Ford rear differential leak symptoms. It is linked to the transmission with a driveshaft.

1. One of the biggest signs your pinion seal is failing is it is leaking. How Do You Know Ford F150 Speed Sensor Is Faulty? To know if your Ford F-150 speed sensor is faulty you need to inspect it physically. Looks the the pinion seal. Learn how to replace axle seals on a solid rear axle that is leaking gear oil. Sounds like the secret of solving ford f150 rear differential problems is now familiar. All wheel drive vehicles have three differentials: a front, rear, and center differential. Nov 3, 2013 · 2004 - 2008 F150 - Rear Diff "shudder" fix - well I see that many people suffer from this shudder issue and I developed the same problem a short time ago. Engine oil condition: One of the factors that can cause the rear crankshaft seal to leak is using the wrong type of engine oil or a low oil level. It is not good if the differential is leaking fluid because it will ultimately lead to significant internal damage, so get your vehicle looked at by a drivetrain specialist before it gets any worse. Due to wear and use, it may begin to leak over time. You will use one oz. Mar 2, 2023 · Symptoms of a bad Rear differential. 10 ) that has a mid-pitched singing whine from the rear axle, whenever decelerating from 55-35mph. Apr 13, 2016 · Differential fluid often looks just like motor oil. If you’re experiencing any of these symptoms, it’s important to have your vehicle checked out by a qualified mechanic as soon as possible. Identifying and repairing the leak promptly is crucial to prevent damage to the differential. Mar 28, 2010 · 2004 - 2008 Ford F150 - Rear Axle Seal Leak - Has anyone else with the 04-08 f150 had a leak in the rear axle seal? I got my rear brakes swapped to ceramic brakes and got rid of the cheap OEM brakes. Here are some steps to take to fix a rear differential seal leak: Clean the area around the leak. Jun 1, 2019 · Ford didn't use gaskets on the cover so it will leak eventually No not expensive to fix Just drain it by loosening the bolts then clean the surfaces and reinstall using RTV or there are 3rd party gaskets now for most Ford differentials Jan 26, 2013 · QUICK TIP in stopping preventing rear end leaks. I had read that the diffs were supposed to be filled to a level at the fill hole. When I turn the key to start position I can hear the ABS module 'kick in', meaning it sounds like it is setting itself up to start. The light brown fluid in these components would tell you the story. Leaking pinion seal. A snow storm is coming Mar 16, 2021 · I have a 2007 Ford F-150 with the FX4 package, a little lift, and some larger-than-factory (28575R18) Toyo all-terrain tires. If one wheel turns faster than the other, this will cause a rattling or grinding noise to come from the underside of your car. It is quite thick, so I didn't think it would leak. All Wheel Drive. Jan 23, 2012 · So I just noticed that my rear diff. Mar 25, 2016 · I will also have my PTU oil changed at regular intervals (when it goes bad, it tends to foam and spew out, so it won't be a secret, and leaks are pretty obvious according to others. Read more on how to inspect a differential for leaking. The noise you are hearing is probably the wheel bearing going bad on that same side due to the leaking axle seal. Symptoms to Watch For Sep 20, 2020 · Did you ever check the rear diff pumpkin for fluid leaking on it? Usually a diff failure occurs on the ATS due to the rear axle seals leaking enough that fluid gets low enough to cause damage. The seal stops the differential fluid from getting on the brakes and rim. The most important thing to do is to catch the leak early; if left unchecked, a small leak can quickly turn into a much larger one. Jul 27, 2015 · Looked at the wrong timing. 6L STX 4x4 with 147000 miles and I have owned it for exactly one year and have so many problems. There is fluid being blown out the vent tube outlet on the drivers side frame Sep 28, 2013 · 1973 - 1979 F-100 & Larger F-Series Trucks - 79' f150 Rear differential seal leak - Hi I am new to the site and a new owner of a 79' f150 2wd ranger lariat package. Differential Fluid Leak Service. The leak is on the front of differential rearend just behind the four bolts you take off to remove the driveshaft. I used enough silicone , it looked like a first year auto student did the repair. The differential is the housing that contains the axle's gear drive and connects to a drive shaft in order to provide power to the drive axle. If there’s no visible leak, the differential level should be fine. You may need to replace your rear differential seal at around 250, 000 miles. Differential & Axle Parts Specialists We have your differential parts in stock ready to ship today. Dec 9, 2022 · 2015 - 2020 Ford F150 - 2020 Rear diff leak - My 2020 F150 has a leak around the rear diff, I scheduled appt w/ my ford dealer for the second week in Jan 2023. However I did drill a hole through the cross member which covers the fill plug. And as Jan 26, 2024 · A rear differential leak refers to differential fluid leaking from the rear differential housing of a vehicle. Inspect the ends of the axle housing, the sides, front, and the differential pan seal for leaks. I could see some fluid on the rear axle housing, driver's side. 0. As it turned out, all ten nuts holding the third member in place, were loose. Inspect the rear drive unit for oil leaking from the rear differential vent cap located on the rear cover. Two years ago I drained and filled the rear differential. (I may be wrong) It started flinging fluid all over Jan 13, 2024 · 2015 - 2020 Ford F150 - Rear differential leak - Hey guys, I just bought my 2020 Lariat last week. Common symptoms are having gear oil slung on to your front fuel tank and/or gear oil leaking onto Dec 31, 2016 · I have recently noticed that the 9″ Ford rear end in bowtie6 has started leaking. Its not a constant leak, and only seems to drip after Dec 17, 2017 · 2017+ Super Duty - Rear differential leaking - Hey everyone, I'm new to this forum but have been reading these posts for quite some time. Looks like the rear pinion seal is leaking fluid. The differential has gear oil inside that maintains proper lubrication and temperature control while the vehicle is driving. Noise gets worse in warmer weather Cause: Posi chatter due to improper lubrication; worn clutches or spider gears; improper assembly Jun 13, 2022 · Common Symptoms You Need To Replace Your Rear Differential. Jan 8, 2023 · A ZF Differential. These areas consist of: 1. It seems like they are just trying to get out of Jul 19, 2023 · I put Mobil 680 gear oil in the differential. Its capacity is 2 qts and he found that it was 1 qt low! No leaks found and he Jan 11, 2016 · Each time your vehicle is serviced, the pinion seal should be inspected to ensure there are no symptoms of a bad or failing pinion seal. of the product per quart of fluid in the system, and should expect to start seeing results after 100-200 miles of driving. I used Teflon tape around the plugs, so the leak must be from the sides of the banjo and axle housings, but it is hard to Sep 26, 2022 · There are a few common symptoms of rear differential problems in the Ford F150, including noise from the rear of the vehicle, vibration when driving, and leaking fluid. In most cases, repairing a rear or front diff leak should not cost more than $400. Differential makes noises while driving May 6, 2023 · 2015 - 2020 F150 - 2015-20 F150 XL low level rear differential gear oil - I've never checked my rear differential, so I asked my mechanic to check the rear differential oil level as he had my 2015 F150 XL 2WD on a lift for some brake work. Some of the common symptoms of a bad differential include abnormal noises from the drive axle, fluid leaks, and differential fluid contaminated with metal. If it's leaking from there, then you likely need to do the pinion seal. I took it to the dealer and they called me back saying that it's not leaking and that it's just residue. Mar 30, 2012 · Noise: Banging or clunking while making a turn, backing up, or rapid deceleration (like on a freeway off-ramp). And the leak looks different then that time. I do know that the Orange Crush developed leaks at the axle seal very early, but the leak never became an issue. Whining Differential or Transmission. The rear differential takes the power from the engine and distributes it to the two drive wheels. One of the symptoms most commonly associated with bad or failing differential or gear oil is a noisy transmission or differential. I have 24,800 miles still under warranty. There are two main ways to check for a leaking differential. Rear end vibration is one of the often-reported symptoms in a rear-wheel drive which indicates that the differential clutch pack is going bad. 73 Electronic Locking diff. a. Now I just insert a 3/8 drive socket extension to remove fill plug, insert a suction tube a remove the old lubricant, and pump in the new fluid. Still How to fix a rear differential leak? A rear differential seal leak is a pretty common issue and relatively easy to fix. Aug 13, 2023 · The rear differential seal is a seal in the differential that prevents the fluid from leaking out. The diff flexes under high torque-loads. Possibly overfilled I let some fluid out until right at bottom of fill plug and seal still leaks. Today I noticed that where the driveshaft meets the diff is covered in oil. Gear oil looks to be spread around underneath quite a bit, not dripping from a single spot (i. It could be part of your routine car maintenance check. Jan 7, 2016 · 2. The rear main seal leak developed about the 160K mile mark and too a long time to develop into enough of a leak for me to start using High Mileage oil, which seemed to help slow it down. While this is a pretty large price range, that’s because rear differentials vary vastly in size, and you still have to factor in the exact problem of your rear differential. klown Below are the few symptoms that you would experience when your vehicle’s differential clutch pack is going bad. Its a 3. Dec 2, 2022 · If you’re driving a car and notice that your rear differential is making a noise, it’s important to take action. Aug 8, 2001 · Where on the differential is it leaking? The pinion seal is located on the front of the diff where the driveline connects to the differential. It’s not dripping on the ground, but wet to the touch, and enough to wet the diff, and My questions are can I top off Oct 14, 2015 · 2015 - 2020 Ford F150 - 2015 F150 Rear Differential Leak - I have a truck that is 6 months old with 10K miles and I noticed the rear differential is leaking. It will be hard since there Aug 27, 2007 · Checked all connections on ABS system and they seem fine, the 50A fuze is also ok. He said he thinks its How to fix the breather vent on the rear differential on most cars, this is one a Rav4 as an example, but very common on these models. Some people refer to this differential as the rear diff or simply the rear end. Dec 26, 2016 · Upon smelling a burning smell from what I thought was coming from the rear end and later seeing fluid on the inner rim of the rear tires when doing an oil change, I immediately went to FTE to diagnose my symptoms. I expected to have some dribble out when I pulled the plug. Remove and discard the rear differential vent cap from the rear drive unit cover. The bearings and seals came already pressed on the axles. This part 1 of 2 DIY video shows how to overcome a clogged vent tube on your differential. One of the most common signs of trouble is leaking differential fluid. Jan 29, 2024 · A rear differential leak occurs when differential oil escapes from the housing, leading to potential lubrication issues. Does anyone have a ball park idea as to how much this repair cost? That’s why it’s important to be aware of the symptoms of low differential fluid levels. I'm not sure if it's just the cover an/or the pinion seal yet, I'll have to get a closer look this weekend. These should be replaced at the same time the hub oil seals are replaced, but often they are neglected. Let’s briefly look at the factors that can deform or deteriorate the rear crankshaft seal. If you notice any of these, have your differential checked by a qualified mechanic. Knowing the symptoms and signs of this type of leak will help you quickly identify and address the issue. Depending on the size of the leak, it may be okay to drive with a leaking axle seal, but not for very long. To check for a leak, follow the drive shaft to the rear axle, then look around the yoke for fresh oil. Consensus on the forum is that the leaky seals are related to the diff vent not working properly (pressure builds up and doesn't vent, pushes fluid past May 7, 2011 · Howdy all, I unclogged my differential vent tonight and I want to share some information I was not able to find on my own. Jun 14, 2022 · Experts state that rear differential problems in your Ford F150 have two main symptoms. Just wet all the time. no leak now:thumbup: Apr 30, 2020 · Remove both rear wheels; Remove both rear brake calipers; Remove the rear wheel hubs and fold out the way; Remove the diff cover and drain the diff; Remove the rear axles; Replace the seals; Do all the above in reverse to put it back together again. Aug 26, 2011 · 1999 to 2016 Super Duty - Rear Pinion Seal Oil leak - Fellas, I have a F250, 2005, FX4, 6. Noise leaks etcTop5autorepairsSubscribe Mar 12, 2018 · The fourth-generation F-body is equipped with GM's 7. My last 3 trucks have been F150 Lariats and 200k miles before selling, but never a diff leak on them. Apr 7, 2021 · Apparently pretty common, especially with the EcoBoost. Nov 5, 2023 · If the cost of repairing or replacing the rear differential in professional service centers seems hefty, you can consider outsourcing the task to independent mechanics. Make it a habit to measure your vehicle’s differential fluid level or have it done every other oil change. If you find fluid is seeping from a differential or axle seal, you might only have to replace the seal. Where the driveshaft enters the differential is where you’ll find this seal. Visit Us 20540 88 Ave Suite 102, Langley Twp, BC V1M 2Y6 Nov 4, 2021 · A rear-end differential is found on cars that are rear-wheel drive. Figured I did something wrong. The degree of the front differential leak determines how risky it is to drive while experiencing it. Please check out my sho Jan 24, 2022 · Check Where the Leak Came From. The price of a rear differential seal replacement can vary depending on the vehicle that you own. Vent still attached and not clogged. Spray brake clean to clear out oil. A rear differential leak is a serious issue that can cause extensive damage to your vehicle. So, to determine the problem is causing exactly the vehicle speed sensor you’ve to diagnose the issue. So I jacked the car up and slid my new Race Ramps under the rear tires. This blog covers a simple process for diagnosing the rear differential for a differential leak, pinion seal leak, or axle seal leak, and how to fix it if the rear is leaking. Low differential fluid level. It is linked to the transmission with a driveshaft. In some situations, you might notice leakage from the seals of the axles. If you see red fluid leaking from a car and you suspect an axle seal leak, watch out for these Oct 15, 2007 · You might also have a leak at the o-ring seal on the other end of the axle where it meets the differential housing. Most engine oils Jul 7, 2015 · 1. Install a new rear differential vent cap. Aug 5, 2021 · Overall Thoughts. Four-wheel and all-wheel drive vehicles include a rear differential as well as a front differential that is driven by a transfer case and driveshaft to turn straight axles or CV shafts that drive the front wheels. 7 L / 4. It was sometime last month I had the Pinion Seal replaced. Mar 29, 2023 · The differential transfers power to your vehicle’s wheel from the engine, allowing them to operate individually from each other. But why? Jan 22, 2024 · What causes the rear main seal leak? Many factors can cause the rear main seal to leak. This forum has been a huge help. Nothing came out but the fluid Nov 18, 2007 · 2006 Mustang GT Rear Differential Leak Jump to Latest 21K views 13 replies 5 participants last post by stlwagon Nov 25, 2007 Aug 27, 2011 · I just fixed a leak on my Falcon 8 inch pinion in the basic same method cranky mentions. Oct 25, 2016 · The axles have a seal and a bearing. 2L CCSB today and noticed the stain on the diff cover. Differential oil usually has a distinctive smell. Step 1: Lift the vehicle with a four-post or two posts lifter, as the case may be. The symptoms of low differential fluid levels include a noisy differential, difficulty shifting gears, and increased wear on your drivetrain components. e. The worn-out or damaged bearings in the rear differential can eventually lead to decreased performance and increased friction. It does not seem like a uniform issue though, I read many other folks with this issue but a different problem and different symptoms. Feb 17, 2022 · About 6 months ago I bought a new 9" housing and axle kit for my 26 T coupe. Axle seal leak Symptoms. Sep 12, 2022 · 2015 - 2020 F150 - Pinion Seal leak - New to me 17’ 5. Let’s look at what a rear differential is and what can However, a few factors can cause a cv, differential, and axle shaft seal leak. $200 independent shop to replace seal only. Remove the wheels and the rear Inspect the differential housing and driveshaft for fresh differential oil residue. May 27, 2021 · 2017+ Super Duty - Rear Differential Leak????? - I happened to look under the rear of my 2020 STX 6. Worn Bearings. If the gear oil runs low or becomes excessively dirty, it can cause the gears to whine or howl as they turn. ford nine inch , chevy 12 bolt. Sep 6, 2023 · The average cost of repairing a faulty front diff leak or rear differential is determined by the severity of the damage. You will know the axle seals are bad because gear oil will drip down the tires Dec 4, 2002 · Explorer, Sport Trac, Mountaineer & Aviator - '99 Expl rear differential leaking - I've got a 1999 Explorer that has a rear differential leak. I wonder Dec 20, 2022 · Symptoms of a Rear Differential Leak. As for the differential, the TSB 12-8-15 was performed for the rear drive axle vent leak. In this blog post, we’ll outline the different types of rear differentials and discuss the symptoms of each. $420 for Sep 4, 2023 · The above symptoms can be seen for several other issues as well. The center differential splits the torque between the front and rear differential inputs, which each then split the remaining torque from left to right. 0, only had truck a about 3 weeks, been looking around for any issues, thought my rear was leaking, turns out to be that common rear seal leak. My brake guy noticed the rear axle seal is leaking and said he has an 04 that did the same thing. Nov 19, 2006 · I noticed the smell of rear axle lube when I drove my truck 50 miles on the freeway last Tuesday. Feb 5, 2016 · Whining Rear Axle with Ford Limited Slip (LSD) Differential I have a High roof Extended Transit Van ( 3. I have been noticing some significant leaking coming from not my rear main seal itself but the knuckle (universal joint) the drive shaft connects into right before the diff. From researching, I concluded I must have a rear axle seal leak possibly from a clogged air vent tube. There is a small amount of oil leaking from the banjo. 5. Front-wheel drive cars have a front-end differential (sometimes called a transaxle). Cars with four-wheel drive have both, which means you’re prone to a rear differential leak as well as front differential leaks. Signs Your Ford F150’s Rear Differential Needs Repair Leaking fluid. com seats with charger console lid, XPEL Prime XR Plus 70% nanoceramic tint, Builtright rear seat MOLLE racks, bed racks and dash rack, integrated WeBoost Drive Reach, Fab Fours Black Elite front and rear bumpers with "custom" aftercooler If so, something is probably wrong with your rear differential. The differential/rearend was rebuild many years ago. Nothing severe mind you, but just enough to make a mess of the garage floor. Has anyone had a similar stain and did it turn out to be a problem? Jul 21, 2021 · A vehicle’s differential is a complex assembly that transfers and manipulates engine torque being sent to the drive wheels. differential cover seal). A leak or regular wear and tear could cause this issue. then get a seal puller or something like this Lisle Seal Puller 56750 and remove the old seal, prep the new seal by applying oil on the rubber mating surfaces, if additional sealing is desired you can add a thin layer of RTV to the metal contact sides of the seal. You won’t need to replace the brake parts if no fluid leaked onto parts like the emergency brake shoes and they’re in Jun 10, 2024 · A rear differential is colloquially called a “rear end” or rear diff by some people. When you take the driveshaft out, there is a single bolt and the seal Dec 11, 2022 · Where Do I Check for Possible Differential Fluid Leaks? The differential oil can leak from a total of five separate locations. . Jan 27, 2018 · In this video we'll take care of the rear axle differential in the 1992 Ford F53 Motorhome. Silly cone the snot out of it, reset the nut and stake it in place. Clean the Differential. If your axle is leaking "big time", though, the diff is probably overfilled or else the breather is clogged. If your vehicle is rear-wheel drive, it has a differential in the rear that connects to the transmission with a driveshaft. A bad rear differential can cause a lot of different issues, and it’s crucial that you get it fixed as soon as possible. The larger gear will spin when the driveshaft is turned. Just startin to get tired of problem after problem, I loove this truck, but Can only take so much,. 2. 3. Norlang Auto Repair Langley. . 200,000 miles—and I noticed the rear axle is leaking from the Feb 27, 2023 · In fact, the term transaxle can be used interchangeably in these vehicles to describe the differential or transmission. Average repair cost is $2,100 at 76,700 miles. If only a light residue is found around the cap, this is normal. The purpose of the axle seal is to keep transmission fluid from leaking. Fluid Leak. I purchased a new bearing and seal, pressed them on the axle and re-installed. Additionally, damage to the differential gasket, pinion seals, and axle side seals can also cause differential fluid leakage. Dec 30, 2015 · An axle seal is the part of the vehicle that connects the axle to the rear differential, or the transmission. But sometimes, you must replace the parts, which will cost between $1,300 to $4,150. We’ll also provide tips on how to identify Nov 10, 2016 · Whether your vehicle is front-, rear-, or all-wheel drive, a common component that all vehicles have is a gear differential. Your axle seal has broken, causing the differential fluid to be on the brake caliper and rim. Jan 13, 2017 · The BlueDevil Oil Stop Leak would be able to seal the leaking rear differential on your Ford Diesel. I have just crossed 10,000 miles and noticed my rear axle leaking. We’ll explain this in detail, but before that, let’s see some leaking axle seal symptoms so you can identify when the seal starts leaking. Leaking creates an opening for moisture to leak in. Sep 30, 2007 · The 2005 Ford Explorer has 11 problems reported for rear differential failure. This article does not apply. At the Seal for the Input Shaft. I drove my truck again this morning about 15 miles and crawled under the rear of the truck to take a look. Problem #1) my rear differential has a thick layer of oil on it, but hers the key "" it does not leak oil"“and the oil on it is too thick for it, just to be a stain so please help Dec 24, 2019 · Excursion - King of SUVs - Rear Diff Driveshaft Leak - 2000 v10 RWD. I looked online read a bunch of articles and videos seemed The low fluid level can also cause the rear differential components to wear out faster, which could lead to a bad rear differential. Actually whenever my foot comes off the accelerator. Once again, you’ll have to put your eyes on the leak to determine its origin. These are front differential leaks and rear differential noise. ) The PTU is in constant motion - there is a clutch in front of the rear differential to engage AWD. A fluid leak, fluid contamination, & complete failure are some of the rear differential problems you may have in your Ford F150. West Coast Differentials stocks a complete line of light duty axle parts for Chevrolet, Chrysler, Dana, Ford, GM, Jeep and Toyota and more! Order before 4PM and most parts ship out the SAME DAY! Jan 26, 2014 · He said that to be sure that it was just a minor spill, the technician added engine oil dye to the system and stated that it no longer was leaking. In my case, repair of the original vent tube was too risk and of May 18, 2021 · 2015 - 2020 Ford F150 - Front Differential Pinion Seal Leak - TLDR: After fluid exchange I noticed front diff pinion seal leaking. It uses a rubber lip-type seal to keep gear lube from slipping past the pinion flange during normal operation. While this may sound odd, your car’s wheels rotate at different speeds when you turn or corner, with the outer wheel rotating faster to cover the longer distance around the bend, so they need to rotate independently of each other. Mar 12, 2014 · drop the drive shaft on that end and remove the yoke leaking into the diff. The majority of people, though, pay between $200 and $300. Feb 16, 2012 · 2004 - 2008 F150 - Rear Differential Leak - Newbie here and I am getting a little frustrated with a leak on my rear differential. If you are experiencing differential backlash symptoms or signs that your pinion bearing is worn out and you need to remove a pinion bearing, the following steps can make the process easy for you. Rear-wheel drive vehicles use an independent differential located between the two rear wheels. Rear end vibration. After initial install, the driver's side seal was leaking grease onto my Torque Thrust wheels. Learn how to 1) Check fluid level and remove the fill plug, 2) Re Nov 18, 2022 · Difference Between Leaking and Seeping Fluid from a Rear Axle or Differential Seal No Signs of Excessive Fluid Leaking. The drive shaft enters from the front and the driven axles run left and right by Aconcagua / CC BY-SA 3. Well, the struggle of a bad rear differential is very pathetic that won’t let your truck work smoothly until you fix it. Dec 29, 2011 · I have a 2005 F-150 V8 4. 4. I think I have a leak in my rear dif seal and I plan on removing the cover and replacing it. If you notice fluid leaking from the bottom of your car, it may indicate a problem with your rear differential. Usually, if you have a leak at the rear of your vehicle and it’s rear-wheel drive or all-wheel drive, it means your differential is leaking. Marked the nut, pull it off, pulled the yoke off. If you Apr 2, 2021 · Hi, while I too would like to drill and tap a drain plug. It’s at 57,500 miles and when I pulled into the garage today I noticed the diff fluid leak. Some posts on this board historically recommend to check and replace the rear diff speed sensor first as a potential fix. Most of the time, repairing will fix the issue. has a small leak, it seems to be coming from where it's connected at the bottom. Feb 12, 2023 · The average cost to repair a rear differential ranges from $500 to $2,000 depending on what you drive and where you take it for repairs. For Auto Repair Call Us (604)888-8681. Best workaround is re-sealing the cover with RTV, and also adding the Van Compass diff plate which acts as a stiffener. Dec 13, 2019 · 2017+ Super Duty - Rear Diff Level check - Decided after 4k miles of break in to just pull the rear diff plug and check the magnet and clean it. The whining or howling is caused by lack of lubrication and may May 4, 2022 · Thus far: RF component speakers and 8" sub in Ford enclosure with RF amp, full cab Dynamat, Leatherseats. Typically, the main cause of rear differential fluid leakage is damaged seals. 5-inch 10-bolt rear axle. Lose the propeller and the flange. Below is a list of signs suggesting that it may be time to get a new rear differential: Grinding or whining noise; Tire damage; Vibrations during acceleration; Poor handling while turning; Differential fluid leak; Related Maintenance Services Aug 3, 2021 · If you notice oil spots under the rear of your car or truck or dirt and a greasy film is collecting on the undercarriage, you may have a rear differential leak. fd uu ej zm ji ka vo xr ci nb