Outer Trestle Systems 2470 Island Dr, Suite 308 Spring Park, MN 55384 Check theside plate end play again. We call it power-assist because it provides hydraulic assistance to the Corvette's existing steering system. This is a good time to refurbish or replace the steel control arms. Original-spec shocks have a service life thats at the lower range of this estimate, while premium aftermarket shocks last at the upper range. You might have to wait until the weight of the engine compresses the springs enough to install the links, or have some friends sit on the frame to help make the connection. If restoration is your goal, your choice is limited to locating the correct casting for your original engine. 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. 05: Remove the power steering ram retaining nut from the mounting bracket. My assembly manual calls for the nut to be torqued to 120-160 pound feet. 60 The major mechanical components have now been correctly installed into your refurbished frame. 30, Sway Bar Bracket bolts (to Frame) 25 In many ways, the camshaft is the command center of the engine. It is virtually impossible to get this wrong because the sector shaft is splined. Now position the jack under the control arm as you did before. The old shaft protruded about 1/8" past the nut and the new one sticks out just a little past flush. These manuals are a must because they will supply you with removal and installation procedures along with all of the correct torque specifications. The design was so successful that it was carried over for the entire C3 production run with only minor changes. The carpet stops parts from bouncing under a table or into a small crevice. Place a floor jack under the lower control arm so it rests on the jack. This tool will seat the pulley onto the pump shaft. The completed steering system looks like this unit underneath a 1972 Corvette. They perform an important function. These springs were installed on Corvettes built at the new Bowling Green assembly plant. Make sure the guide pin on the spring aligns with the guide hole in the differential. 50, Upper Make sure the spring is properly seated in the control arm so it does not slip. Feed the shock through the bottom of the lower control arm and insert the top of the shaft into the opening on the frame. This pitman arm isused on all 1958-1964 power steering set-ups and the 1958-1962standard steering set-ups. Once the spring has been correctly installed, install the lower control arm bump stop. Two trailing arms are bolted to the frame on each side and held up with a transverse steel spring (1968-1980). Running the Pitman shaft adjustment screw all the way in will allow you to install the cap completely and then torque to spec. Do not tighten the nuts yet. Several well-known Corvette specialty shops offer like-new components at a competitive price that includes a warranty. Optional equipment, such as air conditioning, also impacts the spring rates that are recommended by the factory. 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 dust caps are used to cover and protect the front wheel bearings. The block is attached to the Pitman arm gear that turns the steering system when it moves back and forth. 90 in/lbs, Carrier to Frame Yoke. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Your email address will not be published. When they have separated, remove the ball joint nut and pull the control arm out of the spindle. Use two 11/1616 x 7/8-inch bolts to attach the front caliper bracket and dust shield to the knuckle. Congratulations! We now have a rolling chassis ready . This helps break in the limited-slip differential before it is put into service. Removing Pitman arm from steering box 1,948 views Apr 5, 2018 Like Dislike Share Save Fun with cars - mostly Corvettes 640 subscribers Frame off refresh of a 1974 Corvette. You will see later why we did it this way. The shims will be installed later; do not put them in now. Repeat this step on the opposite side. The differentials are basically all the same inside, but you find some minor changes during an overhaul. In our case, we just need it to make the steering effort a little easier. 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. The recirculating ball unit is attached to an arm connected to a relay rod. The body was dropped off at the body shop for all the necessary repairs and painting. This won't happen if you pay strict attention to how the lines and hoses are routed and installed before taking the system apart. Also do not tighten the trailing arm. If not, you will not be able to install the lower control arms. Once the knuckle has been pushed into the ball joint stud, secure it with a 3/4-inch nut and torque to 45 ft-lbs. Cut it to fit between the inside flange of the control arm. Two people may be required to reinstall the rear steel spring. Start by installing the control valve onto the end of the drag link. Observe the coil spring and make sure it stays securely in its upper and lower wells. The springs push against the clutches with more force as the cars speed increases. 30, Camber Cam Nut You will notice that there are both right and left hand threads on the tie rods. Apply silicone lubricant before installing the seal gear into the housing. The upper control arm bushings are now fitted with new rubber units. 60 42: Install the rotors and calipers and tighten the wheel bearings as per the instructions in the shop manual. After the clutches and side gears are installed, insert a thrust washer on each side of the unit. These shims will have to go back in their same location to keep the front end aligned. Fill and bleed the system. Install the side pins with a spring cup and then install the upper spring. Slowly raise the jack, while the upper knuckle ball joint opening is placed into the top control arm ball joint stud. Oil Tubular upper and lower aftermarket control arms are available from Corvette suppliers such as Van Steel. If it is not within this range, the assembly needs to be removed and a different-size shim installed. This is the perfect time to install refurbished or rebuilt components. 63-82 Corvette Power Steering Renew Kits (valve, ram , hoses), 63-68 Corvette Power Steering Relay Rod (drag link), 69-82 Corvette Power Steering Relay Rod (drag link), How to Rebuild 1965-1982 Corvette Rear Trailing Arm & Wheel Bearings, 1963-1982 Corvette Control Arm Bushings and Ball Joint. This system greatly improved handling and ride and that is why it was installed on all C3 Corvettes. Our inventory selection includes new pitman arms and slotted hex nuts, along with pitman . The steering linkage must be assembled to the pitman arm, idler arm, and to the steering arms using the correct fasteners and assembly torques. Your objective here is to install fresh bearings, seals, clutch packs, and races to replace any worn parts in the differential. Then balance the valve. Install the spindle dust shield gasket onto the spindle. Shop 1968-1982 C3 Corvette Suspension Control Arm at Top Flight Automotive. If you find this problem replacing the bearings and shims should correct the issue. If one wheel loses traction the clutches engage and lock both wheels to provide added traction. Carefully continue to tap the seal in place while moving the shim around to ensure that the gap is the same all around. (If you are using steel shims, this is not a problem.) You need to have properly functioning brakes with no thumping or pulsating from out-of-spec rotors. C2 and C3 Corvettes used the same idler arm from 1963-'82 for both manual and power steering applications. Install the trailing arm into the slot in the frame. Notice here that the shock absorbers have been mounted and the halfshafts are bolted to the trailing arms and differential. 150 45 Crankcase This part takes a lot of stress and should be closely inspected to ensure that it is in excellent condition before installation. Install a cotter key through the hole and bend the two wires back to prevent the nut from coming loose (as you did on the lower ball joint). drag link (center link) - part #3740402 (See the part in the middleof Photo #12.) About 18-inch pounds is common for this step. Tighten the control valve clamping bolt and assemble the ball stud to the Pitman Arm. Find Us. The ram (shown) is attached to the relay rod. 30, Torque Arm A large-diameter steering wheel and skinny, pizza-cutter tires reduced steering effort, but not by much. After the oil has been drained, remove the back cover on the differential. In addition, Zip stands behind all of our Corvette parts with our "No-Hassle Guarantee" - That\'s customer service the Zip way! 26: Install the new ball joints into the arms and torque them to specs. Specs. A couple of spacer plates are employed between the subframe and framerails. 04:Loosen the power steering pump hoses from the control valve and let them drain into a container. Half-shafts connect the differential to the rear wheels. The pump is connected to the power valve and the power steering cylinder. 45: The last thing you will need to do is to check the toe-in of the front suspension. Just try one with a different thread. The lower control arm has a deep well that supports the bottom of the front suspension coil spring. 32: Now we can start assembling the steering linkage. All of the power steering hydraulic hoses are installed. 38: The front shocks can now be re-installed. Once they are snug, go one-quarter turn more with a wrench. Arm Cover The date code is irrelevant unless youre really trying to re-create [Click here to read more], If oil is the lifeblood of your engine, then the oil pump and lubrication system are indeed the heart and circulation system of your big-block Chevy. 120 Nicks in the fittings and seats will cause leaks because there's a lot of pressure going on here. Change the power steering fluid whenever you change the transmission and rear axle lubrication, which should be roughly every 30,000 miles. Oil Power Torque Transmission Mount - A2327. Clamp 16: After the ball joint is removed, drill the mounting holes out with a 21/64 drill bit to accommodate the new mounting bolts. This new design can be found in all 19801982 Corvettes. 90 After this is done, your first stop should be the local Corvette alignment shop. It is not necessary to return the same unit to your car. Be careful not to overtighten, as it will damage the roller bearings. We left off with the Project Split Mod body on a dolly for transport to the body shop and a severely rusted frame. Exhaust Get the best deals on Pitman & Idler Arms for Chevrolet Corvette when you shop the largest online selection at eBay.com. specifications for 68-82 Corvettes, Front Wheel Bearings Water (outer) We take orders in our showroom or you may call your order in over the phone and we will prepare your items in advance so you do not have to wait. This should be part of your routine maintenance check under the car. Laying them out on your workbench in the proper order will help you identify the correct placement of these parts during reassembly. Depending on your driving style and the type of shock installed, expect to get 15,000 to 30,000 miles on a new set. I just installed my new power steering box and pitman arm. The aftermarket offers anti-roll bars for both front and rear suspension that are larger and stiffer than the stock anti-roll bars. 24, Upper Control Arm, Shaft Bolts Small-blocks from 1968 to 1979 use two U-bolts on each side to attach the shaft to the differential, which are secured with 9/16-inch nuts. Make sure the springs coil ends are positioned in their respective slots in the frame bucket and control arm. Replacement of this system is straightforward because Chevrolet made it so simple to service. Flywheel 20, 3/8" Bolts - They start the process by disassembling the old parts. speaking of torque specs in the AIM, mine seems to show 40-60 lb-in for the upper ball joint castle nut. It connects the upper and lower control arms via two ball joints. 60, Control Arm front Pivot Bolt Big-block cars use a different attaching method than small-blocks. Because the system is external, everything is easy to access. Refurbished units are fairly inexpensive and return a Corvettes steering to its original responsive feel. 34 Pump Insert the lower ball joint stud into the opening on the steering knuckle. Your completed front suspension should look like this unit, which is installed on a 1980 Corvette. 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. 165, Shock Absorber: Camshaft Sprocket 20 The front steering system connects to the spindle on each side of the car to provide steering to the front wheels. 65 Make sure to keep the jack in place securely under the lower control arm. Now use a ball joint separator to loosen the ball joint from the spindle. Press out the bushing into the socket. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. The correct measurement is 26-3/8 inches. The frame is light enough for two people to carry it to your work area for assembly. 45, (+ to Align Cotter Pin) This helps keep critical parts within easy reach. You can now use the ball joint separator to separate the spindle from the lower control arm. Notice that these rotors have been matched to the spindle for trueness with White- Out. After the shims have been installed, attach a dial indicator to the differential housing to check the gear backlash. 70, Upper Recheck the side yoke endplay. Lonestar Caliper power steering pumps are not equipped with drive pulleys, which means you will need to use your existing pulley or order the right one for your application. You use shims to make it match the desired pattern. 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. Step 1 01: Here are all of the components that Zip supplied for the front suspension rebuild: Springs, power steering pump, ram, valve, hoses, idler arm, drag link, tie rods, sleeves, control arm bushings, bumpers, stabilizer bar bushings, end kits, shocks, and all of the mounting hardware kits. The other side connects to the bearing support leg and the shock mount is pushed through the legs and the strut rod. Two U-shaped brackets that fit over two rubber bushings secure the antiroll bar to the frame. Sometimes the pitman shaft can be twisted inside the gear box. 480 In-Lbs. It is not diffi cult but care must be taken to avoid injury to yourself or others. Vette. I will not describe them here. Pump 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. 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. If your rotors are new and out of spec, return them to the vendor for a refund. Push the gasket to the back of the spindle. $61.99 Each. Tighten the nuts evenly on both sides. You are now ready to remove the dash assembly. The 19681982 Corvette steering linkage was first used in the 1963 Stingray. Shot peen the rear trailing arm until all the paint and grime have been removed. The weight and type of engine (small- or big-block) largely determines the spring rate of the particular car. Phone In Price USD $ 48.99 1953-1962 Each Placing it on a large piece of non-shag gray (or any light color) carpet makes it easier to locate dropped parts. Pan Drain Plug 30: Install the upper control arm bumpers. 60, Upper Four bolts in the middle secure it. Each outer end of the spring is connected to the rear of the trailing arm with a link. If you removed the calipers from the brake hoses, you will need to bleed the front brakes. After the powdercoating has been applied to the control arm, it is returned to the assembly area. Move the gears back and forth to check for looseness and play from side to side. (The front trailing arm bushings have already been installed here.). 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. Remember to do both the upper and lower control arm bushings. 33: Mount the idler arm to the other end of the drag link. Rotate the Posi clutch pack unit (shown on a jig in step 4) until you have enough room to insert the washer. :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. Sometimes this sounds a lot easier than it actually is. Manifold The arms are robust but the bearings are prone to failure. 25 It is much easier to do it this way. Lift them and spread the shoes to mount them on the upper pivot bolt. 18, Door Hinge Bolts It is much quicker to exchange your old trailing arm for a refurbished one. Just be sure to dial them down after you are finished playing or your fillings might fall out. These systems leak at the control valve and they can also leak at the power ram. Because quality is so critical, Lonestar Caliper rebuilds all of its power steering pumps, rams, control valves and steering gears in-house. Install the screw and tighten to specs. The control valve screws onto the end of the draglink. This is a good procedure to complete before taking the car to the alignment shop. Whenever there is a need, want and use for a torque sensitive drive system device that is infinitely variable from engagement . Worn Posi-Traction clutches often chatter at low speeds when making a sharp turn. Cars equipped with a big-block require a firmer spring as does the F-41 sports suspension option. Aftermarket suppliers offer a wide range of C3 Corvette shock absorbers. If your backlash is too large or too small you can shift the shims from one side to the other. It also helps to place a piece of colored tape on each side of the bench to keep the left- and right-side parts separated. Loosen it one quarter turn and install the cotter key. Throughout the chapter on ram charging, air filters, [Click here to read more], Shortly after the birth of Corvette in 1953, a Russian immigrant named Zora Arkus-Duntov joined Corvette. Recheck the adjustment after putting 100 miles on the car. The thickest shim in your clutch pack (.045 inch) is used to ensure that the bottom part of the seal does not bottom out, which causes leakage. The shock absorber is inserted from the bottom of the lower control arm and secured with two bolts in the front suspension. Raise the differential and cross frame with the floor jack until you can secure it to the frame with two 5/8-inch bolts. 35 120 65, Spring Link Bolt to Torque Arm.- When you service the pump with fluid, keep in mind as fluid gets hot it expands and can overflow out of the pump. Use a mallet to carefully tap the side bearings into the case. Corvette, 1963 thru 1982 View More. The rods mount under the differential and connect to the trailing arms on the same bracket as the lower shock mount. (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) The rotor is now ready to be installed. Pump Cover (See Photo #16A.) Now you have a special control arm support tool. Two 9/16-inch nuts secure the links. Bolts 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. 09: The stabilizer bar end links can be removed along with the stabilizer to frame bushings and brackets. Spray the flared mounting end with silicone to make installation easier. Clutch Thermostat Install the lower washer and rubber bushing onto the shock shaft. Use a hammer to strike the pickle fork to knock the trailing arm away from the bearing support. Some even include multistep adjustments to dial in the ride you want. When the pump shaft is flush with the inner lip of the pulley, it is seated. 1-32878 Corvette Pitman Arm/3rd Arm Ball Stud. 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. 20 I figger it ain't going no wheres. Add or remove shims that were installed in step 8 on page 105, depending on how far the measurement is from the desired specification. Bolts Make sure that they are completely seated. . A belt drives the power steering pump. The old shaft protruded about 1/8" past the nut and the new one sticks out just a little past flush. 40 Ft-Lbs. This will be one of the last bolts to tighten. Particularly problematic with C2/C3 power steering systems is control valve adjustment and leak issues. The two rear lower control arm attachments must also be securely welded to the frame. One bolt holds these arms in place. Place the frame in a low-traffic and well-lit area so it can be safely reassembled. Secure the lower shock with two 1/2-inch bolts and torque to 35 ft-lbs. 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. Torque these bolts to 70 ft-lbs with a 5/8-inch socket. Contact us here24 hours a day 7 days a week. Pinion shaft3. Tie rod assemblies operate on the principle of the common turnbuckle. A piece of wood or a half piece of pipe is placed on the inside of the control arm to keep the arm from bending while the bushings are being pressed into the control arm. 17-27, Steering Arm Nuts Coil springs can do a lot of damage if they pop out of the control arm. Install the nut and tighten it until the hub barely turns. All of these components should be evaluated, inspected, and repaired or replaced as necessary. If you pull the pitman arm, it is sometimes possible to see the twist in the sector shaft splines. Get some friends to sit on the frame as you perform the next part. This photo shows a typical pinion bearing with a crush sleeve between the inner and outer bearing. Count on Zip Corvette for the best quality Corvette Parts available for your 1968-1982 Corvette. Manifold 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. They provided a better ride and reduced the unsprung weight of the rear suspension. If they pass the inspection, send them to the powdercoating shop so their surfaces can be powdercoated to prevent deterioration. Count on Zip Corvette for the best quality Corvette Parts available for your 1968-1982 Corvette. Verify that each bolt has been properly installed and torqued to specifications by marking them with White-Out. A J tool from General Motors is required to accomplish this task. 27, Flywheel to Engine Cover Bolts Send as many parts as possible to the powdercoating shop in order to get the most for your money. This saves a lot of time during the reassembly process when trying to locate the next part to install onto the frame. 25, Shock Mount Bolt (Lower) At this stage, the frame has been inspected, repaired, and finished. 18, Bracket Bolts When the ball joint is aligned, continue to raise the jack while pushing the ball joint stud through. The ideal contact pattern (centered on the teeth) is the drawing in the middle. High Quality Products. 20: If you want to freshen up the control arms for a new look, thoroughly clean them and spray 2 or 3 light, even coats of Eastwoods Underhood Black. 20, Differential Mount Bracket This is a manual steering application, which is why power steering components are not seen in this photo. 20, Joint to Upper Arm to Pinion Flange 25 Four discs without tabs are on each side. The clutch discs and their preload springs upgrade an 'open . 65, Wheel Nuts This prevents them from loosening and backing out. Install ball stud shaft into pitman arm. Four 9/16-inch bolts fasten the half-shaft to the trailing arm bearing. Heads Torque the side caps to 60 ft-lbs.
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