I've been told to upgrade the pump. Then I was told that won't help. I was told to change the pulley and make the pump work harder. Then I was told that will burn up the pump faster.
What have you all done to yours? Or have you heard of this happening before?
ukmat71- It depends on how far gone your pump is. It starts with the steering getting incredibly difficult to turn unless your on the roll. You should also hear a whine when you turn. Eventually you'll lose power brakes as well. Of course, for an Excursion, that's not a good thing at all.
ReAX- I'm not having those issues at all. It's definitely my power steering pump. I just don't understand why I've gone through so many. I don't hear of other lifted trucks having these problems.
I just had to replace my PS fluid because I had no power assist on concrete while stopped. It's mostly come back, but I suspect it's getting close to pump time. What kind are you using as the replacements (this can have a big impact)?
A1 Cardone is usually pretty good reman, but those new china units can be iffy.
mmmm cheers guys, may be i have some crud in my fluid then , as it really is only now and then , i usually kick the gas for a second and its cleared.
i'll try to flush the system out soon and see it that makes a difference.
back on topic now
just noticed you said lifted truck , could this be a problem with the steering rack binding as the angle will be different from the point where it meets the steering wheel (sorry cant think of the word but you know what i mean, hopefully)
pinion i think , yes rack and pinion , if you have lifted it i would imagine that the steering rack has got to be adjusted somehow to accomodate for the greater angle as the wheels are lower than the body.
00 Excursion XLT 4x4 6.8 V10 for family
96 Mitsubishi Lancer Evolution 4x4 GSR for fun
Our platforms don't use the rack and pinion style steering. It's a gear box with a pitman arm and drag links. The sharper the angle on the drag links, the more force it takes to push the spindles. However lift kits over 4" usually either come with or recommend a drop pitman arm to correct this to some degree, it's not a fix but more of a bandaid that works decently.
The fact is, big tires and lifts make things difficult for the power steering system. I'm only running 315/75r16s on stock wheels and my fluid only last a couple of years. My truck does have a power steering fluid cooler and I've considered upgrading it to a full sized transmission cooler.
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