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How To Replace Power Steering Gear Box 64-73 Pontiac GTO

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  1. step : Disconnect the Lines (1:00)
    • Place a drip pan underneath the lines
    • Remove the bolt from the pressure line with an 11/16 and 5/8 flare wrench
  2. step : Disconnecting the Steering Flange (1:45)
    • Have a person hold the steering wheel
    • Remove the bolt from the steering flange with a 1/4 and 9/16 inch wrench
    • Turn the steering wheel 180 degrees
    • Remove the bolt from the steering flange with a 1/4 and 9/16 inch wrench
  3. step : Removing the Steering Box (2:49)
    • Remove the Pitman arm nut with an impact driver
    • Seat the Pitman arm puller to the bolt
    • Remove the bolt with an impact driver
    • Remove the three 5/8ths bolts from the gear box
    • Pull the steering box out
  4. step : Preparing the Steering Box (4:06)
    • Remove the 12-point bolt on the old steering shaft
    • Remove the bolt from the new steering shaft
    • Line up the flat spot on the flange with the flat spot on the steering box and connect them
    • Remove the two bolts on the steering flange
    • Turn the steering all the way to the right
    • Turn the steering to the left just under three full turns
    • Turn the steering to the right 1 and just under 1/2 turns
  5. step : Installing the Steering Box (7:04)
    • Line up the steering flange and Pitman arm
    • Insert one bolt into the steering box to keep it in place
    • Feel the larger bolt through the steering shaft
    • Tighten the other two bolts onto the steering box
    • Torque the bolts to 75 foot-pounds
    • Tighten the Pitman bolt
  6. step : Connecting the Steering Flange (9:16)
    • Have a person turn the steering wheel
    • Place the nut on, tighten it, back it off, place the lock washer on, and place the nut on
    • Rotate the wheel 180 degrees
    • Place the nut on, tighten it, back it off, place the lock washer on, and place the nut on
    • Torque the bolts to 30 foot-pounds
  7. step : Connecting the Lines (10:58)
    • Remove the plugs from the steering box
    • The larger line goes towards the inside of the car
    • Route the other line between the bolt and line
    • Check and tighten the lines
    • Insert and tighten the pressure line fitting in place
    • Insert the hose on the fitting
    • Clamp the band clamp with pliers
    • Torque the Pitman arm bolt to 140 foot-pounds
    • Fill the reservoir
    • Start the vehicle
    • Fill the reservoir again
    • Repeat the process twice until the steering wheel and move easily
    • Check the reservoir after the first few times the car is driven

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Hi, I'm Mike from 1A Auto. I hope this how-to video helps you out, and next time you need parts for your vehicle, think of Thanks.

In this video, we're going to show you how to replace the power steering box on this 1966 Pontiac GTO. The items that you'll need include 5/8 inch and 11/16 inch flare wrenches, 1/2 inch and 9/16 inch wrenches, 7/16 inch socket and ratchet, 1-3/8 inch socket and impact driver, drip pan, flat blade screwdriver, pry bar, Pitman arm puller, torque wrench, and jack and jack stands.

This procedure is basically the same although tools may differ for any GM vehicle that uses this style power steering gear and that can be from the late 50s up to the early 80s.In the first step you need to disconnect the lines from the pump to the steering box and I've got a flare wrench. It's 11/16 and 5/8, and I'll do the pressure line first. I have a drip pan underneath because as soon as I do this it's going to squirt out fluid. You're going to want to undo the steering flange, so the bolt with a nut on it right here and you can see my new one here, bolt and nut.

You want something in the car to hold it while you're doing this, and then you'll turn the steering wheel 180 degrees and undo the other one. I've got somebody in the car holding on to the steering wheel, half inch on this one. Once they come loose, you'll probably need another wrench to hold the bolt while you undo the other one.

We're going to remove the Pitman arm bolt, and you can do this by hand. Basically, you'd pull on it. It'll just turn the steering, but the easiest way is to use an impact driver. You just separate the Pitman arm from the box with a Pitman arm puller. Put it on there and it gets seated. Now, remove these three 5/8 bolts. All right, so the owner of this car wants the correct 12 point bolt on the new coupling so take it out. Then take out this incorrect bolt. We're just going to leave it out for now, just to make sure it fits in there. It does. Just leave it out for now.

There's a flat spot on the shaft here, and the coupling has a flat spot. If you need to widen out, put a large screwdriver in there. Put it in a vice, pull the screwdriver to widen that a little bit, and just make sure that you wind up with the flat spot in the coupling with the flat spot on the box. I'm going to tighten this preliminarily for now. I'll tighten it all the way up once everything is installed. Just remove these two bolts. We're going to want to center the box so I can turn the steering box all the way to the right, and then we'll count its range going to the left, half, one, one-and-a-half, two, two-and-a-half, and it's just a little more than a little less than three. If we go back one or half-one, and then just a little less, that should be centered right there. We can see that these marks are pointing straight forward and straight across which is lined up with our Pitman arm.

I'm looking up, and I've got my larger bolt here, smaller bolt and my larger bolt is on that side, and my smaller bolt hole is on that side so that all looks good. I'll put the box up and in. I'm not so worried about it being connected yet. With it partially up in I'm going take my lowest bolt here which is easiest for me to see. I could see it coming through the frame on the other side. Put the box in to my Pitman arm, and if you can try and wind up. I'm trying to get it into place and get this bolt started and I've got that. I'm just going to drive this bolt in a little bit so I know it's well seated there. After that, actually I can feel my larger bolt through the steering shaft, so that's good.

Now, I'm just going to put the last two bolts on here, tighten them up, and then put my Pitman arm bolt back on here and tighten it up. Torque this to 75 foot-pounds. This small bolt is still kind of sticking through, so I should just move it around the steering shaft a little bit. It's going through it just needs to be turned.

Okay, so you can have your friend to get back in the car and turn the steering wheel so we can get the nuts on. These have lock nuts, but you could see they're just barely through. What you can do is actually put the nut on, tighten it up, back it back off, put the lock nut on, and put the nut back on. Tightening it up pulls that bolt through some so it's easier to get the lock nut on and the lock washer.

All right, we're just going to check this bolt even though we didn't loosen it. It's a good idea. Make sure it's nice and tight, and then we're going to turn the wheel. We're looking at this one and tighten it right up. We'll torque this to 30 foot-pounds.

Take the plugs out of the steering box. You can't really hook this up incorrect because one fitting is larger than the other, but a larger line goes towards the inside of the car. You want to make sure that you route this one up here, you want to go right in between where this is wide in this bolt, so you have as little heat as possible. I'm getting close to that line. Make sure you check and tighten up the other end of the line as well. Here's our little pressure line fitting.

Next, we're going to put a clamp on it. Put the hose down on the fitting and then figure out how we can clamp it down here. We're using the correct style pinching Baron clamps. If you just use a regular screw and hose clamp, that'll work a lot. Torque the Pitman arm bolt to 140 foot-pounds. Now we can fill the reservoir and don't overfill it. Okay, after you fill it once, start the vehicle up, shut it off, fill it again. Probably repeat that twice until you can move the steering wheel easily, then run the steering wheel back and forth a couple of times. Top it off again. Drive it some and just check it the first few times you drive it and make sure it's filled up.

We hope this video helps you out. Brought to you by, your source for quality replacement parts and the best service on the Internet. Please feel free to call us toll-free, 888-844-3393. We're the company that's here for you on the Internet and in person.

Tools needed for replacement:

    Air Powered Tools

  • 1/2 Inch Air Impact Gun

  • General Tools

  • Assistant
  • Floor Jack
  • Drain Pan
  • Jack Stands

  • Ratchets & Related

  • Torque Wrench

  • Screwdrivers & Related

  • Pry Bar
  • Flat Blade Screwdriver

  • Sockets - SAE

  • 1-3/8 Inch Socket
  • 7/16 Inch Socket

  • Specialty Tools

  • Pitman Arm Puller

  • Wrenches - SAE

  • 5/8 Inch Wrench
  • 11/16 Inch Wrench
  • 9/16 Inch Wrench
  • 1/2 Inch Wrench

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