(The front trailing arm bushings have already been installed here.). Tubular upper and lower aftermarket control arms are available from Corvette suppliers such as Van Steel. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. 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. Be sure the cotter key hole lines up. Fill oil reservoir to proper level and let the oil remain undisturbed for at least two minutes. 27, Flywheel to Engine This helps keep critical parts within easy reach. Oil 2, Wheel Nuts 32: Now we can start assembling the steering linkage. After the bushings, ball joint, and steel shaft have been removed from the control arm, the shop inspects for cracks or other damage. This will ease installation. GM torque specs for the pitman arm nut is 120-160 ft-lb.2. Pinion lock screw and washer4. Attach a nut to the bottom of the bolt using a 7/8-inch socket on the nut and a 13/16- inch wrench on the bolt head and torque it to 100 ft-lbs. Once this nut is secure, your helper can exit his or her perch on the frame. 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. Insert the lower ball joint stud into the opening on the steering knuckle. Place a floor jack under the lower control arm so it rests on the jack. The relay rod connects to tie rods on both ends, and those are attached to the steering knuckles. Sometimes the pitman shaft can be twisted inside the gear box. At this stage, the frame has been inspected, repaired, and finished. A large rubber bumper is attached to the lower control arm. The rear shock absorbers are attached to the trailing arms at the bottom and to the frame at the top. After the powdercoating has been applied to the control arm, it is returned to the assembly area. Once the spring has been correctly installed, install the lower control arm bump stop. Torque specifications for 68-72 Corvettes There's no advantage to extra threads showing beyond the nut on any fastener. Big-block half shafts from 1968 to 1974 use 9/16 x 14 x 33164-inch bolts and heavy-duty caps. (If you are using steel shims, this is not a problem.) 38: The front shocks can now be re-installed. The Posi-Traction unit has small clutches that are stacked on each side of the springs; they are held in place with these springs. Repeat this process on the other side. Dont forget to do this; its important. Filter Teeth marks on the Posi- Traction case indicate that the bearings are worn and the pinion gear is hitting the case. The endplay on the side yoke should be .005 to .010 inch. The rotor is now ready to be installed. Spray the flared mounting end with silicone to make installation easier. Step-3: Install Nut on Control Arm A 9/16x18x2532-inch bolt secures the rear lower control arm to the frame. This is done with thin shims inserted between the frame and the control arms steel shaft. Torque Converters (CVT's) Comet has been manufacturing torque converters for recreational vehicles for over 60 years.Our torque converters are designed and built to withstand the extreme rigors of rough applications. Torque them to 35 ft-lbs. You are looking for a clearance measurement of .005 to .010 inch. 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. Now with all of the parts, tools and manuals in hand, lets get started1963-1982 Corvette Front Suspension Rebuild: 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. Coil springs can do a lot of damage if they pop out of the control arm. Use a 24 or its equivalent to hold the upper control arm up out of the way as you install the rubber bumper. Arm Cover Pump Exhaust 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. 90 One bolt holds these arms in place. Refurbished trailing arms include new bearings as part of the price. Assemble the spring plate and put it into a vise. If it is not within this range, the assembly needs to be removed and a different-size shim installed. One Good Turn: Rebuilding C2 and C3 Steering Boxes - MotorTrend This is the perfect time to install refurbished or rebuilt components. This should be part of your routine maintenance check under the car. Grease and pack the inner and outer bearings with wheel bearing grease. Loosen the upper ball joint nut. Fill and bleed the system. The lower control arm includes a steel shaft and is attached with two 7/16-20 x 1.-inch bolts at each end of the arm. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Shown here are a front lower control arm (front) and a rear trailing arm (back). Drain Plug $14.75 shipping. Two trailing arms are bolted to the frame on each side and held up with a transverse steel spring (1968-1980). It is very important to understand the differences in these pumps and order the correct one for your application. 95, Disc Brake Caliper Count on Zip Corvette for the best quality Corvette Parts available for your 1968-1982 Corvette. 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. Pump Cover Step 20 20: BALANCING THE CONTROL VALVE: The control valve must be adjusted after being dissembled as outlined in the following procedure: Balancing Instructions 30, Bracket to Carrier Thanks guys. in/lbs, Stabilizer Bar Link nuts 30: Install the upper control arm bumpers. Pan to Crank Case 05: Remove the power steering ram retaining nut from the mounting bracket. With all the new parts installed, you want to have your Corvettes front suspension set to factory specifications. 24, Upper Control Arm, Shaft Bolts You use shims to make it match the desired pattern. The completed differential now needs to be attached to the frame crossmember. Water Pitman Arm Nut Torque | Team Chevelle 60, Upper Just try one with a different thread. Make sure the guide pin on the spring aligns with the guide hole in the differential. Make sure the sponge washer is installed. When the ball joint is aligned, continue to raise the jack while pushing the ball joint stud through. This is a good preventive maintenance procedure to makes sure the parts are not dry. The upper and lower control arms secure the coil spring. You can adjust the strut rods to change the rear suspension camber setting on your Corvette. The easiest way to do this is to make a support using 1 3/4 or 2 pipe (fence post will work). If restoration is your goal, your choice is limited to locating the correct casting for your original engine. Now that the frame has been returned to your work area, reconfirm your factory frame measurements. 18: To remove the control arm bushings, start by removing the end cap bolts, lock washers and collars. Change the power steering fluid whenever you change the transmission and rear axle lubrication, which should be roughly every 30,000 miles. If not, you will not be able to install the lower control arms. Thermostat PDF COMET INDUSTRIAL PRODUCTS - Comet Clutches 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. Install the lower washer and rubber bushing onto the shock shaft. These parts reduce the unsprung weight of your front suspension and are just as strong as the stamped-steel factory parts. When all of the pressure is off the spring, pull the control arm down as far as it will go and remove the coil spring. IN VEHICLE C2/C3 CORVETTE STEERING GEAR ADJUSTMENT. C3 Corvette Forums. Notice that these rotors have been matched to the spindle for trueness with White- Out. 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. in/lbs, Carrier Front Support to "X" Member It must not slip because it can cause injury if it does. They lock the clutches and provide power to both wheels. Lift the trailing arm from the rear and place a 1 x 1-inch piece of wood into the same place that the shims go. The fluid pressure reduces the effort it takes to turn the steering wheel. 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. The box output shaft isn't sticking out past the nut as much as the box I removed. Once the bolt is attached with the nut and washer, slowly lower the jack. 25 25: After the shaft and bushings are installed, screw the cap screws, lock washers and collars into place. Farmers Branch, TX 75234. Front Mounting Bolt 65, Ball Joint Attachment Nut Any mismeasurement makes it difficult to align the chassis correctly. This puts the trailing arm in the correct ride height position and makes putting the half-shafts and strut rods into the car much easier. 28: The new pump came with a pulley installation tool. Crankcase Flywheel Be careful; the seal is easily damaged. Make sure the spring is properly seated in the control arm so it does not slip. 165, Shock Absorber: Camshaft Sprocket 20 The design was so successful that it was carried over for the entire C3 production run with only minor changes. Outlet A new ball joint is installed and the steel shaft receives new rubber or poly bushings. Check and make sure you can turn the shaft by hand. 30, Sway Bar Bracket bolts (to Frame) 25 Torque the side caps to 60 ft-lbs. These bolts should be torqued to 30 ft-lbs and the tabs on the French locks need to be bent (shown). The differentials are basically all the same inside, but you find some minor changes during an overhaul. The frame is light enough for two people to carry it to your work area for assembly. 30 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. Many Corvette suppliers offer bearing and clutch pack kits that make an overhaul procedure much easier. Clutch discs9. Transfer this measurement to the corresponding new tie rod assembly. Differential I just installed my new power steering box and pitman arm. Standard non-performance Corvettes are fitted with a front antiroll bar that is designed to provide a smooth ride. My assembly manual calls for the nut to be torqued to 120-160 pound feet. Any accident damage or rust that has eaten through the frame has been cut out. Optional equipment, such as air conditioning, also impacts the spring rates that are recommended by the factory. There's the 1963-'74 "long-neck" Saginaw pump, which is clearly different than the "canned-ham" 1975-'82 Saginaw pumps to follow. You can now use the ball joint separator to separate the spindle from the lower control arm. The ball joint rivet heads are ground down flush and then chiseled out of the upper control arm with an air chisel. 130, Rear Bolt Two people may be required to reinstall the rear steel spring. Here are some pics of what I am talking about. *All work requires an appointment. (Photo Courtesy Van Steel). 20, Joint to Upper Arm Remember to do both the upper and lower control arm bushings. Install the outer bearing and follow that with a fl at washer. Required fields are marked *. 90 The springs push against the clutches with more force as the cars speed increases. New ball joints with rubber or polyurethane bushings are included in the rebuild process. The shims will be installed later; do not put them in now. The suspension undergoes a lot of stress, and this is the perfect time to rebuild or refurbish these parts before they are reinstalled. Come join the discussion about restorations, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more! THE RUGGED 40 SERIES TORQUE CONVERTER is composed of heavy gauge stamped steel to withstand the extreme rigors of rough applications. Subtle changes were made to the rear frame to accommodate this new differential. Shaft to Wheel Spidle For the best experience on our site, be sure to turn on Javascript in your browser. 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. 20 Much has happened since our kick-off of the Project. Toll Free Order Line. Note: C4 - FRONT Bushing Clamp Bolts. This tab piece goes onto the side gear first, and then every other disc added to the stack does not have tabs. 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. Refurbished units are fairly inexpensive and return a Corvettes steering to its original responsive feel. $61.99 Each. 80, Mount Bolts This differential has been assembled and is ready for installation. Arm Stud Verify that each bolt has been properly installed and torqued to specifications by marking them with White-Out. The bolts screw into this retainer and you must take extra care not to strip the threads when you secure the steel shaft to the frame. 53-74 Electronic Tachometer Conversion Kit. 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. You can use the social sharing buttons to the left, or copy and paste the website link: https://www.chevydiy.com/c3-corvette-restoration-guide-suspension-differential-reassembly/. The third arm does the work of both an idler and pitman arm in a recirculating ball steering system. 18, Door Hinge Bolts By leaving them just snug, the arm is able to move up and down freely during the next steps. Housing If you liked this article you will LOVE the full book. This wasn't a GM exclusive. 04:Loosen the power steering pump hoses from the control valve and let them drain into a container. 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.
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