Any mismeasurement makes it difficult to align the chassis correctly. The weight and type of engine (small- or big-block) largely determines the spring rate of the particular car. Connect the anti-roll bar to the lower control arm via an end link on each side of the front suspension. The Eaton system uses four coil springs, while the Dana utilizes a conical Belleview spring to preload the clutch pack. Part #: A2327 Line: PTQ 90 65, Auto C2 Corvette Pitman Arm & Relay Rod (1963-1967) The front wheels should have a toe-in of 1/8 to 3/8 of an inch. (See Photo #16A.) 13906-C Denton Drive. For the best experience on our site, be sure to turn on Javascript in your browser. Use a torque wrench to secure the box with 9/16-inch bolts and torque to 30 ft-lbs. Once the spring is securely in both wells, slowly raise the jack to prevent the spring from popping out of the upper and lower spring wells. Then, service the pump to "full" on the dipstick at operating temperature and you're good to go. 15, Lower Ball Joint Nut speaking of torque specs in the AIM, mine seems to show 40-60 lb-in for the upper ball joint castle nut. Dont be afraid to hit the heads forcibly because they are designed for this procedure. 6 watching. Copyright 2023, Zip Products Inc All rights reserved. This bumper is designed to hit the lower frame rail if the suspension is fully compressed; this helps avoid damaging any suspension components if a bump is taken too hard. Four discs without tabs are on each side. Three bolts fasten the steering box to the left side of the frame. Five of these discs have tabs. Pinion gears5. Arm Cover Install the nut and tighten it until the hub barely turns. A couple of spacer plates are employed between the subframe and framerails. Step 20 20: BALANCING THE CONTROL VALVE: The control valve must be adjusted after being dissembled as outlined in the following procedure: Balancing Instructions When they have separated, remove the ball joint nut and pull the control arm out of the spindle. Two U-shaped brackets that fit over two rubber bushings secure the antiroll bar to the frame. 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. Rear Suspension Strut Rods and Shock Absorbers. Install the washer. Caliper This is the perfect time to install refurbished or rebuilt components. in/lbs, Carrier to Frame Required fields are marked *. Put the dial indicator on zero; rock the ring gear back and forth to determine how much play it has while the pinion gear remains stationary. We call it power-assist because it provides hydraulic assistance to the Corvette's existing steering system. Read more about our performance and installation facility here. *All work requires an appointment. 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. Flywheel 28: The new pump came with a pulley installation tool. The 19681982 Corvette steering linkage was first used in the 1963 Stingray. By leaving them just snug, the arm is able to move up and down freely during the next steps. If it doesnt, adjust the nut until the opening is located. You have a thread showing. The best place to start is with the shim that came out when it was disassembled. Place the frame on four safety stands that are sturdy and protected with pieces of cardboard. Use a 9/16-inch wrench to remove the four nuts that are located underneath the parking brake hardware. (If you are using steel shims, this is not a problem.) This bolt has a 13/16- inch head. This cutaway of a C3 steering box shows the inner workings of this critical part. 120 Camber A large rubber bumper is attached to the lower control arm. 30, Pressure Plate Bolts On used gears it is 15 to 17 inch-pounds. Slowly raise the jack making sure the spring stays seated in the control arm. These control arms come ready for installation. The relay rod connects to tie rods on both ends, and those are attached to the steering knuckles. Universal Then install the nut and tighten until you get the proper drag on the nut (18 to 22 inch-pounds) on new gears. Low Price Guarantee. Use two 11/1616 x 7/8-inch bolts to attach the front caliper bracket and dust shield to the knuckle. PDF COMET INDUSTRIAL PRODUCTS - Comet Clutches Connecting Our Corvette Parts & Accessories Catalogs have guided thousands of customers through detailed restorations, enhancements and performance modifications. 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. 30 The easiest way to do this is to make a support using 1 3/4 or 2 pipe (fence post will work). 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. Also, the distance between the box and pitman arm on the old box was 1/2" and the new setup is 5/8". The completed differential now needs to be attached to the frame crossmember. Remember the coil spring will be pushing down on the control arm with tension. 40 Ft-Lbs. The upper control arms are used to adjust the cars front suspension caster and camber settings. The tie rod screws into the sleeve and connects to the steering knuckle. 26: Install the new ball joints into the arms and torque them to specs. Refurbished trailing arms include new bearings as part of the price. You will notice that there are both right and left hand threads on the tie rods. This process is the best for identifying any cracks. If you find that the ball joint was bolted in place, then you know the ball joint had been replaced sometime in the past. First start stacking a side gear with a clutch disc that has two tabs or ears on it. Two hydraulic hoses connect to the ram and provide fluid pressure to make the unit operate. The bump stop protects a severe bump or hole in the road. Secure and tighten all lug nuts. Front Cover The third arm does the work of both an idler and pitman arm in a recirculating ball steering system. You will see later why we did it this way. Differential Everything is back in the truck awaiting torque. Install and adjust the parking brake assembly prior to mounting the rear brake rotor. 20 The Fora platform includes forum software by XenForo. Screw it on and line up the slot in the valve with the groove in the threads. 09: The stabilizer bar end links can be removed along with the stabilizer to frame bushings and brackets. 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. After you have installed the first bushing, install the cross shaft into the arm. Mounting Bolts A small retainer at the front of the lower frame holds both front lower control arm bolts in place. Backlash occurs when you take your foot off the throttle; you hear a clunking noise coming from the rear of the car. Tolerances of .005 or less are the runout target. This simple but effective design is very robust and gives long, trouble-free service when maintained properly. A 9/16x18x2532-inch bolt secures the rear lower control arm to the frame. 30, Sway Bar Bracket bolts (to Frame) 25 25 1963-1982 Power Steering Valve, Ram & Pump Rebuild - Corvette Magazine 50, Upper Ball Joint Nut Flywheel 70 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. When lines are backward to the ram you steer left and the ram applies pressure right snatching the steering wheel out of your hands violently. Comet Torque Converter Clutches & Parts for Go Karts & Mini Bikes They will be tightened and torqued when the completed car is sitting on its wheels and ready to drive around the block. The endplay on the side yoke should be .005 to .010 inch. Oil 50 Keep each set together and mark them for each side along with either front or rear. Product Details. When taking a differential apart, be sure to mark the left- and right-side pieces. If there is excessive play, add shims to eliminate it. It is fine, once tight the nut can be removed and the arm will never fall off. Your cam calls the shotsand if it [Click here to read more], Sourcing original big-block parts becomes more difficult every day. The two rear lower control arm attachments must also be securely welded to the frame. Add or remove shims that were installed in step 8 on page 105, depending on how far the measurement is from the desired specification. After this is done, you will need to bleed the power steering system. I just did mine, and I busted a nut with my breaker bar to get it to 150 like you did, and it looks like that. 1963-1982 Corvette Pitman Arm With Power Steering A belt drives the power steering pump. 25, Lower 120 67-69 Firebird/Camaro and 68-74 Nova, Skylark, Apollo, & Ventura Only They are fitted with universal joints so they move through the arc of the suspensions travel as it encounters changes in the road surface. Oil Start gathering various bits and pieces, such as small bolts and brake and fuel lines, and place them in your work area. The shaft is fitted with rubber bushings. Once the spring has been correctly installed, install the lower control arm bump stop. Use a mallet to carefully tap the side bearings into the case. 37: Mount the entire steering linkage assembly to the steering arms and Pitman arm. Clutch It is important to make sure that this seal is correctly seated into the top of the differential housing. Torque sensitive drives are particularly suited to those applications where immediate response to torque demand is required for down shifting and engine speed is ideally maintained at its peak rpm. The 3/4-inch inner camber bolt was torqued to 70 ft-lbs. Chevrolet Corvette Torque Specifications - TorkSpec - Knowledge for the 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. Attach all of the power steering hoses. in/lbs, Stabilizer Bar Link nuts C3 Chevrolet Corvette Suspension Control Arm | Top Flight 25 This Corvette reproduction pitman arm has been manufactured to original factory specifications using today's modern manufacturing techniques. 55 Two 3/8-24 x 7/8-inch bolts secure the steel shafts that are included on the refurbished upper control arms. 90 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. The design was so successful that it was carried over for the entire C3 production run with only minor changes. It should not bind after installation. This is also a good time to steam clean the parts and repaint or powdercoat before reinstallation. Cam Bolt These bolts should be torqued to 30 ft-lbs and the tabs on the French locks need to be bent (shown). 65 When Zora Duntov unveiled the independent rear suspension of the 1963 Corvette, he elevated the American sports car to a world class level. Set up several large tables so assembly parts can be laid out in their correct order. 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. I will not describe them here. C2/C3 Corvette Power Steering Replacement - MotorTrend 23: Place the control arm in the press and install one bushing using a 1 5/16 socket to press the bushing into place. Apply silicone lubricant before installing the seal gear into the housing. The old shaft protruded about 1/8" past the nut and the new one sticks out just a little past flush. Why tighten more?? Repeat this process until you get the correct measurement. 18, Bracket Bolts There is one of each screwed to each sleeve so be careful and do not try to force a tie rod onto the new sleeve. Torque specifications for 68-72 Corvettes Verify that each bolt has been properly installed and torqued to specifications by marking them with White-Out. 03: We are going to remove the entire steering linkage as one unit. The specialty rebuilders that have seen [Click here to read more], Dash Carrier Assembly Removal If you are refurbishing these trailing arms yourself it is wise to include new bearings. This bracket is attached to the lower control arm on each side of the front suspension. Ensure proper installation with the diagram below. Placing it on a large piece of non-shag gray (or any light color) carpet makes it easier to locate dropped parts. Fitment. The 3/4-inch lower nut was torqued to 40 ft-lbs. Starting in 1963, the VIN denoted coupe or convertible and build sequence. Tighten the nuts evenly on both sides. 30, Axle Shaft to Diff.. Side Yoke Oil to Pinion Flange Teeth marks on the Posi- Traction case indicate that the bearings are worn and the pinion gear is hitting the case. Caliper Torque to specs. The control arms, spindles and springs should now be in place. This is done with thin shims inserted between the frame and the control arms steel shaft. Note: C4 - FRONT Bushing Clamp Bolts. Rotate the Posi clutch pack unit (shown on a jig in step 4) until you have enough room to insert the washer. Farm tractors were even fitted with it. This configuration is why the small piece of wood was placed in the trailing arm to keep the ride height closer to factory specs. 22: Coat the bushings and the shaft ends with white lithium grease. These springs were installed on Corvettes built at the new Bowling Green assembly plant. (888) 581-3838. Bolts 80 You are looking for a clearance measurement of .005 to .010 inch. The good people at Zip Corvette Parts, 8067 Fast Lane, Mechanicsville, VA 23111, 1-800-962-9632, were able to supply us with every part we needed. Be sure the cotter key hole lines up. Phone (972) 243-3838. 1963-82 Corvette Rear Suspension Parts - Duntov Motor Company the past. Cars equipped with a big-block require a firmer spring as does the F-41 sports suspension option. 41: Re-pack the front wheel bearings and install them into each rotor along with the grease seals. 1-32878 Corvette Pitman Arm/3rd Arm Ball Stud. 30, Bracket to Carrier This is a good time to refurbish or replace the steel control arms. Also, the distance between the box and pitman arm on the old box was 1/2" and the new setup is 5/8". Simply reverse the disassembly procedure discussed in Chapter 6. 54.23 N-m. Years: 1984-1996. Lubricate all of the clutch discs thoroughly on both sides with GM Posi-Traction additive. 29: Start the re-assembly by installing the lower control arms first, then install the upper control arms and shims and torque the mounting bolts and nuts to specs on both control arms. The ball joint rivet heads are ground down flush and then chiseled out of the upper control arm with an air chisel. 30, Leaf Spring Anchor Plate 70, Oil Use the same procedure on these bolts as discussed in step 2 above. The lower control arm shaft and bushings remove in the same way except you will need a 7/16-202 cap screw to install in the end of the shaft. JavaScript is disabled. Clip off the excess ends with a pair of cutting pliers. Trailing Arm Bolt Question? | Corvette Forum : DigitalCorvettes.com Cross tighten them as you do to secure a tire using the star method. This includes the upper and lower control arms, steering knuckle with brake rotor, installed wheel bearings, and coil spring. With the C3 rear suspension design, the differential is mounted to the center of the frame and two halfshafts connect to the rear wheels. The bump stop is a triangle of rubber mounted to a metal bracket. 4 Items. 50, Cross Shaft Bolts Shown here are a front lower control arm (front) and a rear trailing arm (back). The easiest way to prepare the differential for installation is to place it onto a floor jack. Intake It uses rubber bushings and washers to minimize noise in the car. Insert it through the control arm steel shaft from the top. Do not overtighten. Slide the bushings onto the stabilizer bar and into place. They perform an important function. This helps break in the limited-slip differential before it is put into service. Replacement of this system is straightforward because Chevrolet made it so simple to service. Dont forget to do this; its important. Two 9/16-inch nuts secure the links. With the center of the spring secure, install the spring end links. The new shock runs up the middle of the spring and is attached to the upper frame and the lower control arm. Pitman to steering cross member nut Idler to pivot nut Idler to steering cross member nut 02 VW Jetta TDI 330K+ miles, 48-52 MPG 03 VW Jetta TDI (Wife Crashed it) 200K+ miles, 40-45 MPG 95 Silverado K2500 6.5L TD Ext Cab, 4x4 Original-equipment spring rates usually give the best ride if your only intent is cruising with your restored Corvette. 95, Disc Brake Caliper 1963-1982 Corvette Front and Rear Suspension Assembly. Master A large-diameter steering wheel and skinny, pizza-cutter tires reduced steering effort, but not by much. This tool will seat the pulley onto the pump shaft. This helps keep critical parts within easy reach. The steering box contains worm gears that turn the Pitman arm, which is attached to the bottom of the unit. Install the rear brake rotor over the hub and check it for runout to verify that the rotor and bearings are within factory tolerances. Let's get started. 30, Bracket to Torque Arm Profile. Several well-known Corvette specialty shops offer like-new components at a competitive price that includes a warranty. To reassemble the trailing arms, simply reverse the disassembly procedure discussed in Chapter 6. Chevrolet added optional power steering to the Corvette's underpinnings beginning in 1963, encompassing an engine-driven pump, pitman arm control valve, pressure and return hoses, and a power ram to provide assistance in turns. Move the gears back and forth to check for looseness and play from side to side. 12 Fill oil reservoir to proper level and let the oil remain undisturbed for at least two minutes. . Start by using a tie rod separator to separate the outer tie rods from the spindle arm. 80, (Finger tight and align cotter pin hole.) The C3 AIM sheet for tie rod clamping indicates that when you tighten the adjuster tube Install the trailing arm into the slot in the frame. Fill and bleed the system. Once this nut is secure, your helper can exit his or her perch on the frame. Now install the new pump, new hoses, and then tighten the belt to specs. 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! 12 To start, place a pair of locking pliers on one end of the leaf spring. Nicks in the fittings and seats will cause leaks because there's a lot of pressure going on here. The completed steering system looks like this unit underneath a 1972 Corvette. Four bolts with 9/16-inch heads fasten both strut rods. A forum community dedicated to Chevrolet Chevelle owners and enthusiasts. The measurement should be .006 to .008 inch. Three basic types of Saginaw power steering pumps were used in C2 and C3 Corvettes. Do not tighten the upper and lower control arm bushing bolts yet. If you take two shims out of one side, for example, you must place the same number onto the other side. 30, Mount Bolts 60 Help me fix my sloppy steering. - Corvette Forum Check theside plate end play again. 50 Posi case2. 02: Jack the front of the Corvette up and let the front suspension hang. These two methods are well described and documented in the service . Remove the wood when this is complete. Place a floor jack under the lower control arm so it rests on the jack. The 15/16-inch shock mount nut was torqued to 75 ft-lbs. Attach the frame crosspiece to the differential with two 7/16-18 x 118-inch bolts and 7/16-inch lock washers. specifications for 68-82 Corvettes, Front Wheel Bearings The lower shaft is installed in the same manner although you will have to make another longer control arm support. 30, Torque Arm Step-3: Install Nut on Control Arm A 9/16x18x2532-inch bolt secures the rear lower control arm to the frame. The steering knuckle spindle plays a crucial role in front suspension dynamics. Gather all necessary parts that need to be installed onto the frame. The fluid pressure reduces the effort it takes to turn the steering wheel. 70, Lower Control Arm Shaft Bolts: This is how toe-out and toe-in are adjusted on the front suspension. This part takes a lot of stress and should be closely inspected to ensure that it is in excellent condition before installation. 80 Install a French lock that serves as a washer. There's no advantage to extra threads showing beyond the nut on any fastener. Be careful to not over tighten them, as it damages the roller bearings. The spring should look like this when installed in its correct position. If not, you will not be able to install the lower control arms. Tubular upper and lower aftermarket control arms are available from Corvette suppliers such as Van Steel. Just be sure to dial them down after you are finished playing or your fillings might fall out. 45, Main Bearing Cap Lower the car and turn wheels right and left on the ground. in/lbs, Link Bushing Bolts A torque converter system concept of driver, driven and belt member, the opposing halves or sides of each member being unequal in angle. Loosen it one quarter turn and install the cotter key. When this is done, the sway bar can be removed. Many Corvette suppliers offer bearing and clutch pack kits that make an overhaul procedure much easier. JavaScript seems to be disabled in your browser. 25 If your rotors are new and out of spec, return them to the vendor for a refund. They start the process by disassembling the old parts. The antiroll bar end is attached to the lower control arm with a link. Place the limited slip unit in the differential housing. Pitman Arm Nut Torque | Team Chevelle 42: Install the rotors and calipers and tighten the wheel bearings as per the instructions in the shop manual. 70, 1/2" Bolts - Torque them to 30 ft-lbs. Needless to say, if this type of deformation is noted, throw the gear away and purchase a new one. Here are some pics of what I am talking about. Then its removed from the jig and turned around to repeat this process in the opposite direction. In our case, we just need it to make the steering effort a little easier.
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