Connect the anti-roll bar to the lower control arm via an end link on each side of the front suspension. Once the bolts have been secured, install the upper control arm bracket. Then press the second bushing into the arm or onto the shaft. Check theside plate end play again. Torque these bolts to 70 ft-lbs with a 5/8-inch socket. 150 80 Place the limited slip unit in the differential housing. 20, Drain Plug Then cut approximately a 1 slot into the pipe. You need to have properly functioning brakes with no thumping or pulsating from out-of-spec rotors. Optional equipment, such as air conditioning, also impacts the spring rates that are recommended by the factory. 65, Auto Front Mounting Bolt 65, Ball Joint Attachment Nut You are on the upper end of the torque range with your 150# reading. Transfer this measurement to the corresponding new tie rod assembly. The 3/4-inch lower nut was torqued to 40 ft-lbs. $14.75 shipping. 30, Torque Arm to Frame Slowly raise the jack making sure the spring stays seated in the control arm. The new shock runs up the middle of the spring and is attached to the upper frame and the lower control arm. Lift them and spread the shoes to mount them on the upper pivot bolt. Three bolts fasten the steering box to the left side of the frame. 95, Disc Brake Caliper on the castle nuts I'm planning to use the torques specified in the AIM. 45, (+ to Align Cotter Pin) Both are now ready to be installed into the frame. Thermostat You use shims to make it match the desired pattern. 25 The movable face angle of all Comet asymmetric system drivers and drivens is 18 degrees, their "stationary" (opposing) face is 2-1/2 degrees and the Comet asymmetric belt angles likewise correspond. 55 55 50, Cross Shaft Bolts Once the spring has been correctly installed, install the lower control arm bump stop. 10: To remove the upper control arm, start by placing a jack securely under the lower control arm as support. Find Us. Pan to Crank Case Attach the frame crosspiece to the differential with two 7/16-18 x 118-inch bolts and 7/16-inch lock washers. After the oil has been drained, remove the back cover on the differential. The rods mount under the differential and connect to the trailing arms on the same bracket as the lower shock mount. the power steering fluid whenever you change the transmission and rear axle lubrication, which should be roughly every 30,000 miles. We're working with technician Paul Taylor of Hot Rods by Dean in Phoenix, who is going to walk you through the C2/C3 power steering system. After the shims have been installed, attach a dial indicator to the differential housing to check the gear backlash. in/lbs, Lower The control arms, spindles and springs should now be in place. Big-block half shafts from 1968 to 1974 use 9/16 x 14 x 33164-inch bolts and heavy-duty caps. C3 Corvette Forums. This system greatly improved handling and ride and that is why it was installed on all C3 Corvettes. 80 Place the control arm in a press and support the other end of the control arm shaft with a 1 11/16 socket. Torque to 25 lb. Spark Check and make sure you can turn the shaft by hand. Make sure you have the correct bolts. Laying them out on your workbench in the proper order will help you identify the correct placement of these parts during reassembly. The front suspension is the perfect place to start reassembling the foundation of your C3. Phone (972) 243-3838. It is critical to catch any imperfections on the workbench and not on the car. Place a dial indicator over the rotor to to verify rotor trueness. Invert the arm in the press. A bit of a big-block famine occurred in the 1990s as racers, high-performance street enthusiasts, restorers, and boat builders sucked up every available big-block; recycled [Click here to read more], If you were to read this book without realizing that in almost every instance the goal Im trying to achieve is more horsepower, youd thinkand rightly sothat Im obsessed with airflow. Tap it several times with a mallet or hammer to make sure it is seated properly on the pinion shaft. 39: Coat the inside of each stabilizer bar bushing with white lithium grease. It connects the upper and lower control arms via two ball joints. Move the gears back and forth to check for looseness and play from side to side. For autocross or track day events, set the shocks on the firmest setting as this provides the best handling. To reassemble the trailing arms, simply reverse the disassembly procedure discussed in Chapter 6. 25, Lower A large rubber bumper is attached to the lower control arm. They spin it fifty times to the left and 50 times to the right. Refer to the Chevrolet Shop Manual or other authorized manuals for the correct assembly and torque information. 24, Upper Control Arm, Shaft Bolts Distributor The carpet stops parts from bouncing under a table or into a small crevice. The large gray carpet remnant makes the reassembly process more comfortable and dropped parts are more easily found. 1963-1982 Corvette Front and Rear Suspension Assembly. Final adjustment is complete when the brakes and new parking brake cables have been installed in the car. Start engine and run only for about two seconds. 120 120 When Zora Duntov unveiled the independent rear suspension of the 1963 Corvette, he elevated the American sports car to a world class level. The body was dropped off at the body shop for all the necessary repairs and painting. Original-equipment spring rates usually give the best ride if your only intent is cruising with your restored Corvette. The easiest way to prepare the differential for installation is to place it onto a floor jack. 35 However, cornering speed is greatly increased with bigger units. (888) 581-3838. 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! For the best experience on our site, be sure to turn on Javascript in your browser. The pump is connected to the power valve and the power steering cylinder. With the C3 rear suspension design, the differential is mounted to the center of the frame and two halfshafts connect to the rear wheels. Housing Bolts (rear) 40, Front Bolt in/lbs, Rear Spring to Carrier 18: To remove the control arm bushings, start by removing the end cap bolts, lock washers and collars. 25, Shock Mount Bolt (Lower) As you raise the jack, position the upper ball joint into the spindle. They are usually to 1 inch in circumference. 50 With all the new parts installed, you want to have your Corvettes front suspension set to factory specifications. Adjusting the backlash is the best way to eliminate gear noise. The shock absorber is inserted from the bottom of the lower control arm and secured with two bolts in the front suspension. Before attempting to [Click here to read more], Choosing big-block cylinder heads depends entirely on the application. In addition it houses the front wheel bearings, brake rotors, calipers, and brake lines. Outlet 4 Items. The clutch discs and their preload springs upgrade an 'open . Tighten the nut when the rubber has been slightly compressed on the shock shaft. . Oil This is a good preventive maintenance procedure to makes sure the parts are not dry. Place a floor jack under the spring and slowly lift the spring until you are able to attach a nut to the bottom of the end link bolt. 18, Bracket Bolts A J tool from General Motors is required to accomplish this task. Slowly rotate the gears to check for any obvious signs of one gear rubbing on another. Free shipping on many items | Browse your favorite brands | affordable prices. It is important to make sure that this seal is correctly seated into the top of the differential housing. i just put agr box on and threads are just even with pitman and its tight. Use a mallet to carefully tap the side bearings into the case. Drain Plug The front steering system connects to the spindle on each side of the car to provide steering to the front wheels. 41: Re-pack the front wheel bearings and install them into each rotor along with the grease seals. 20, 3/8" Bolts - Remember the coil spring will be pushing down on the control arm with tension. 45, Main Bearing Cap 42: Install the rotors and calipers and tighten the wheel bearings as per the instructions in the shop manual. This simple but effective design is very robust and gives long, trouble-free service when maintained properly. in/lbs, Carrier Front Support to "X" Member Corvette engine front accessory drive packages were revised over time as vehicle design changed. Torque the two front bolts to 70 ft-lbs with a 5/8-inch socket. The weight and type of engine (small- or big-block) largely determines the spring rate of the particular car. Universal Teeth marks on the Posi- Traction case indicate that the bearings are worn and the pinion gear is hitting the case. Use a 1/2-inch-drive torque wrench with a 7/8-inch nut and torque it to 75 ft-lbs. Click Here For Details. This cutaway of a C3 steering box shows the inner workings of this critical part. Thanks guys. Distributor The ball joint rivet heads are ground down flush and then chiseled out of the upper control arm with an air chisel. 35, Differential Spring Bolts When properly assembled, these power steering systems perform reliably. Clutch plates10. At the top of the box, an adjuster is used to tighten worn gears. It is fine. Torque the two front bolts to 70 ft-lbs with a 5/8-inch socket. This illustration shows some but not all of the major parts in a Posi-Traction unit.1. Read more about our performance and installation facility here. 03: We are going to remove the entire steering linkage as one unit. Pinion gears5. Main One bolt holds these arms in place. Installation begins with a new power steering-specific pitman arm, which slips onto the sector shaft like this. 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: *All work requires an appointment. 44: After the car is sitting back on the ground, you will need to torque the upper and lower control arm bushings, cap screw and collars. This is the perfect time to install the gas tank between the back frame rails. Come join the discussion about restorations, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more! These bolts should be torqued to 30 ft-lbs and the tabs on the French locks need to be bent (shown). Attach all of the power steering hoses. Two hydraulic hoses connect to the ram and provide fluid pressure to make the unit operate. These two methods are well described and documented in the service manual for your car. This bolt has a 13/16- inch head. Place the frame on four safety stands that are sturdy and protected with pieces of cardboard. When you move the steering wheel left or right you are moving a control valve bolted to the pitman arm that directs hydraulic pressure to one side of the power ram (also known as a slave cylinder) at the drag link to assist steering effort. The third arm does the work of both an idler and pitman arm in a recirculating ball steering system. (outer) 16: After the ball joint is removed, drill the mounting holes out with a 21/64 drill bit to accommodate the new mounting bolts. 30, Leaf Spring Anchor Plate The parts are then sent to the powdercoating shop to have their surfaces covered and protected. Part #: A2327 Line: PTQ The design was so successful that it was carried over for the entire C3 production run with only minor changes. 70, Lower Control Arm Shaft Bolts: The old shaft protruded about 1/8" past the nut and the new one sticks out just a little past flush. Loosen the upper ball joint nut. Use a large piece of pipe or something that is the same diameter as the seal. The suspension must have time to settle on the springs before these bolts are tightened. The rear transverse leaf spring and spring bolts have not been installed. Install a cotter key through the opening and bend back the two wires to prevent the nut from coming loose. Install ball stud shaft into pitman arm. Two 3/8-24 x 7/8-inch bolts secure the steel shafts that are included on the refurbished upper control arms. 17: On the lower control arm, remove the rubber bumper and mounting plate. 70 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. Tubular upper and lower aftermarket control arms are available from Corvette suppliers such as Van Steel. This won't happen if you pay strict attention to how the lines and hoses are routed and installed before taking the system apart. Add or remove shims that were installed in step 8 on page 105, depending on how far the measurement is from the desired specification. Even if you use the same shims in the same location, always take your completed Corvette to an alignment shop. Arm Stud 28: The new pump came with a pulley installation tool. It should not bind after installation. Now mount the stabilizer bar and brackets to the frame. Subtle changes were made to the rear frame to accommodate this new differential. Our performance and installation facility is open Monday-Friday from 8:30am-5:30pm (EST). Housing Then, service the pump to "full" on the dipstick at operating temperature and you're good to go. Use an adjustable micrometer to verify the thickness of any shim before installing it. These are fairly inexpensive and it is a good idea to install fresh bump stops when putting the front suspension together. Add a washer and use a socket and ratchet to tighten the 9/16-inch nut onto the shaft. 50, Upper Ball Joint Nut However, if this is not in your budget, at a minimum you need to replace the ball joints and the rubber bushings. I don't think it's upside down. It is very important to understand the differences in these pumps and order the correct one for your application. High Quality Products. 30, Torque Arm Service the pump with just enough fluid to submerge the pump inside the housing. Pulley should not wobble with engine running. 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. 35, Brackets to Hub Carrier In addition, Zip stands behind all of our Corvette parts with our "No-Hassle Guarantee" - That\'s customer service the Zip way! The idler arm provides support to the steering system and is connected to the passenger side of the frame. Slide the control arm steel bracket through the two bolts and thread on the 11/16-inch nuts. Why tighten more?? Pump Cover Repeat this process until you get the correct measurement. The best place to start is with the shim that came out when it was disassembled. By leaving them just snug, the arm is able to move up and down freely during the next steps. Filter Bypass Valve There's the 1963-'74 "long-neck" Saginaw pump, which is clearly different than the "canned-ham" 1975-'82 Saginaw pumps to follow. When installing the control arm, dont forget to replace the factory alignment shims (two in the rear and one in the front). Outer You can also potentially get hydraulic lines backward during installation from the control valve to the ram and steering becomes erratic quickly. C3 C4 C56 C56-A C59 C6 C66M-R CD4E Chrysler CIB5 Cruise-O-Matic . Four 9/16-inch bolts fasten the half-shaft to the trailing arm bearing. Low Price Guarantee. On the Corvette, you have power assist whereby you have a manual type of steering gear box but the drag link is actually comprised of a hydraulic valve and cylinder. To start, place a pair of locking pliers on one end of the leaf spring. We left off with the Project Split Mod body on a dolly for transport to the body shop and a severely rusted frame. If you liked this article you will LOVE the full book. 02: Jack the front of the Corvette up and let the front suspension hang. 60 Do not overtighten this nut because the bearing could seize. Cars that are equipped with FTL and big blocks are fitted with larger front bars and rear anti-roll bars to help balance the handling. Pinion lock screw and washer4. For power levels up to about 500 hp, theres really not much that needs changing, other than to [Click here to read more], Selecting a camshaft is one of the most important decisions youll face when building a high-performance small-block for street or bracket racing. 45: The last thing you will need to do is to check the toe-in of the front suspension. Change the power steering fluid whenever you change the transmission and rear axle lubrication, which should be roughly every 30,000 miles. 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. Oil Be careful because the spindle will only be attached at the bottom ball joint and it will try to flop down. Van Steel constructed this tool to spin the Posi-Traction unit on a jig that is mounted to a post. When the ball joint is aligned, continue to raise the jack while pushing the ball joint stud through. JavaScript is disabled. This photo shows a typical pinion bearing with a crush sleeve between the inner and outer bearing. Clutch pack guide8. Here are some pics of what I am talking about. When draining the oil from the differential, check for a burning odor, which indicates overheating of the gears and case. Phone In Price USD $ 48.99 1953-1962 Each Once they are snug go one quarter of a turn more. SAFETY NOTE: To minimize any danger, you may want to use a coil spring compressor tool available at any tool rental or auto parts store to help with the coil spring removal. Recheck the side yoke endplay. These rubber bushing are strong enough to absorb the impact under most conditions. Pump 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: Clamp Manifolds A small retainer at the front of the lower frame holds both front lower control arm bolts in place. Needless to say, if this type of deformation is noted, throw the gear away and purchase a new one. In many ways, the camshaft is the command center of the engine. 04:Loosen the power steering pump hoses from the control valve and let them drain into a container. Slowly lower the jack to see if the upper and lower control arms securely hold the coil spring in place. Pinion thrust washers6. It is not necessary to return the same unit to your car. If oil is extremely foamy, allow vehicle to stand a few minutes with engine off and repeat above procedure. Placing it on a large piece of non-shag gray (or any light color) carpet makes it easier to locate dropped parts. The C3 rear suspension was an engineering breakthrough when introduced in 1963 on the C2. The measurement should be .006 to .008 inch. The outer case material changed to aluminum in 1980 to reduce the weight of the rear suspension. The ideal contact pattern (centered on the teeth) is the drawing in the middle. Simply reverse the disassembly procedure discussed in Chapter 6.
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