![]() The spindle is found in automobiles with full-float axles. It is usually made of steel to withstand the heavy-weight of the vehicle. The spindle acts as a surface for the wheel bearings to roll on. It allows the axle to rotate while keeping the wheels attached to the vehicle. If you have any questions please call 78.The Differential Spindle is a component of your automobile's suspension system. A little preventative maintenance will increase your safety level. Also, check all components for cracks, bends, etc. Periodically check all fasteners on your race car for tightness, and condition. The nylocks should never move, but if it does, the cotter pin is a safety and will keep the wheel on the car. #Car spindle installThen install the cotter pin on the outside of the nylocks. This goes for both tapered bearings and ball bearings. Snug the 5/8" nylocks to the point where wheel end play is eliminated basically creating a zero preload situation. Install the wheel and lube the bearings as needed.However, use enough to accomplish something. Don't overdo the Loctite, as it will run down into the bushings and lock up the spindle. Using more red Loctite, install the tow cap(s) and steering arms with the 1/4-28 x 5/8 12 point bolts.9 times out of 10, it will just be loose screws. Tip: If your kingpin bushings appear to be worn out, check these setscrews. When you have to remove the setscrews, heat them up with a propane torch, and the Loctite will somewhat dissolve, letting you remove them easier. Use some red Loctite on the setscrews and install the setscrews into the kingpin boss and tighten the screws, binding the kingpin to the boss to eliminate play.If you choose not to make these flats, good luck getting the kingpin out for service. If this is a retrofit to an older car, and the flats do not line up with the setscrews, grind flats in the appropriate location the same depth as the existing ones. There are two flats cut into the kingpin, these are supposed to line up with the setscrew holes in the boss. Slide the kingpin through the top spindle bushing, through the kingpin boss, and through the lower spindle bushing.The next time you want to grease it, you will have to take the spindles off the car and repeat this process. This is the only opportunity for the spindle to get grease. Grease the inside of the boss, for corrosion purposes, and grease the inside of the bushings and the faces of the bushings.Spacers are available from Neil and Parks, call with your needs. If this is a retro-fit to an existing boss, a spacer may be necessary. There should be little vertical movement. If this is not achievable, you will have to remove the old boss, and weld on the supplied ones. The kingpin should slide through with little effort, but be snug at the same time. The N&P spindles are 8 degrees, the same as most others, but there are a few weirdoes. Also check the angle of kingpin inclination. Check fitment of the kingpin in the boss.Don't use a die grinder, it will most likely ruin the boss. Then, run the 1/4-20 tap through the setscrew holes, and ream or hone the bore to 11/16". Weld in the kingpin boss with it held in a front end fixture, and let it cool.Tip: Spindle centerline is the same height as the center of the kingpin boss for calculating ride height. Consult your chassis builder for proper caster angle. King pin boss is readily put into an 1 1/4" notch, at 8 degrees from vertical. If installation is on an existing car, skip to step 3: Prepare your tube axle/a-arm for the fitment of the king pin boss. Qty 2 - Steering arms, unless you purchased a third.Qty 2 - N&P Spindles, with bushings installed and honed to size.Tig welder with competent operator for new construction only.Reamers are available from N&P or any industrial supply. 11/16" Hand reamer or rigid hand hone if new construction. ![]()
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