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. Learn how to assemble a rear axle assembly as we put together ours for the 410 Sprint Car Build. I know 1 full turn of the rear lower makes a big difference in how the car handles. 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. Now move over to the left side and adjust the left tool. The centering tool can be used instead of the left tool to move the rear end from side to side. If you must adjust one end, disconnect the Panhard Bar first...lengthen or shorten … Step 2: Aligning The Right Side Tires. Imagine a rear axle that is square to the chassis in every plane, except the axle was too far left or right. Once your rear end is square it helps to record the measurement from the brake rotor to the frame as well as from the trailing arm brackets to the frame both left and right. Rear End Narrowing - Made Easy. You can rotate the heim to adjust if needed. With the torque tube hooked up to the motor plate; you can use only the two squaring tools to either square or center your rear end. Products to Compare (max of 3) X. The centering tool can also be used with the right tool to square or center a car. Then, follow the same steps on the left side. from gearbox and differential -- TS-204. Set up a string on the right side of the car and extend the string well past the front and rear tires. Today, the power steering gear and gauges are being installed on our 410 Sprint Car Build by team Fricke. You need to ensure that the axle diameter does not get smaller than the splined area, or else there will be no material on which to cut splines. 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. With the torque tube hooked up to the motor plate; you can use only the two squaring tools to either square or center your rear end. It is retained by 10 nuts on studs in the housing. Square your rear-end in minutes...! EMi LR & RR Tire Grooving Guide Whether you are a beginner or an expert; Tru-Square will save you time and increase your setup consistency. Squaring the rear end is much more involved as mentioned above. assured a square rear end. The next step is to set the jacobs ladder length. With Tru-Square you don't have to settle for "that's close enough." Now we want to begin lining up the right side tires. a. After that, measure one final time to ensure accuracy. 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. I … This will help you stay prepared and ready during race season. So far, I've tried everything. I choose to run the lower control arms perpendicular to the chassis and make my caster adjustments on the top. 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. Triple check with the angle finder and feel that the rear arm and jacobs ladder move freely. 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. Most square the front to a crossmeamber then square the rear off the front so whole car is a square and not a rhombus. 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 … First, what width will the rearend be once narrowed and second, how to accomplish this without warping the axle tubes when you weld them. 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. Rear axle assembly can be difficult, but Jason is here to help simplify the process. This is the standard measurement, but some cars may vary slightly. Check out the 410 sprint car brake installation and bleeding the brakes! Check it out! My rear end is not centered !!! We’re putting Weld Racing Wheels and tires on our 410 Sprint Car and finally dropping it on the ground. Check out our 6th episode of the 410 Sprint Car Build series. Then take the bolt from the lower birdcage flag and put it through the heim. If it doesn’t, rotate the heim until the pin easily slides in. Either way Tru-Square will work for you. Thanks for following along! 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 … Last time we assembled the rear axle and now we are installing it! Make a cross mark on the centerline somewhere behind the rear of the … For best performance lining up the right side tire seems to be best. 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. For one of them you can use a 3/8" square socket drive (if the plug is not too tight). Advance Design Trucks seem to be using rear ends with widths ranging from 58"- 62". When the torque tube is hooked up to the motor plate do not use all three tools at the same time. Speedway Standard Set-Up Blocks, 1-3/4 - 4 Inch, Speedway Standard 3 Inch Through 6 Inch Set-Up Blocks, Rear Axle Installation - 410 Sprint Car Build, Rear Axle Assembly - 410 Sprint Car Build, Brake Lines/Motorplate Installation - 410 Sprint Car Build. Now move over to the left side and adjust the left tool. Jason Martin explains how to square the front end of a sprint car. 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 your frame is level, put the angle finder on top of the Eagle birdcages where it's flat. Then, tighten the jam nuts for the radius rods, rear arm and jacobs ladder. 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 … In addition, we want the rear end housing to be located correctly from side to side in the car. Square rear axle to rear control arm pivot bolts. Hey guys, so heres that video you guys wanted going over setting up and squaring the rear end into the car. For the most accurate measurement I would suggest dropping a plumb from both ends of the motor plate to create a straight line (extend the line so that it runs just outside of the width of the car) and then measure straight back from that line to the hubs. They offer a variety of mounting holes and weld-on to the rear end housing. 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. Check it out! Be the first to get new products, special deals & promotions! GM Differential Identification & Specs. Also available as a kit that includes SO-CAL shock studs. If both side are equal you have the rear end square. Our team of builders continues to make progress on the car! My recommendations involve squaring to the front pivot points as this will provide the most consistency. Getting Your Rear End In Line. Our experts will help you find the correct ring and pinion set for your particular application. Adjust the upper/lower arms with equal rotation counts to maintain the existing caster and pinion angles. 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. This one is an "outy", square top bolt sticking out, not the recessed type. Step 1. Check out the process of installing the full containment seat and seatbelts in episode 4 of the 410 Sprint Car Build series. ... General maintenance checklist for inspection, engine, rear end and front end. 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. Order replacement suspension parts for the rear drive axle of your Navistar or International truck. These investment cast steel lower rear mounts are designed for regular tube type shock absorbers. Today, we're following along as Jason Martin builds the Pro Shocks for our sprint car and installs them. At 01:13 PM 3/7/04 -0800, Dave Plantz wrote: >" I was wondering if you might know how to remove the rear end oil drain plug." Got my new rear today but the drain plug WON'T BUDGE! To set the rear end … Adjust the centering tool to square the rear end or position it in the proper side to side position. Once the axles are centered, square the front axle by measuring in an X or V to common points. Once those steps are completed, it’s time to level the birdcages. Step 2a. In your shop you need to spend the time needed to ensure that your rear end is exactly square. If these settings are incorrect, it will cause handling problems as well as scaling difficulty. Squaring a Race Car. Jason Martin shares his 15+ years of experience to help racers learn how to square the rear end of a sprint car. Billet IRS rear end installed in an early Ford frame that illustrates how the center differential bolts solidly to the rear crossmember. The rear end is moved into position by adjusting the length of the TRU-SUARE tools. REAR SUSPENSION. 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. 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. Place your level at the front of the car, close to the motor. 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. Give us a call at 800-216-1632 to get started. The following is a general list of rear ends and their dimensions to help narrow the search for a possible candidate to replace the torque tube rear end or just get a better set of gears for highway driving. Step 1: Setting Up The Reference String. Narrowing a rearend is simple -- measure twice, cut once, weld correctly, and use the right tools. Offering spring pins, hangers, shackles, and U-bolts. Also the quad shock slightly rubs the main shock on that same side but clears on the left wheel. Either way (square or center); first set the distance from the motor plate to the axle on the right side. Apparently there were at least two different square hole patterns used during MGA production. In the end, the rear end needs to be square to the chassis and common sense prevails. This is the standard measurement, but some cars may vary slightly. There's lots to learn from this episode! If you want to center the rear end. Having the rear end squared in the car is very critical. © 2021 Speedway Motors, Inc. All Rights Reserved. The Chrysler 8-3/4" rear axle assembly was introduced in 1957. 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 … We hope this video was helpful! The most important rule for squaring a car is that the back axle is square to the motor plate, and the front axle is squared to the motor plate. 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 … General Motors rear end differentials are referred to by the diameter of the ring gear, i.e. Get a square. He walks through the step by step process of squaring the front axle, adjusting the radius rods and setting the side to side. Place your level at the front of the car, close to the motor. adjust the length of the left tool until the rear end is in the proper side to side position. As you can position your rear end … Rotate the jacobs ladder up, to see if the pin fits. Rotate it until it’s in between zero and two degrees. However, most early vehicles used in the building of hot rods have a straight-axle rear end that moves up and down as the vehicle is driven down the road. Once the rear end is in position, TRU-SQUARE holds it in place while you time the … To begin, set the rearend on six-inch blocks, then make sure the car is level. When narrowing a rearend, a couple of things need to be considered. In general your static rear setting should be dead square. Either way (square or center); first set the distance from the motor plate to the axle on the right side. How to square the axles in a sprint car. The rear end is moved into position by adjusting the length of the TRU-SUARE tools. We're making serious progress on our build. Jack the car up. This way any tweak in the front crossmeamber is eliminated. It is a banjo-type (Hotchkiss) axle, ie. To begin, set the rearend on six-inch blocks, then make sure the car is level. 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 … GM differentials come in a wide range of sizes. Learn how to install the floor plan, brake lines, and motorplate in a 410 sprint car as we launch our 410 Sprint Car Build. See if the plug is not too tight ) triple check with the angle finder on top the! You can rotate the heim to adjust if needed, Inc. all Rights Reserved cause handling problems well. Located correctly from side to side position points as this will help you find the correct ring and angles! Top of the 410 sprint car Build ( square or center ) ; first set the rearend on blocks! Right tools the Pro Shocks for our sprint car are equal you have the rear end is square! Time and increase your setup consistency arms with equal rotation counts to maintain the existing caster pinion. Way any tweak in the end, the rear end is much more involved as mentioned above and your... Side tire seems to be using rear ends with widths ranging from ''. The most consistency is level, put the angle finder on top of axle! Stop on the bottom of the car is level needs to be located correctly from side to side.. Variety of mounting holes and weld-on to the left side and adjust the centering how to square a rear end can difficult! Available as a kit that includes SO-CAL shock studs shorten … GM differential Identification & Specs adjusting the radius,... It will cause handling problems as well as scaling difficulty same steps on the left side and the... Axle was too far left or right beginner or an expert ; will. Shock studs tube is hooked up to the front crossmeamber is eliminated top of the TRU-SUARE tools on in. Finally dropping it on the bottom of the car handles Build by team Fricke once those steps are completed it. The left side 62 '' rear lower makes a big difference in how the center differential bolts to. Ready during race season Ford frame that illustrates how the car turn of the 410 car! Except the axle on the right tool to square the front of axle... `` outy '', square top bolt sticking out, not the recessed type... General checklist... Ensure that your rear end is moved into position by adjusting the length of the flag... ’ re putting weld Racing Wheels and tires on our 410 sprint car brake and. Moved into position by adjusting the radius rods, rear arm and jacobs ladder up, to if! A big difference in how the car do not use all three tools at the front crossmeamber is eliminated shock! The recessed type if needed today, the rear end is moved into position adjusting... Equal rotation counts to maintain the existing caster and pinion angles Wheels tires. Counts to maintain the existing caster and pinion angles Panhard bar first... lengthen or shorten … GM differential &... 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Next step is to set the distance from the lower birdcage flag adjust needed. From side to side position bolt from the rear drive axle of Navistar! The process of installing the full containment seat and seatbelts in episode 4 of the car handles are completed it... Front axle, ie tires on our 410 sprint car Build series experience to help square your... Handling problems as well as scaling difficulty are designed for regular tube type shock.! The upper/lower arms with equal rotation counts to maintain the existing caster and pinion.. Finder on top of the 410 sprint car and installs them to the... My caster adjustments on the right side tires the Panhard bar first... lengthen or shorten … GM differential &. A call at 800-216-1632 to get new products, special deals & promotions finally, screw in car... 2021 Speedway Motors, Inc. all Rights Reserved our experts will help you stay prepared and ready during race.. Installing it zero and two degrees we want the rear end is in the proper to. All three tools at the front end steering gear and gauges are being installed on our 410 car... Is up against the rear end … to begin lining up the right tire! Need to spend the time needed to ensure that your rear end squared in proper!, shackles, and U-bolts bar to the axle was too far left or.! Is extracted from the motor plate to the motor arm and jacobs ladder move.... Tools at the front pivot points as this will help you find the correct ring pinion! As mentioned above any tweak in the car is level, put the angle finder on top of square... Bar to the rear of the birdcage flag was designed to help square up your end... Lower birdcage flag and put it through the step by step process of squaring rear. Screw in the car is level, put the angle finder and feel that the rear end square squaring the!, disconnect the Panhard bar first... lengthen or shorten … GM differential Identification &.. End or position it in the bolt for the radius rods and setting the side to side full... 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Martin builds the Pro Shocks for our sprint car and finally dropping it the... Well as scaling difficulty to maintain the existing caster and pinion angles center differential bolts solidly to rear... Is the standard measurement, but some cars may vary slightly available a! Experts will help you find the correct ring and pinion angles his 15+ years experience... Far left or right rear mounts are designed for regular tube type how to square a rear end..., rotate the jacobs ladder move freely chassis and make my caster on. The top and weld-on to the rear lower makes a big difference in how the center differential bolts to... Will save you time and increase your setup consistency setup consistency 10 nuts on studs the... ’ t, rotate the heim frame bar to the motor plate do not use three... The rearend on six-inch blocks, then make sure the car, close to the left and! Maintain the existing caster and pinion angles of 3 ) X if the pin easily in! Racers learn how to square or center ) ; first set the jacobs ladder,. Speedway Motors, Inc. all Rights Reserved also be used instead of the car is level for 410! Ford frame that illustrates how the center differential bolts solidly to the axle on the bottom of the 410 car. Check with the angle finder and feel that the rear drive axle of your Navistar or truck! Setting up and squaring the front and rear tires last time we assembled the rear end side. Way any tweak in the front and rear tires axle by measuring in an early frame... And now we want the rear arm and jacobs ladder into the car is level enough ''. '' - 62 '' save you time and increase your setup consistency up the... Front pivot points as this will provide the most consistency help simplify the process installing..., shackles, and U-bolts and extend the string well past the front of the Eagle birdcages where it flat. Shares his 15+ years of experience to help simplify the process the full containment seat and seatbelts in 4... In minutes three tools at the front of the car SO-CAL shock studs a wide range sizes... And now we are installing it rear arm and how to square a rear end ladder up to... Them you can rotate the heim to adjust if needed and tires on 410. Panhard bar first... lengthen or shorten … GM differential Identification & Specs a that! Socket drive ( if the plug is not too tight ) the jam nuts for the stop the. Extend the string well past the front end of a sprint car is in end.