Secure the lower shock with two 1/2-inch bolts and torque to 35 ft-lbs. Invert the control arm and repeat the process on the other bushing. Leave it alone. Slowly rotate the gears to check for any obvious signs of one gear rubbing on another. Repeat above procedure until oil level remains constant after running engine. This tab piece goes onto the side gear first, and then every other disc added to the stack does not have tabs. Cam Bolt Aftermarket suppliers offer a wide range of C3 Corvette shock absorbers. The steering linkage must be assembled to the pitman arm, idler arm, and to the steering arms using the correct fasteners and assembly torques. Note: C4 - FRONT Bushing Clamp Bolts. It has been said you can move the world with the power of hydraulics. The correct measurement is 26-3/8 inches. Do not torque the end cap bolts on the shafts yet. Plugs These bump stops play a very important role in protecting the suspension in case you hit an unexpected bump too fast and the suspension bottoms out. Only because there aren't any threads protruding past the nut and the arm is further from the box than it was on my old box. 165, Shock Absorber: Camshaft Sprocket 20 Torque specifications for 68-82 Corvettes FT/LBS (Unless specified) Front Suspension: Rear Axle: Front Wheel Bearings 12 Differential Cover Bolts 50 Upper Ball Joint Nut 70 Driveshaft to Pinion Flange 15 Lower Ball Joint Nut 90 Differential Front Mounting Bolt 65 Ball Joint Attachment Nut 28 Steering Arm to Spindle 70 Brake System: We will be focusing on the front suspension in this article and will be replacing all of the major components in a 1978 Corvette. If you are not replacing the caliper, you can make a hook out of mechanical wire (or a coat hanger) and let the caliper and hose hang from the frame. Then press the second bushing into the arm or onto the shaft. Master Remember to buy springs in pairs because each manufacturer has slightly different production methods that affect spring rate and height. As with the top control arm, the lower ball joint is bolted to the steering knuckle with one nut. Add or remove shims that were installed in step 8 on page 105, depending on how far the measurement is from the desired specification. The anti-roll bar has not been installed and is the only missing part in this photo. This includes the upper and lower control arms, steering knuckle with brake rotor, installed wheel bearings, and coil spring. Torque the two front bolts to 70 ft-lbs with a 5/8-inch socket. Slowly raise the jack, while the upper knuckle ball joint opening is placed into the top control arm ball joint stud. The C3 AIM sheet for tie rod clamping indicates that when you tighten the adjuster tube Pressure Plate 45: The last thing you will need to do is to check the toe-in of the front suspension. 22: Coat the bushings and the shaft ends with white lithium grease. After this is done, your first stop should be the local Corvette alignment shop. The specialty rebuilders that have seen [Click here to read more], Dash Carrier Assembly Removal Torque the two front bolts to 70 ft-lbs with a 5/8-inch socket. When taking a differential apart, be sure to mark the left- and right-side pieces. Yoke. Install the ring gear onto the Posi unit with new Grade 8 bolts and lock washers. Rocker Make sure to keep the jack in place securely under the lower control arm. Make sure the springs coil ends are positioned in their respective slots in the frame bucket and control arm. 80 40, Shifter Levers to Shafts The suspension must have time to settle on the springs before these bolts are tightened. As you know, both the Eaton 65-79 and the Dana 80-82 Corvette differentials use springs to preload the clutch pack that transfers torque to the unloaded tire. The parts are then sent to the powdercoating shop to have their surfaces covered and protected. You won't even need one quart of power steering fluid to fill the system. The fourth VIN digit [Click here to read more], HOW TO RESTORE YOUR C3 CORVETTE: 1968-1982, Basic Engine Modifications to Improve C5 Corvette Performance (Part 7), 74 Final Assembly Steps of Your Big-Block Chevy Engine Rebuild, How to Rebuild Your GM Transmission: TH400 Transbrake Guide, Comparing Cylinder Blocks and Fasteners for Chevy Small Block Engines, Chevy Big-Block Performance: Lubrication System Guide, How to Replace the Rocker Panel on a 67-72 Chevy Truck, How to Rebuild Chevy and GM Axles: Step-by-Step, How to Build a Chevy Street Stock Engine for Circle Track Racing, Small-Block Chevy Dyno Tests: Cams & Valvetrain Performance, History of GM Automatic Overdrive Transmissions, How to Source Chevy Big-Block Cylinder Heads, Oil and Lubrication Systems Guide for Big-Block Chevy Engines, 1955-1996 Chevy Small-Block Performance Guide: Camshafts Manual (Part 5), The Ultimate Chevy Big-Block Parts Resource, How to Produce More Power in Your Chevy Small Block Engine, C5 Corvette Brake Upgrades to Improve Performance (Part 5), How to Remove the Dash from a 70-72 Chevelle, C2 Corvette Restoration by the Numbers: What to Look For. The steering knuckle spindle plays a crucial role in front suspension dynamics. Once they are snug, go one quarter of a turn more with your wrench. There's no advantage to extra threads showing beyond the nut on any fastener. If the control valve is out of adjustment too much pressure will be applied in one direction or the other and steering will pull left or right. Filed Under: C3 Corvette Restoration Guide, Chevy Tech Tips, The 700-R4 transmission first came into production in the early 1980s. Clutch discs9. Manifold (You can also use a large punch or another piece of solid metal.) These are fairly inexpensive and it is a good idea to install fresh bump stops when putting the front suspension together. Verify that each bolt has been properly installed and torqued to specifications by marking them with White-Out. Optional equipment, such as air conditioning, also impacts the spring rates that are recommended by the factory. Nicks in the fittings and seats will cause leaks because there's a lot of pressure going on here. Use a locking adhesive on the threads and torque each one to 60 ft-lbs. The seals tend to leak if they sit or have high mileage. Check belt tightness and check for a bent or loose pulley. I just installed my new power steering box and pitman arm. This will ease installation. Part #: A2327 Line: PTQ Arm Cover The control arm has a dimple stamped into it and the end of the bottom coil must rest next to this dimple. Shop 1968-1982 C3 Corvette Suspension Control Arm at Top Flight Automotive. After you have installed the first bushing, install the cross shaft into the arm. Then install the nut and tighten until you get the proper drag on the nut (18 to 22 inch-pounds) on new gears. Be careful not to overtighten, as it will damage the roller bearings. Then balance the valve. This configuration is why the small piece of wood was placed in the trailing arm to keep the ride height closer to factory specs. Our inventory selection includes new pitman arms and slotted hex nuts, along with pitman arm to steering box nuts with washers to fulfill your Corvette restoration needs. . 480 In-Lbs. The fl at washer has a notch that matches the one on the spindle to prevent it from turning. 03: We are going to remove the entire steering linkage as one unit. The 19681982 Corvettes use a steel coil spring in the front suspension. 50, Lower Exhaust Count on Zip Corvette for the best quality Corvette Parts available for your 1968-1982 Corvette. C3 Corvette Trailing Arm Bolt Question? The 15/16-inch shock mount nut was torqued to 75 ft-lbs. Pulley should not wobble with engine running. 06: Disconnect the idler arm bracket from the passenger side of the frame and then use the tie rod separator to remove the control valve stud from the Pitman arm. The body was dropped off at the body shop for all the necessary repairs and painting. Differential 50 Both are now ready to be installed into the frame. Just try one with a different thread. 30, Strut Rod to Spindle Support 75 (+ to Align Cotter Pin) The pump is connected to the power valve and the power steering cylinder. Steering knuckle to lower ball joint: 90 Ball joint to control arm fasteners: 25 Upper control arm cross-shaft end cap bolts: 35-40 Upper control arm cross-shaft to frame: Lower control arm cross-shaft end cap bolts: 45-55 Lower control arm rear cross-shaft to frame: Lower control arm front cross-shaft to frame: Idler arm to frame: Start by installing the control valve onto the end of the drag link. 34 Manifolds If your original differential is not making noise and does not show any evidence of abnormal wear, reinstall the old shims. As you raise the jack, position the upper ball joint into the spindle. If your box has high mileage and exhibits free play, it should be exchanged for a refurbished unit with new gears and original equipment adjustments. The upper control arms are used to adjust the cars front suspension caster and camber settings. A belt drives the power steering pump. Step 20 20: BALANCING THE CONTROL VALVE: The control valve must be adjusted after being dissembled as outlined in the following procedure: Balancing Instructions Add or remove shims to adjust the toe-in or toe-out of the rear suspension. speaking of torque specs in the AIM, mine seems to show 40-60 lb-in for the upper ball joint castle nut. 25: After the shaft and bushings are installed, screw the cap screws, lock washers and collars into place. Outlet If your Corvette was not equipped with power steering from the factory, you will have to change out or add to the crankshaft pulley to accommodate the power steering pump. Visit our showroom to setup an appointment to have your Corvette tuned, accessorized, enhanced or more. Three bolts fasten the steering box to the left side of the frame. Place the control arm in a press and support the other end of the control arm shaft with a 1 11/16 socket. It is important to make sure that this seal is correctly seated into the top of the differential housing. specifications for 68-82 Corvettes, Front Wheel Bearings 50 Be sure to select the correct front spring for your particular model and/or application. Torque to specs. Start gathering various bits and pieces, such as small bolts and brake and fuel lines, and place them in your work area. This helps break in the limited-slip differential before it is put into service. The bolts that you bagged and tagged when you removed this unit should be the correct size. Teeth marks on the Posi- Traction case indicate that the bearings are worn and the pinion gear is hitting the case. The large gray carpet remnant makes the reassembly process more comfortable and dropped parts are more easily found. Needless to say, if this type of deformation is noted, throw the gear away and purchase a new one. A J tool from General Motors is required to accomplish this task. The transverse leaf spring bolts to the differential and is connected to the rear suspension trailing arms. If you take two shims out of one side, for example, you must place the same number onto the other side. :crazy: It says the lower ball joint nut should be at 70-95 lb-ft with a max of 125 when the slot is lined up for the cotter pin. 30 32: Now we can start assembling the steering linkage. Much has happened since our kick-off of the Project. Refer to the Chevrolet Shop Manual or other authorized manuals for the correct assembly and torque information. Two people may be required to reinstall the rear steel spring. Cylinder The fluid pressure reduces the effort it takes to turn the steering wheel. Let's get started. If you have someone stand on the upper control arm during this procedure, installing the steering knuckle is easier because the suspension is being compressed from above and below. For the best experience on our site, be sure to turn on Javascript in your browser. 41: Re-pack the front wheel bearings and install them into each rotor along with the grease seals. Housing Cover All new pumps come minus the pulley so you will need to use a puller such as this to remove the old pulley from the pump without damage. (888) 581-3838. (If you are using steel shims, this is not a problem.) Fill and bleed the system. Torque them to 35 ft-lbs. in/lbs, Drive Spindle Nut 100 (+ to Align Cotter Pin) The shaft is fitted with rubber bushings. Place a dial indicator over the rotor to to verify rotor trueness. Install the side pins with a spring cup and then install the upper spring. Whether you're maintaining your Shark Corvette or completing a full restoration, our selection of C3 Corvette Power Steering parts is unsurpassed. This bracket is attached to the lower control arm on each side of the front suspension. SHARE THIS ARTICLE: Please feel free to share this post on Facebook / Twitter / Google+ or any automotive Forums or blogs you read. This cutaway of a C3 differential reveals the components to inspect when the rear case cover is removed. Reliable sources to validate information regarding serial and casting numbers will get scarcer as time passes. Starting in 1963, the VIN denoted coupe or convertible and build sequence. A couple of spacer plates are employed between the subframe and framerails. 30: Install the upper control arm bumpers. Torque these bolts to 100 ft-lbs. Now position the jack under the control arm as you did before. Third-generation Corvettes use a series of rods attached to the steering box and the suspension steering knuckles to turn the wheels. Start engine and run only for about two seconds. 25, Shock Mount Bolt (Lower) Same spec as the grease zerks. Install ball stud shaft into pitman arm. Place a long fl at bar onto the head of each bolt and hit the bar with enough force to push the head flush against the frame. Two hydraulic hoses connect to the ram and provide fluid pressure to make the unit operate. It is virtually impossible to get this wrong because the sector shaft is splined. 80, Mount Bolts You will notice that there are both right and left hand threads on the tie rods. Cylinder Bolts Remember the coil spring will be pushing down on the control arm with tension. When Chevrolet introduced the new Corvette in 1963 it was hailed as a technological breakthrough, and when 1968 rolled around the C3 was about as close as one could get to a spaceship on wheels. Insert it through the control arm steel shaft from the top. Two 7/16-13 x 214-inch bolts secure the upper control arm to the frame. Chevy Muscle Car Tech Tips, Guides, Articles & How-To. Install the wheel bearing dust cap along with the caliper bracket and dust shield. In many ways, the camshaft is the command center of the engine. The lower shaft is installed in the same manner although you will have to make another longer control arm support. Axle Lonestar Caliper Company offers a complete line of power steering parts, components, and systems for C2 and C3 Corvettes, including pulleys, power steering pump caps, power steering brackets and steering shaft couplings. 20, 3/8" Bolts - 55 The Fora platform includes forum software by XenForo. Adjusting the backlash is the best way to eliminate gear noise. You can also kick it with your shoe to push it into its deep well. A new ball joint is installed and the steel shaft receives new rubber or poly bushings. 65, Spring Link Bolt to Torque Arm.- ft. Reconnect the power steering lines to the control valve. 70 15, Lower Ball Joint Nut 30 Dec . (888) 581-3838 Phone (972) 243-3838 Fax (972) 243-3828 HOURS M-F 9am - 5pm Sat - by appt follow us on Facebook Instructions for Removing and Reinstalling 65-82 Corvette Rear Spindles The following Special Tools are all but REQUIRED to do a proper job: Spindle Knocker (spindle removal tool) Clamp Now torque to specs. You use shims to make it match the desired pattern. Flywheel 90 You can now use the ball joint separator to separate the spindle from the lower control arm. Classic C2 and C3 Vettes have a conventional Saginaw worm-and-sector steering gear, which does the job quite well unless you'd prefer less steering effort. These shims will have to go back in their same location to keep the front end aligned. Also check the oil for any metal fragments, which tell you a gear tooth might be chipped or broken. Phone In Price USD $ 48.99 1953-1962 Each The aftermarket offers anti-roll bars for both front and rear suspension that are larger and stiffer than the stock anti-roll bars. Side bearings7. 70, Upper The relay rod connects to the steering box Pitman arm (lower left). The old shaft protruded about 1/8" past the nut and the new one sticks out just a little past flush. Here are some pics of what I am talking about. This can be corrected with proper adjustment at the control valve via an adjustment screw with the engine running and both front tires off the ground. If you find that the ball joint was bolted in place, then you know the ball joint had been replaced sometime in the past. 70, Oil As with any major rebuild, you will need more than average mechanical ability and some specialized tools along with factory shop, component and assembly line manuals. 95, Disc Brake Caliper Plug Contact us here24 hours a day 7 days a week. Shaft to Wheel Spidle You will also need a shop, component and assembly manual for your year Corvette, a hydraulic jack, jack stand, and tools. The second way is to do it in the car but you must remove the pitman arm and take torque measurements by placing a torque wrench on the steering wheel hub and measuring steering gear torque through the steering column. This is the perfect time to install refurbished or rebuilt components. They start the process by disassembling the old parts. These parts reduce the unsprung weight of your front suspension and are just as strong as the stamped-steel factory parts. These control arms come ready for installation. Make sure the spring is properly seated in the control arm so it does not slip. Housing Thermostat Notice that these rotors have been matched to the spindle for trueness with White- Out. If it meets specifications, it is shot peened to remove all accumulated grime and paint. When Zora Duntov unveiled the independent rear suspension of the 1963 Corvette, he elevated the American sports car to a world class level. Flywheel The trailing arm in this 1969 convertible is being removed so it can be overhauled by Van Steel. With the center of the spring secure, install the spring end links. A professional can put the correct suspension settings back into your car. They spin it fifty times to the left and 50 times to the right. 120 Then cut approximately a 1 slot into the pipe. Two 9/16-inch nuts secure the links. Once they are snug go one quarter of a turn more. Joints U-Bolts Also do not tighten the trailing arm. Power-assisted versions feature a hydraulic pump that is driven off the engine, and it pushes fluid into a ram that greatly reduces the steering effort. This spring is under a lot of tension and might require the use of sandbags to be placed on the frame to help attach these end links. 1953-1954-1955-1956-1957-1958-1959-1960-1961-1962 : Alternative Views: Corvette Parts Worldwide Price Guarantee We will meet or beat any advertised price on internet! Notice where the relay rod is attached to the passenger-side idler arm sleeve. Torque the bolts to 70 ft-lbs. Notice here that the shock absorbers have been mounted and the halfshafts are bolted to the trailing arms and differential. Slowly raise the jack making sure the spring stays seated in the control arm. These bolts should be torqued to 30 ft-lbs and the tabs on the French locks need to be bent (shown). Secure and tighten all lug nuts. Drop the end link into the opening at the rear of the trailing arm. Our performance and installation facility is open Monday-Friday from 8:30am-5:30pm (EST). 80 Big-block half shafts from 1968 to 1974 use 9/16 x 14 x 33164-inch bolts and heavy-duty caps. It is best to sit the differential onto a jack and then install the frame member. Now tighten all of the nuts. 90 Exhaust Cut it to fit between the inside flange of the control arm. Tap it several times with a mallet or hammer to make sure it is seated properly on the pinion shaft. Move the gears back and forth to check for looseness and play from side to side.
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