1988 - 1998 (GMT400) Section for all discussion related to the 1987-1998 Chevrolet and GMC trucks.

Power Steering Box Threads

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Old Apr 14, 2016 | 11:09 AM
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Jacob Orrico's Avatar
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Default Power Steering Box Threads

Hello! This is my first thread.
I'll get straight to the point, my truck was leaking power steering fluid through the gearbox, so I replaced the gearbox altogether. After installing it with no problem, I plugged in the lines and one of them cross-threaded, resulting in me needing a new pressure line. I don't think the threads on the box are destroyed, but it is possible. So let's just assume it is, in that event, is it possible for me to tap/dye the inside of the power steering. I would likely need a pipe threader, which is fine, but my concern is whether or not I could get a pipe bolt to fit on the power steering box. Any other suggestions are also welcome, I'm a bit stumped and I don't want to buy a new steering box again, but I'm afraid that may be what it has to come to.
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Old Apr 14, 2016 | 11:34 AM
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I think I would go to the hardware store and get a brass fitting that matches the threads on your pressure line. Carefully try to get it threaded in straight and regroove the threads. Brass being softer than steel it won't further damage the threads.
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Old Apr 14, 2016 | 4:18 PM
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Originally Posted by burnhedge
I think I would go to the hardware store and get a brass fitting that matches the threads on your pressure line. Carefully try to get it threaded in straight and regroove the threads. Brass being softer than steel it won't further damage the threads.

Will do! I'll give it a try. Is there anybody who knows the thread pitch that it's set at?
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Old Apr 15, 2016 | 8:26 AM
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Got the hose in with absolutely no leaks. I used a spark plug tap, believe it or not, and gently used it to rethread the steering box hose thread. Worked perfect. Steers like a champ now.
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Old Apr 12, 2025 | 4:28 PM
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Originally Posted by Jacob Orrico
Got the hose in with absolutely no leaks. I used a spark plug tap, believe it or not, and gently used it to rethread the steering box hose thread. Worked perfect. Steers like a champ now.
what size did you use by chance im having a problem now specs online say m18-1.50 or m16-1.50
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