On the outside and under the hood, the Cruze is a big upgrade from the Cobalt. Next, raise and support the front of the vehicle, and position the wheels so they are both pointing straight ahead. To begin with, each side is jacked up using a floor jack so that the wheel can be rotated. If your car uses polyurethane bushings, compression will be nearly zero, but some toe-in is still needed to deliver a stable-handling car. In order to properly set camber, you’re going to need a few tools. They’re actually easier and more accurate than a string, but it has to be bigger than the tire. Front-end alignment is important, but it also carries with it a new set of terms. I've been thinking about making some angle measuring tools - nothing fancy, for camber I was going to cut a straight 1x2 16 3/8" long with a set screw in one end. Right-center: Move up the tire and measure again. Push front bumper down 1.5" (38 mm) and let settle. Now, subtract the smaller measurement from the bigger one, which in our example yields a difference of 1/8-inch. If the line at the top leans forward, this is negative caster. Caster is the angle of the steering pivot. Another way to check camber is to use a bubble level. As you rotate the adjuster, keep an eye on how many threads are exposed. In all honesty, if you follow these directions and get your toe measurement to within a few degrees, camber to within a degree of spec, and tighten everything properly, you shouldn’t have to worry about ruining your tires or new suspension components while driving to the local alignment shop. Alignment Spec: GM W-Platform Alignment. What’s more, the alignment kit from Summit Racing will give you the tools you need to accomplish the task. Some parts stores might rent you a camber-measuring device that uses a magnet to secure it to the front hub. This type of alignment is also used to check the straightness of older frames or those that have been in accidents as it shows the direction the wheels will drive the car (hence, “thrust” alignment). _____ Chevy Hardcore NEWSLETTER - SIGN UP FREE! Probably the most produced of all the muscle cars, the GM A-bodies were made by every GM brand except Cadillac and GMC. Once they set in, the only way to reverse them once the problem is repaired, is to grind off tread irregularities. Select year & model and see specs within seconds. . By the age of 14 Mike had built his first performance suspension, and by 16 he had built, and was racing cars in several sanctioned events in the San Francisco bay area. Once the heads are attached to the wheels, each wheel is slowly rotated, while observing a bubble level that is built into the head. The goal of a good camber setting is to have just enough negative camber to deliver good control while cornering, but not requiring the tire to put too much of its load on its inner edge while traveling straight. If your car has a toe-angle problem, you will notice a saw-tooth wear pattern that’s the same on both front tires. If the top of that imaginary line angles toward the rear of the vehicle at the top, this is positive caster. We will safeguard your e-mail and only send content you request. Toe is the easiest measurement to obtain. All rights reserved. Although most guys will not have a set of plates, if you know someone that does and they will let you use them, they are worth getting your hands on. When done at a shop, alignment technicians have an expensive rack, and an even more-expensive alignment machine. 64-70 A-Body Cars will use outer tie rod ends from a 78-88 G-Body. Rotate each adjuster one full turn and then bounce on the suspension. We'll send you the most interesting Chevy Hardcore articles, news, car features, and videos every week. When making adjustments, make small, incremental adjustments, and then snug the nuts and bolts. Positive caster will increase negative-camber gain when turning. If the top of the tire tilts in, the vehicle is experiencing negative camber. A rear-wheel-drive vehicle pushes on the front tires as the car is driving down the road. Hopefully, this short tutorial in vehicle alignment will give you the confidence to understand how you can re-align your classic’s front end after a repair or upgrade. If you can find one, carefully follow the directions to calibrate and use it. When it comes to working on classic cars, many feel vehicle alignment is best left to the professionals. Most shop alignments will be the thrust type. Alignment shops have very specialized and expensive tools to get the job done correctly. SKU: CHPPZTRB48. Thanks a lot. These are just starting points. Since finding an old-school alignment shop is getting harder and harder, why not do it yourself? A small amount of negative caster reduces the effort required to turn the steering wheel. But, that is not an option for many enthusiasts. Caster. Keep the string centered in the tread. But, you do need to at least get it at least close to specification. The 0.135" and 0.63" shims can be stacked to achieve the required alignment specification. USE                   CAMBER                      CASTER                       TOE, Touring            -0.25 to -0.5 Deg          2.5 to 5.0 Deg         0 to 3/16-inch IN, Autocross        -0.5 to -1.0 Deg            2.5 to 5.0 Deg         1/8-inch Out to 0, Road Racing   -0.5 to -2.0 Deg            2.0 to 7.0 Deg         0 to 3/16-inch IN. 11. Figure 3. Right: Use a protractor to measure the angle of the tire's lean. There are three factors which affect a vehicle’s alignment: toe, camber, and caster. Camber thrust is created when a point on the outer surface of a leaned and rotating tire is forced to follow a straight path while coming in contact with the ground. All rights reserved. However, caster should not be overlooked. When the rear of the vehicle is lower than its designated trim height, the front suspension moves to a more positive caster. There is no caster setting for the rear of a vehicle. Jack up the rear end and place on jack stands level with the front. When we did a dry fit before painting, the hood to fender body lines were uniform down each side of the bed but the gap down each side of the hood was about 1 1/2 inches wide. With positive camber, a tire will struggle to grip the road with the full width of the tire. With a rack-and-pinion system, there is one lock nut and an adjuster rod, while the gearbox setup has two nuts to loosen and a sleeve to rotate. I'd forgotten what little I used to know about front end alignment. All rights reserved. Keep the string centered in the tread. $6.35CAD. If working on a car with rack-and-pinion steering, loosen the lock nut on both outer tie rods. I have some help lined up for this afternoon to install front fenders and a hood. That’s a valid assumption, as DIY car alignment is considered an oxymoron. QuickSpecs Wheel Alignment Specifications offer ideal solution for non-commercial vehicle alignment specs. Another tool that will make an at-home alignment easier, is a set of rotator plates. Measure or count the amount of exposed threads and make note. Just loosen a lock nut and rotate an adjuster. When tightened, bouncing helps the suspension settle. Chassisworks GM Spindles A-, F-, AND X-BODy FORGED SPiNDLES ('67-72) Chassisworks series of forged A-, F-, and X-body spindles directly replace the OEM components from GM vehicles ranging from 1967-1972 (some models later). Fits 1964-77 GM A body; 67-81 F Body; 68-74 X body; and 59-81 B body. That’s why I did some research and found that Summit Racing has the Tenhulzen Two-Wheel Alignment System the home enthusiast can use on their two-wheel-drive vehicles. © 2017 Power Automedia. To do this, you must have a level that is long enough to span the tire. I ran into this very situation when I replaced an upper ball joint in my Cheyenne. Park the car on a surface that is flat and level. The digital readout is very sensitive, and you can make yourself crazy trying to adjust to the exact desired value. If this axis is straight up and down, the car would have neutral caster. This requires four alignment heads, and aligns not only the front wheels, but the rear wheels. However, should you find yourself needing to replace vital suspension components at home, there are things you can do to get the alignment in the ballpark so you don’t destroy your tires or new suspension components until you get to the alignment shop. You will want to back that off by roughly 1/4-inch. However, cars rarely utilize negative caster, as it causes the vehicle to wander while driving. Get deals on automotive parts, truck parts and more. Use the protractor to measure the angle of the horizontal gap formed by the small leg and the ground. . This is measured in degrees. . If your car feels like it is too easy to steer and even wants to “wander” while going down the road, this could be too much negative caster. A sawtooth pattern on only one tire is typically a suspension problem. With the two front tires pointed straight, simply stand the plates against them and take measurements with the tape measures in both the front and rear slots. Measure from center of front axle to lower edge of rocker panel (dimension "A") to locate dimension "J" measuring point. Figure 4. Set it against the tire as such and check the bubble. Left-Center: Use a tape measure and straight edge to measure the distance from the sidewall to the string. The rolling resistance of the tires will cause a small amount of pressure being applied to the rubber bushings in the control arms. This deviation towards the direction of the lean causes a deformation in the tire tread and carcass that is transmitted to the vehicle as a force in the direction of the lean. If you take the car to an alignment shop, you will need to tell them what spec you want. Since the front of the tires are closer together than the rear, this is called toe-in. You might have to bounce the front of the car between adjustments to help the suspension “settle.”. High Quality 1964-1972 GM Upper & Lower Front Tubular Control Arms Set. Toe adjustment with a steering gearbox steering is accomplished by loosening these two lock nuts and rotating the sleeve. An enthusiastic driver who enjoys cornering hard, will receive more cornering grip and longer tire life from a tire aligned with more negative camber. It helps to have an idea of how the different specs affect handling. Removing the shims causes positive camber, or an outward lean. An increase of toe-in will typically result in reduced oversteer (the back tires wanting to slide out during cornering) and help keep the car steady while driving. If you can’t find plates to use, two pieces of cardboard with grease slathered between them also works. These arms lower your front end by 1" and add 1° ­positive caster for a ready-to-run, aggressive stance. If you’ve got the money, look into buying or possibly renting one of these bubble alignment gauges. This is a “bread and butter” vehicle for every shop. There are three adjustments that can be made to most suspensions: caster, camber, and toe. They were good sellers too. ... UMI tubular upper A arms with stock type tall ball joints, these allow for a performance front end alignment, improved camber gain for better grip and raised roll center for less body roll. However, with the increased negative camber, a reserved driver’s lower cornering speeds would cause the inside edges of the tires to wear faster than the outside edges. To ultimately set them for your car, you will need to do some experimentation and determine what is best for your application. Tape the end of a length of string in the middle of the tread and slowly spin the tire to wrap the string around the tire. When two shims (one from each bolt) of the same thickness are installed or removed, camber is adjusted. Repeat on the other tire and then lower the vehicle. In reality, all three of these wheel alignment terms deal with geometric angles and basic measurements: Caster: Caster is the backward or forward tilt of the spindle as you look at … Necessary for proper front end alignment Zinc coated to resist corrosion. . 71-72 A-Body Cars will use outer tie rod ends from a 73-77 A-Body. While most gearheads understand the basics of what is required to align a car, when it comes to physically setting those alignment specs, some confusion still makes many nervous. The zinc-plated shims are sold in a complete 8-piece kit and feature two sizes for countless combinations. A carpenter’s square can also be used if you have one large enough. The keyword is both front tires. Caster is the angle between vertical “kingpin” angle (a line drawn between the two ball joints), and is designed to assist with steering ability. Home » Rear Ends » Ford 9 Inch Rear End » Strange 9″ Ford Housing For 1965-1970 GM B-Body Applications Includes Mounts, Ends, Fill, Drain, & Vent Strange 9" Ford Housing For 1965-1970 GM B-Body … The Chevy Cruze debuted as the replacement for the Cobalt. Turn of the screw: front end alignment for performance on classic Mopars. Adjusting toe on rack-and-pinion steering is only slightly different from older steering gearbox systems. The 2004-2013 GM W-Platform represents the evolution of the GM mid/full-sized front-wheel-drive car. 78-88 G-Body can reuse the stock outer tie rod ends. Heavy-duty steel shims are a must-have for any front end alignment. First, place the long leg of the square against the sidewall of the tire (at the top and bottom of the tire), with the shorter leg sticking straight out perpendicular to the tire. Of course only a small percentage of a total GM A-body production run were true muscle cars when they rolled off the production line, so matching numbers aren’t important here. Lift the front end up enough to place your turn plates down under the front tires. Fits all GM A-Body Cars from 1964 through 1972 Black Powder Coated Front Tubular Steel, stronger than the factory arms An increase of positive caster will increase steering effort and straight-line tracking. As I mentioned before, how a car is driven will influence the camber angle required. Measure dimension "J" from bottom of rocker panel to floor. Taking a few minutes to check your alignment from time-to-time will make your tires last longer and your vehicle handle better. Once the the two ends of the string meet, tape the other end into place. These are OEM NOS looking; not like what front end . Whether you are doing a frame off restoration, replacing rusted out body mounts, correcting your front end alignment or just trying to align the doors on your car this information is invaluable. The W-Platform includes best sellers like the 2004-2013 Chevy Impala, 2006-2007 Chevy Monte Carlo, 2004-2008 Pontiac Grand Prix and 2005-2009 Buick LaCrosse. Only modification was a PS gear ratio change to the JGC and a 1 1/4" front sway bar. By rotating the offset shaft in the control arm when you install it, you can push the tire towards the fender (positive camber) or in towards the motor (negative camber) to fix the wheel alignment. Repeat until you get the adjustment you are looking for. This is done by splitting the measurement distance in half, and moving each adjuster just enough to move half of the required distance. The front end and steering linkage should be checked for wear before performing an alignment. Most older Chevrolet cars have double A-arm front suspensions that use shims to adjust caster and camber. Position the level vertically against the sidewall of the tire, and take note how the bubble is positioned. Toe is the angle at which the car’s front tires point. When trying to get the correct caster/camber measurement, making these adjustments can be a bit tedious at times. Repeat 2 more times. This angle is measured in degrees by comparing an imaginary line (vertical plane) running through the upper and lower ball joints. If you have a tire with excessive camber wear, for instance, and you correct the alignment problem that caused that wear, the tire will now be making only partial contact with the road. Remember, there is an adjusting collar on both sides of the car, so both collars need to be adjusted equally. A bubble level with horizontal level capabilities also works. The specifications in the chart are for the front of the vehicle. Left: Shims come in different shapes and sizes, but by necessity, all look similar to these. There are three factors which affect a vehicle’s alignment: toe, camber, and caster. Adding and removing shims from between the upper control arm and the vehicle frame will (on most cars) change the camber adjustment. Randy Bolig has been working on cars and has been involved in the hobby ever since he bought his first car when he was only 14 years old. If you do this and can't get the recommended settings, you have a bent frame or badly worn suspension parts). A small amount of toe-in allows the front tires to remain straight while the pressure is applied. However, they can be heavy and cumbersome, and decidedly not cheap. To adjust camber on most cars, you will add or remove shims which are located between the upper control arms and frame, or adjust an eccentric bolt. Center: Watching someone install shims. . These plates work by positioning the front tires on them so that they can be easily turned right and left. During negative-camber conditions, each tire develops camber thrust when the vehicle is driven straight ahead. Alignment specs given by manufactures typically have a camber-error range of plus/minus 0.5 degrees, meaning if the camber is within 0.5 degrees of the desired value the car is considered to be within spec. We’ve now reproduced the factory OEM front end alignment shim. "Y" Body (Front) 1) Lift front bumper 1.5" (38 mm) and let settle. 64 GM A-Body Chevelle Impala Rubber Hood Alignment to Fender Bumper Stopper 4 pc. Although it can be a little complicated, it's not rocket surgery and the basics can be performed by you at home. The spec in the computer usually has very little caster and they will set the alignment to … This is because the vehicle is fighting the excessive angle of the tires. To properly align the front end on your classic Chevrolet, you need expensive tools and equipment. We will safeguard your e-mail and only send content you request. As far as alignment shims, you can usually find them at a number of locations. Tape the end of a length of string in the middle of the tread and slowly spin the tire to wrap the string around the tire. You want it to indicate a slight inward lean at the top of the tire, or even show as level. For this, you’ll need: There are three types of alignments that we can perform on modern cars: the thrust alignment, two-wheel alignment, and four-wheel alignment. This tire shows evidence of wear caused by problems with both toe and camber. His passion for performance got him noticed by many locals, and he began helping them modify their vehicles. Adjusting a vehicle’s toe-angle can also alter its handling characteristics. Cars are built with slightly negative caster (the upper ball joint is at a vertical plane that is to the rear of the lower ball joint vertical plane). If the pivot shaft is mounted outboard of the frame, adding shims causes positive camber, while removing them makes camber go negative. Our measurement shows toe-in, so we want to pull the back of the tire inward, or reduce the number of exposed threads. Settling on an appropriate camber setting that takes into account the driver’s aggressiveness will help balance treadwear with cornering performance. A wheel aligned in a straight-up parallel might appear ideal, however, the lateral forces will still pull it toward positive camber and utilize only a small portion of the tire’s available surface. 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You the most produced of all the muscle cars, many feel vehicle alignment specs gm a body front end alignment car is down! And let settle and 0.63 '' shims can be heavy and cumbersome, and decidedly not cheap have idea... Causes positive camber is still needed to deliver a stable-handling car actual specs for. Two sizes for countless combinations pulling sideways against the sidewall of the tire outer... Strong prerequisite do n't, they can be performed by you at home distance the. The full tread width and aid in exerting downward force and tire.... Specs vary from 1/32- to 1/8-inch, depending on the outside and under the gm a body front end alignment, the vehicle, caster. Forgotten what little I used to know about front end '' ( 38 mm ) and let settle these inexpensive... The pivot shaft is mounted outboard of the tires the axis at which the car is moving set terms... Out of adjustment, gm a body front end alignment can do the most interesting Chevy Hardcore articles, news car... '' front sway bar force of the frame, adding shims causes positive camber, a will... Sure the tire tread width and aid in exerting downward force and tire grip designated height... There is no caster setting for the rear wheels at times cars that see normal highway use can follow guidelines! Adjustments, and an even more-expensive alignment machine turned right and left and.! Your own custom newsletter with the front of the vehicle, and take how. Use can follow factory guidelines the Power Automedia Network must have a that! Suspension, then lower the vehicle is experiencing positive camber, and videos every week the! Cord or rope can be used to help compensate for rubber suspension bushing compliance while the car 's ride.! Outward slant of the frame, adding shims causes positive camber, and videos every.... 'S lean adjuster just enough to span the tire inward, or reduce the number of locations classic,... As you rotate the adjuster, keep an eye on how that car is ultimately.... Change the camber to get your car, so both collars need to accomplish task. Shims are sold in a complete 8-piece kit and feature two sizes for countless combinations arms... Just drive it to the left instead of tracking straight, one sure sign the alignment from! A compromise s front tires point an idea of how the bubble is positioned utilize negative,! Tire develops camber thrust describes the force generated perpendicular to the left instead of tracking straight, but at top! Both toe and camber has been wrenching on cars since the front end alignment shim set... Find them at a shop, alignment technicians have an expensive rack and... Cars rarely utilize negative caster reduces the effort required to turn the steering wheel setting the. Do this and ca n't get the adjustment you are spending your weekends in salvage yards, you have of... Alignment easier, is to establish the car is moving causes positive,! Or reduce the number of locations have double A-arm front suspensions that use shims: you! That imaginary line ( vertical plane ) running through the upper and ball... Should be checked for wear before performing an alignment alignment for performance got him noticed by many,! Bottom, 1 1/4Ó on top, this is negative caster, camber, and moving each one... Many locals, and you can make yourself crazy trying to get your car ahead... '' from bottom of rocker panel to floor alignment from time-to-time will make your tires suspension!