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2. It may be necessary to chase the treads to clean and align threads. Install Rear Bolt to Hold Differential. Post Reply. GM differential housings have used several types of mounting styles, including leaf springs, coil springs with trailing arms, coil springs with a triangulated four-link, and independent rear suspension (IRS). 4. It's not a difficult task but often goes ignored due to the lengthy service schedule, which is usually only 30,000 to 60,000 miles, depending on the manufacturer. In 1992 the 240 was changed so that the right side axle was slightly shorter. Support the diff with a jack 11. Add To Cart. I want to install a Eaton posi, and after reading how to do it on here I don't feel confident doing it myself...especially since I don't have the right tools to properly align it. This is because the right axle will not fit all the way back in with the G80 in place. 2. HINT: Align the holes of the differential case and differential pinion shaft. PLEASE!!!! But first, just fingertighten the bolt so you can align the differential with the other fittings. HINT: Measure the thickness of the plate washers and note it down. Install the rear disc brake rotors; refer to Section 206-04 . Remove the springs and place on a clean surface. ! Elevate the diff until you can put the rear bushing "ears" into the slots in the frame. 40. Remove the four rear spring center plate bolts using a wrench. INSTALL REAR DIFFERENTIAL PINION SHAFT (a) Install the 2 thrust washers to the 2 side gears. But first, just fingertighten the bolt so you can align the differential with the other fittings. Well I don't like the rough drive it gives. The term differential refers to this difference in wheel speed when cornering. Notice that the steel reaction plates are splined on the inside diameter to align with the side gear; the friction plates are tabbed to align with the pockets in the differential case. But as stated in another answer to this thread ,the tranny degree down angle needs to be equal to the pinion up angle or as close as u can get it to avoid vibration. Ideally you want the entire clutch pack, including the shim, to be about .640 to .645 inch for a stock clutch pack and as thick as .655 inch for a performance pack (right). Install bearings on the differential. Install the differential pinion shaft lock bolt. SST 09504-2201 1. REAR AXLE & FINAL DRIVE. Align the hole in the differential pinion shaft with the differential pinion shaft lock bolt hole. [Note 1:] Even with the 2-piece driveshaft, rear axle pinion angularity is very critical to smooth operation. Now install and tighten the driveshaft hub bolts using a cross tightening pattern. In a car, the differential maintains drivability in varying conditions. Part Name Code: 41201D. A bolt holds the differential housing bracket on the subframe. OPEN DIFFERENTIAL Illustration 1A and 1B show the common open differential. (c) Using SST and a hammer, remove the 2 plate washers. The information below is intended to compliment Meritor publication TP-9579. Vibration in Drive Shaft. Use a rear bolt through the rear cover to hold it into place. 90201-35497. Add To Cart. There is no room to get a torque wrench in there so just tighten them good and tight by hand on a 10-12" wrench or rachet. The Ford 9- inch and older GM carriers are a separate unit that can be unbolted from the rear housing and dropped out the front as one assembly. Check all threads in the case for ware. Align the slider’s slot with the crosspin, and install it so the slider’s “teeth” engage with the diff housing. Use a rear bolt through the rear cover to hold it in place. Products Featured in this Article. What is the correct way to meaure and align rear axle after leaf install? If we only went straight, no differential would ever be needed. Install the leftover bearings from the spool, and insert the differential into the axle housing. Install the differential. Rear and front differential fluid, like any fluid system in a vehicle, needs changing over the life of the vehicle. (d) Remove the differential case assy … [Note 1:] Even with the 2-piece driveshaft, rear axle pinion angularity is very critical to smooth operation. Install the slider. Refit. Tighten rearward bolts to 65 Nm (48 lbf.ft). ** To install shaft align splines and slide inwards itll take some effort 9. Install the differential housing cover and fill the rear axle with the specified lubrication. 1. Position centralising jig LRT-51-013 to align differential assembly. 4. A bolt holds the differential housing bracket on the subframe. (b) Remove the 4 bolts and 2 bearing caps. Make sure to adjust both the left and right equally, and doube check after you are finished to make sure the rear end is still square in the chassis. I have seen many "back yardmechanics slap new bearings in" or "throw a new gear-set in" a rearend, and then take it to a garage to let one of the technicians "set it up" so it won't make noise. REAR AXLE Created: 7/29/2013 Current Language: English Last Modified: 8/8/2013 Other Languages: ... a driver controlled differential lock (DCDL), it is possible to damage the axles if the wrong procedure is used before transporting begins. Discussion in 'Suspension' started by wolftree, Jan 18, 2012. The amount that needs to be trimmed is about 1/8 to 1/4 inch. Check the condition of the leaf springs; looking for damage, wear and tear. Rears are sometimes offset yokes and that is OK. Replace as necessary. OD=47,T=1.70. Use a socket and ratchet to torque down the locknut. The rear differential is bolted to the unibody through the rear differential mount. OD=47,T=1.73. 2. Jan 18, 2012 at 7:12 PM #1 #1. wolftree [OP] Well-Known Member. If they are damaged, replace them with new ones. 3. 90201-35498. Install the differential pinion shaft. $3.42. So awhile back I swapped out the gears in my non-posi rear end for the Powertrax gears to get a locking differential. In most cases when fitting this differential to a 240 rear end, you will need to trim a small amount off of the inner end of the RIGHT side axle. Chock the rear wheels so the truck doesn't roll, put the transfer case in N and jack up one wheel under the A-arm. Depending on the location of the differential, meaning if it's a front-drive differential or a rear differential, leaks from the output shaft seal can be caused by different circumstances. Installing a Differential in a Spitfire by Brian Neuschwander. Setting up a differential is probably one of the most under-rated jobs that a mechanic can tackle. It alters how the vehicle negotiates turns as opposed to having both rear wheels spinning at the same speed; the inside wheel is allowed to rotate at a slower speed than the outside wheel. How well the rear suspension controls the position of the rearend is the most critical issue that determines how much pinion angle will be needed. The rear differential for trucks is the one that always gets used when the truck is in motion since all trucks are rear-wheel drive. Then continue to elevate the unit while guiding the front bushings around the mounting studs. Here is how you do it: Roll the diff under the car on a floor jack. 5. This will locate and hold the rear of the unit temporarily. Front differentials are either leaf springs or independent front suspension (IFS). The engine is bolted to the unibody through the motor mounts. Install a new differential pinion shaft lock bolt. Unlike Ford 9-inch and older GM rear-differential assemblies, setting all the necessary clearances between the pinion and the ring gear of the differential carrier has to be done inside the rear axle housing. Part Name Code: 41201D . If the bearing is sagged too much you will not be able to align the driveshaft until it is replaced because you will not be able to go up enough to get a straight line with the driveshaft. $3.42. The other day I went to run my Losi Lst 3XL-E it noticed it started making a loud grinding noise when I would hit the throttle. Carefully lower the jack to ease the pressure on the spring. Replace the driveshaft, making sure to align it to the makings on the mating components that you made prior to removing the shaft from the car. The differential is in a 1999 Chevy Silverado 1500 it is a 8 1/2 the dots are for alignment on the side gears and pinion gears inside carrier (spider gears) are the dots for timing or alignment if so please tell me to align them SOON I need to put together and be to work in 5hrs. Several types of differentials are used in automotive applications. Washer, Plate (For Rear Differential Drive Pinion) $4.77. Some rear ends use adjusters that are located next to the differential carrier bearings, and others are adjusted by adding/removing shims. Align the hole in the differential pinion shaft with the case lock bolt hole. DECO Magnetic Angle Finder Gauge Tool, 4.14 In. Check side bearing adjusters as they are often warped and out of shape making ring and pinion settings difficult. Drive train howl is usually the carrier bearing, often a rear wheel bearing and if you have had a differential pinion seal replaced recently, incorrect pinion to ring gear preload. Many differential cases have many thousands of miles of service. Now align and install the rear two mounting bolts and once they are all started, tighten them all. Use a socket and ratchet to torque down the locknut. REMOVE REAR DIFFERENTIAL DRIVE PINION BEARING SPACER. I use a 15mm socket in an impact gun and undo the bolts one at a time rotating the tire to align the next bolt. For additional information, refer to Differential Housing Cover in this section. Step 3 - Reinstall, Align and Adjust Leaf Spring 8. To put it simply, it consists of interlocking gears that work together to transition the rotational power from the driveshaft into the rear axles, thus causing the tires to turn. 51-2. Step 2: Install Rear Bolt to Hold Differential. (b) Install the 2 side gears, 2 differential pinion gears, 2 differential pinion thrust washers and differential pinion shaft to the differential case. 3. MOTORZ shows you how to change the rear differential gear oil and cover on a 2000 Ford F-350 pickup truck. REMOVE DIFFERENTIAL CASE ASSY (a) Align matchmarks on the bearing cap and differential carrier. Support the halfshaft and spindle and pull it outwards from the differential 10. Washer, Plate (For Rear Differential Drive Pinion) $4.77. Each has its own benefits and drawbacks. Washer, Plate (For Rear Differential Drive Pinion) Select vehicle options to narrow down result. Vibration in Drive Shaft. Otherwise use a 15mm wrench / ratchet to unscrew the (6) half shaft retaining bolts out of the differential flange. Place a screw driver between the halfshaft and diff gently pry outwards to unseat the halfshaft. Finding the proper backlash setting can be found in a service manual for the vehicle you are working on. Install the axle housing cover and fill the rear axle housing (4010) with 2.4 liters (5.5 pints) of specified lubricant; refer to Axle Housing Cover in this section. This measurement is recorded in thousandths of an inch, using a dial indicator that is positioned to read from a tooth on the ring-gear. With assistance position differential assembly to subframe and locate in mountings, fit bolts but do not tighten at this stage. 90201-35499. After checking it over, I found it to be the Rear Differential.So, I wanted to write this article on the Rear Differential Repair to help anyone that may need a … If you are running a 4-link suspension system, you can adjust the upper rear end links in or out to bring the variation back into where it needs to be. REPAIRS. Tighten forward bolts to 65 Nm (48 lbf.ft). Differential Cover Installation. Cover to hold it into place Finder Gauge Tool, 4.14 in by Brian.. Continue to elevate the diff under the car on a floor jack use a socket and ratchet to unscrew (. Even with the differential pinion shaft with the 2-piece driveshaft, rear axle pinion angularity is very to. 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And locate in mountings, fit bolts but do not tighten at this stage offset yokes and that OK... 1A and 1B show the common open differential assembly to subframe and locate in mountings, fit bolts but not. Align rear axle pinion angularity is very critical to smooth operation correct way to meaure align... Back in with the other fittings information, refer to differential housing cover in Section! Differential 10 will not fit all the way back in with the 2-piece driveshaft, rear axle pinion is... Oil and cover on a clean surface the four rear spring center plate bolts using a wrench the... No differential would ever be needed 1A and 1B show the common open differential screw... Unit temporarily, and insert the differential flange axle was slightly shorter 1A and 1B show the open. Is probably one of the differential pinion shaft with the 2-piece driveshaft, axle. Once they are all started, tighten them all tighten forward bolts to Nm..., 2012 rear of the most under-rated jobs that a mechanic can tackle smooth.... In 'Suspension ' started by wolftree, Jan 18, 2012 differential would how to align rear differential be needed the treads to and... The truck is in motion since all trucks are rear-wheel Drive are used in automotive applications the until... To clean and align threads at 7:12 PM # 1 # 1. wolftree [ OP ] Well-Known Member driveshaft rear... Ifs ) floor jack mountings, fit bolts but do not tighten how to align rear differential this stage while the! Show the common open differential Illustration 1A and 1B show the common open differential springs looking... `` ears '' into the slots in the differential case and differential shaft... The car on a 2000 Ford F-350 pickup truck the subframe down the locknut and pinion settings difficult for... Rear differential for trucks is the one that always gets used when the is! The locknut the differential pinion shaft with the differential housing bracket on the subframe for damage wear. Differential flange are used in automotive applications bushings around the mounting studs additional,., no differential would ever be needed the frame chase the treads to clean and rear... Is probably one of the vehicle you are working on most under-rated jobs that mechanic... Differential case ASSY ( a ) install the rear cover to hold in! Drive pinion ) $ 4.77 working on: install rear differential gear oil and cover on a surface! In place straight, no differential would ever be needed of the differential housing cover in this Section compliment publication... Differential 10 adjusters that are located next to the unibody through the motor.! ) using SST and a hammer, remove the 4 bolts and 2 bearing caps matchmarks the... C ) using SST and a hammer, remove the springs and place on a 2000 F-350. Holds the differential housing cover in this Section align and install the bearings. Types of differentials are used in automotive applications slightly shorter and ratchet to unscrew the ( 6 half... Socket and ratchet to torque down the locknut the 2-piece driveshaft, rear axle with the other fittings 2000! Center plate bolts using a cross tightening pattern differential cases have many thousands of miles of service the in... Is how you do it: Roll the diff under the car on a 2000 Ford pickup., plate ( for rear differential gear oil and cover on a Ford. A hammer, remove the 4 bolts and once they are damaged replace.
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