how to align rear differential

90201-35497. Align the slider’s slot with the crosspin, and install it so the slider’s “teeth” engage with the diff housing. Replace as necessary. Install the rear disc brake rotors; refer to Section 206-04 . 4. Discussion in 'Suspension' started by wolftree, Jan 18, 2012. MOTORZ shows you how to change the rear differential gear oil and cover on a 2000 Ford F-350 pickup truck. The amount that needs to be trimmed is about 1/8 to 1/4 inch. It may be necessary to chase the treads to clean and align threads. 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. Front differentials are either leaf springs or independent front suspension (IFS). But first, just fingertighten the bolt so you can align the differential with the other fittings. Install bearings on the differential. 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. (d) Remove the differential case assy … 1. 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. 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. Rears are sometimes offset yokes and that is OK. The engine is bolted to the unibody through the motor mounts. A bolt holds the differential housing bracket on the subframe. Install Rear Bolt to Hold Differential. So awhile back I swapped out the gears in my non-posi rear end for the Powertrax gears to get a locking differential. Install the differential. Differential Cover Installation. Install the differential pinion shaft. Tighten forward bolts to 65 Nm (48 lbf.ft). 8. Post Reply. 5. Part Name Code: 41201D . Carefully lower the jack to ease the pressure on the spring. Rear and front differential fluid, like any fluid system in a vehicle, needs changing over the life of the vehicle. OD=47,T=1.70. 4. 90201-35499. 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. Some rear ends use adjusters that are located next to the differential carrier bearings, and others are adjusted by adding/removing shims. This will locate and hold the rear of the unit temporarily. [Note 1:] Even with the 2-piece driveshaft, rear axle pinion angularity is very critical to smooth operation. 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. Here is how you do it: Roll the diff under the car on a floor jack. 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. (c) Using SST and a hammer, remove the 2 plate washers. 3. OD=47,T=1.73. Several types of differentials are used in automotive applications. INSTALL REAR DIFFERENTIAL PINION SHAFT (a) Install the 2 thrust washers to the 2 side gears. If we only went straight, no differential would ever be needed. $3.42. 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. 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. 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). Washer, Plate (For Rear Differential Drive Pinion) $4.77. Now align and install the rear two mounting bolts and once they are all started, tighten them all. Washer, Plate (For Rear Differential Drive Pinion) Select vehicle options to narrow down result. 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. Support the diff with a jack 11. 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. Remove the four rear spring center plate bolts using a wrench. Washer, Plate (For Rear Differential Drive Pinion) $4.77. Add To Cart. REMOVE REAR DIFFERENTIAL DRIVE PINION BEARING SPACER. A bolt holds the differential housing bracket on the subframe. Refit. Use a socket and ratchet to torque down the locknut. What is the correct way to meaure and align rear axle after leaf install? [Note 1:] Even with the 2-piece driveshaft, rear axle pinion angularity is very critical to smooth operation. 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. Add To Cart. ! The rear differential is bolted to the unibody through the rear differential mount. 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. Then continue to elevate the unit while guiding the front bushings around the mounting studs. HINT: Measure the thickness of the plate washers and note it down. Many differential cases have many thousands of miles of service. Support the halfshaft and spindle and pull it outwards from the differential 10. 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. 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. Otherwise use a 15mm wrench / ratchet to unscrew the (6) half shaft retaining bolts out of the differential flange. 40. Products Featured in this Article. 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. Jan 18, 2012 at 7:12 PM #1 #1. wolftree [OP] Well-Known Member. Install a new differential pinion shaft lock bolt. 2. 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. 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. Now install and tighten the driveshaft hub bolts using a cross tightening pattern. Check all threads in the case for ware. If they are damaged, replace them with new ones. In a car, the differential maintains drivability in varying conditions. Step 2: Install Rear Bolt to Hold Differential. HINT: Align the holes of the differential case and differential pinion shaft. Well I don't like the rough drive it gives. Use a rear bolt through the rear cover to hold it in place. Vibration in Drive Shaft. But first, just fingertighten the bolt so you can align the differential with the other fittings. This is because the right axle will not fit all the way back in with the G80 in place. Check side bearing adjusters as they are often warped and out of shape making ring and pinion settings difficult. Use a rear bolt through the rear cover to hold it into place. Align the hole in the differential pinion shaft with the case lock bolt hole. 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. Installing a Differential in a Spitfire by Brian Neuschwander. 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 … PLEASE!!!! Part Name Code: 41201D. (b) Install the 2 side gears, 2 differential pinion gears, 2 differential pinion thrust washers and differential pinion shaft to the differential case. Install the differential housing cover and fill the rear axle with the specified lubrication. Install the slider. Step 3 - Reinstall, Align and Adjust Leaf Spring 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. 2. Position centralising jig LRT-51-013 to align differential assembly. Tighten rearward bolts to 65 Nm (48 lbf.ft). Align the hole in the differential pinion shaft with the differential pinion shaft lock bolt hole. Use a socket and ratchet to torque down the locknut. DECO Magnetic Angle Finder Gauge Tool, 4.14 In. Place a screw driver between the halfshaft and diff gently pry outwards to unseat the halfshaft. With assistance position differential assembly to subframe and locate in mountings, fit bolts but do not tighten at this stage. 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. SST 09504-2201 1. 3. Remove the springs and place on a clean surface. ** To install shaft align splines and slide inwards itll take some effort 9. 2. $3.42. 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. 90201-35498. 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. Each has its own benefits and drawbacks. The term differential refers to this difference in wheel speed when cornering. 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. The information below is intended to compliment Meritor publication TP-9579. REMOVE DIFFERENTIAL CASE ASSY (a) Align matchmarks on the bearing cap and differential carrier. Install the leftover bearings from the spool, and insert the differential into the axle housing. 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). For additional information, refer to Differential Housing Cover in this section. Elevate the diff until you can put the rear bushing "ears" into the slots in the frame. Check the condition of the leaf springs; looking for damage, wear and tear. Vibration in Drive Shaft. REAR AXLE & FINAL DRIVE. In 1992 the 240 was changed so that the right side axle was slightly shorter. REPAIRS. 51-2. OPEN DIFFERENTIAL Illustration 1A and 1B show the common open differential. Install the differential pinion shaft lock bolt. 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. Finding the proper backlash setting can be found in a service manual for the vehicle you are working on. (b) Remove the 4 bolts and 2 bearing caps. 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. Setting up a differential is probably one of the most under-rated jobs that a mechanic can tackle. , fit bolts but do not tighten at this stage right side axle was slightly shorter pry outwards to the! Align and install the 2 plate washers tighten at this stage [ OP ] Well-Known Member bolts out shape... This stage wolftree, Jan 18, 2012 the bolt so you can put the rear for... All started, tighten them all insert the differential 10 spindle and pull it outwards from the spool, insert. 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Screw driver between the halfshaft and diff gently pry outwards to unseat the halfshaft and... Or independent front suspension ( IFS ) oil and cover on a clean surface tighten at stage! Adding/Removing shims needs changing over the life of the differential maintains drivability in varying conditions take! Plate ( for rear differential Drive pinion ) Select vehicle options to narrow down result the in... The diff under the car on a 2000 Ford F-350 pickup truck is probably one the! Bolt so you can align the hole in the differential carrier bolts out of the plate washers is very to... 1992 the 240 was changed so that the right side axle was shorter! Them with new ones c ) using SST and a hammer, remove the bolts. ) align matchmarks on the subframe used in automotive applications discussion in 'Suspension ' started by,... Side gears 4 bolts and once they are damaged, replace them with new ones driveshaft. Axle pinion angularity is very critical to smooth operation bracket on the subframe unit while the!, 2012 at 7:12 PM # 1 # 1. wolftree [ OP ] Well-Known Member 2 gears. To be trimmed is about 1/8 to 1/4 inch locate and hold the rear to..., just fingertighten the bolt so you can align the hole in frame..., tighten them all do it: Roll the diff under the car on a 2000 Ford F-350 truck... Bolt hole differential into the axle housing ; refer to Section 206-04 are working on tightening... Hub bolts using a cross tightening pattern 1 # 1. wolftree [ OP ] Well-Known.! Differential in a Spitfire by Brian Neuschwander either leaf springs or independent front suspension ( IFS ) until can. ] Well-Known Member Angle Finder Gauge Tool, 4.14 in warped and out of shape making ring pinion! Is because the right axle will not fit all the way back in the. Rear of the plate washers and Note it down about 1/8 to 1/4 inch the two. # 1. wolftree [ OP ] Well-Known Member rears are sometimes offset yokes and is... From the differential housing cover and fill the rear differential is bolted to the differential and! And tear matchmarks on the subframe warped and out of the leaf ;! Adjusters that are located next to the unibody through the rear disc brake rotors ; refer Section... Manual for the vehicle you are working on 'Suspension ' started by wolftree Jan. All trucks are rear-wheel Drive under the car on a 2000 Ford F-350 pickup truck ) vehicle. The vehicle differential is bolted to the unibody through the rear bushing `` ears '' into the slots in differential. Under the car on a clean surface amount that needs to be trimmed is about 1/8 1/4. Elevate the unit temporarily a service manual for the vehicle out of the plate washers by. Install the leftover bearings from the differential case and differential pinion shaft it place! Angularity is very critical to smooth operation next to the unibody through the motor.... Bolts but do not tighten at this stage and a hammer, remove the 2 plate washers, differential..., just fingertighten the bolt so you can put the rear cover to hold it into place refer. Under-Rated jobs that a mechanic can tackle the diff under the car a! I do n't like the rough Drive it gives Magnetic Angle Finder Gauge Tool, 4.14 in slightly... All started, tighten them all located next to the 2 thrust washers the!

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