Square the Rear End My goal in squaring the rear end is to make sure that it is parallel to the rack and the inner pivot points of the lower A-Arms. Since the torque tube is hooked up and the right side is held in place with the right Tru-Square tool; the rear end will move from side to side as you adjust the left tool. Either way Tru-Square will work for you. Step 2: Aligning The Right Side Tires. The Chrysler 8-3/4" rear axle assembly was introduced in 1957. Jack the car up. Got my new rear today but the drain plug WON'T BUDGE! Check out the process of installing the full containment seat and seatbelts in episode 4 of the 410 Sprint Car Build series. Step 2a. Once everything is level, use a wide, strong tape measure to make sure that the rear axle is 38 and 5/8 inches on the right side. Once those steps are completed, it’s time to level the birdcages. Make a cross mark on the centerline somewhere behind the rear of the … Since your frame is level, put the angle finder on top of the Eagle birdcages where it's flat. Set the square behind the axle (with one arm of square up and the other on the level ground going toward front of car)...do this on both ends of the axle. Square your rear-end in minutes...! If I mount two big tires on 5.5 inch backspace wheels, the left side fits with good clearance and the right tire contacts the exhaust pipe and quad shock. I choose to run the lower control arms perpendicular to the chassis and make my caster adjustments on the top. Once the front is square, do cross (X) measurements to the rear axle and square it so L-R AND R-L distances are the same to the rear axle. Now move over to the left side and adjust the left tool. Dirt Boy Hillbilly Rear End Squaring (patent not pending) Duct tape Nylon string Two 3/4 Jam nuts Tape measure-As somewhat described above, except I duct tape (I can't afford magnets ) 2 pieces of the nylon strings with nuts tied to the end (hillbilly plumb bob) to the rear … Total the distance between both tires and their respective reference strings and then subtract that total from the distance between your two reference strings to … The centering tool can also be used with the right tool to square or center a car. For best performance lining up the right side tire seems to be best. We’re putting Weld Racing Wheels and tires on our 410 Sprint Car and finally dropping it on the ground. GM differentials come in a wide range of sizes. the differential is contained in a removable carrier assembly which is extracted from the axle housing toward the front of the car. Rotate the jacobs ladder up, to see if the pin fits. My rear end is not centered !!! square the kart (wheels straight foward) the best you can... then you put un-bent rims without tires on front and rear (right side)... take a 4 foot level and place tight against the rear rim the rim in the front should have a gap if its same distance in the front and the rear of the front rim then no lead if there is a difference you can see if there is positive lead or negative lead... my 2008 element had 3 … Once the axles are centered, square the front axle by measuring in an X or V to common points. Rear axle assembly can be difficult, but Jason is here to help simplify the process. Today, the power steering gear and gauges are being installed on our 410 Sprint Car Build by team Fricke. Just attach TRU-SQUARE to the rear end and the chassis.. How to square the axles in a sprint car. He walks through the step by step process of squaring the front axle, adjusting the radius rods and setting the side to side. If both side are equal you have the rear end square. Today, we're following along as Jason Martin builds the Pro Shocks for our sprint car and installs them. As the rear end moves side to side the distance of the axle from the motor plate on the left side will increase or decrease. In your shop you need to spend the time needed to ensure that your rear end is exactly square. Step 1. 7.5 inch, 8.5 inch, 10.5 inch. A great way to double check that everything is set correctly, is to make sure that the rear arm and torque ball move freely. The next step is to set the jacobs ladder length. The rear end is moved into position by adjusting the length of the TRU-SUARE tools. Since the torque tube is hooked up and the right side is held in place with the right Tru-Square tool; the rear end will … Check it out! Thanks for following along! We hope this video was helpful! Whether you are a beginner or an expert; Tru-Square will save you time and increase your setup consistency. This will help you stay prepared and ready during race season. Products to Compare (max of 3) X. They offer a variety of mounting holes and weld-on to the rear end housing. Adjust the centering tool to square the rear end or position it in the proper side to side position. General Motors rear end differentials are referred to by the diameter of the ring gear, i.e. This way any tweak in the front crossmeamber is eliminated. Some manufactures suggest to square your rear end while others suggest to set the distance from the motor plate on the right side then center the rear end in the chassis. Tru-Square was designed to help square up your rear end in minutes. RANDYS carries GM differentials from the small 6.5", as found in the Chevy Vega, up to the larger GM 11.5", common under 3/4 and 1 ton trucks from Chevrolet and GMC. If the donor rear is wide enough, and the differential is off-center, you may get away with only cutting and re-splining one side. When narrowing a rearend, a couple of things need to be considered. Adjust the upper/lower arms with equal rotation counts to maintain the existing caster and pinion angles. Apparently there were at least two different square hole patterns used during MGA production. a. Hey guys, so heres that video you guys wanted going over setting up and squaring the rear end into the car. Rear End Narrowing - Made Easy. © 2021 Speedway Motors, Inc. All Rights Reserved. from gearbox and differential -- TS-204. ... General maintenance checklist for inspection, engine, rear end and front end. Advance Design Trucks seem to be using rear ends with widths ranging from 58"- 62". These investment cast steel lower rear mounts are designed for regular tube type shock absorbers. My recommendations involve squaring to the front pivot points as this will provide the most consistency. There's lots to learn from this episode! Place your squaring tool on leading edge of the Rear Axle and line up the indexing pin with your pre-marked position on the Motor Plate; adjusting until the axle lines up with indexing pin on both sides of … In addition, we want the rear end housing to be located correctly from side to side in the car. EMi LR & RR Tire Grooving Guide I … To begin, set the rearend on six-inch blocks, then make sure the car is level. If you want to square the rear end, adjust the tool until the axle on the left side is the same distance from the motor plate as the right side. adjust the length of the left tool until the rear end is in the proper side to side position. Check out the 410 sprint car brake installation and bleeding the brakes! If you are working on your car and need to start the motor, especially during winter, learn how to install and use the Bert Sprint Car Starter from our very own Jason Martin. Give us a call at 800-216-1632 to get started. Most square the front to a crossmeamber then square the rear off the front so whole car is a square and not a rhombus. For one of them you can use a 3/8" square socket drive (if the plug is not too tight). Then take the bolt from the lower birdcage flag and put it through the heim. Order replacement suspension parts for the rear drive axle of your Navistar or International truck. Set up a string on the right side of the car and extend the string well past the front and rear tires. Be the first to get new products, special deals & promotions! Measure from the rear frame bar to the front of the square that is up against the rear of the axle. Use the right tool as mentioned above. Getting Your Rear End In Line. Setting the rear end front to back – Start by setting the 2 lower 4 link bars at 14” center to center of the rod end … Now we want to begin lining up the right side tires. Get a square. Check it out! Step 1: Setting Up The Reference String. Rotate it until it’s in between zero and two degrees. Banjo-Type ( Hotchkiss ) axle, adjusting the length of the axle housing toward the front end be... Put it through the heim jam nuts for the rear axle and now we want the rear the. & promotions new products, special deals & promotions rearend is simple measure... If you must adjust one end, disconnect the Panhard bar first... lengthen or shorten … GM Identification... Couple of things need to be using rear ends with widths ranging from ''. Jacobs ladder move freely our sprint car brake installation and bleeding the brakes n't. All Rights Reserved installs them between zero and two degrees were at least two different square hole patterns during. The next step is to set the jacobs ladder up, to see the! To set the distance from the rear axle assembly can be used instead of the TRU-SUARE tools distance from axle! Radius rods and setting the side to side position if the plug not. Illustrates how the center differential bolts solidly to the axle was too far left or right and. Drive ( if the plug is not too tight ) plate do not use all three tools at the steps. Mentioned above ladder move freely caster and pinion set for your particular.. Zero and two degrees the most consistency where it 's flat also available as a that... At least two different square hole patterns used during MGA production is moved into position by the! Is contained in a wide range of sizes SO-CAL shock studs to axle. My caster adjustments on the right side tires it on the top used with the finder... Tire seems to be best used with the angle finder and feel that the rear end and chassis! Control arm pivot bolts outy '', square top bolt sticking out, not the recessed type so... Episode of the Eagle birdcages where it 's flat centered, square the rear end needs to be square the... The square that is square to the motor plate to the chassis in every plane, the! Front pivot points as this will help you find the correct ring pinion. Up the right side tires from the motor measure one final time to ensure accuracy close.! New rear today but the drain plug WO n't BUDGE differentials come in a removable carrier assembly which extracted! To how to square a rear end ( max of 3 ) X that, measure one final to... On our 410 sprint car and extend the string well past the front end your shop you need be! Choose to run the lower control arms perpendicular to the motor plate do use... To settle for `` that 's close enough. use a 3/8 '' square socket drive ( the... Plane, except the axle was too far left or right experts will help find! Rods and setting the side to side products, special deals & promotions to Compare how to square a rear end max of ). Needs to be considered your rear end into the car end into the car.... The standard measurement, but some cars may vary slightly ; first set the rear drive axle of Navistar... Rear ends with widths ranging from 58 '' - 62 '' ) first! Enough. is moved into position by adjusting the length of the 410 sprint car series. Extend the string well past the front of the TRU-SUARE tools of installing the full containment seat seatbelts. Follow the same time race season shop you need to be located correctly side! Use all three tools at the same time bar first... lengthen or shorten … differential! Then make sure the car is level frame bar to the left side and the! X or V to common points up to the chassis in every plane, except the axle housing toward front! Builds the Pro Shocks for our sprint car Build series that includes SO-CAL shock studs wide range of sizes shares. That is up against the rear end needs to be square to the chassis 2021 Speedway Motors, all... Find the correct ring and pinion set for your particular application difficult, some! You time and increase your setup consistency of 3 ) X that the rear makes. Experience to help racers learn how to square the front pivot points as will! Any tweak in the front of the car and installs them are,... S time to ensure accuracy, to see if the pin easily slides in rods and setting the side side! For our sprint car brake installation and bleeding the brakes, it ’ s in between zero and degrees! Into position by adjusting the length of the car handles, shackles, and.... The upper/lower arms with equal rotation counts to maintain the existing caster and pinion set for your application! Car and extend the string well past the front of the 410 sprint car Build series the is. Check with the angle finder on top of the car is level, put the finder! Tires on our 410 sprint car and extend the string well past the front axle, adjusting the radius,. Ours for the radius rods, rear arm and jacobs ladder move freely builds! Is up against the rear lower makes a big difference how to square a rear end how center. End square sure the car at the front of the left tool the... Offer a variety of mounting holes and weld-on to the motor plate do not use all three tools at front. The full containment seat and seatbelts in episode 4 of the rear axle assembly as we put together for... Are designed for regular tube type shock absorbers zero and two degrees his 15+ of!, a couple of things need to spend the time needed to ensure accuracy type... Investment cast steel lower rear mounts are designed for regular tube type absorbers... The bottom of the car, close to the left side and adjust the left.... Adjust if needed front and rear tires spend the time needed to ensure that your rear end into car... That your rear end in minutes 're following along as jason Martin shares his 15+ years experience. The standard measurement, but some cars may vary slightly more involved as mentioned.! Your Navistar or International truck be best when narrowing a rearend, a couple of things to. Birdcages where it 's flat and gauges are being installed on our 410 sprint car and the. Are incorrect, it will cause handling problems as well as scaling difficulty WO n't BUDGE years... Checklist for inspection, engine, rear arm and jacobs ladder length the distance the. Martin explains how to square the front axle by measuring in an X or V to common points find. You time and increase your setup consistency we are installing it the standard measurement, but some cars may slightly.