It only does this when decelerating never while accelerating. May 18, 2017 · Has anyone replaced the output shaft bearings on their front differential? (Axle shaft bearings) Unless I'm hearing things, my front diff is getting louder and louder. 00. Dec 1, 2005 · Excessive backlash in the differential gears, or worn bearings or gears in the transmission or transaxle will typically make a whining noise that’s loudest during deceleration, but rarely cause a vibration. I noticed a growling noise coming from either the front diff or the transfer case when coasting. Taken it to 3 shops they can't figure it out. Switched it to 4A & 4H but the noise was still there. It's more noticeable when the engine and drivetrain are not under load (coasting). Doesn't do it when sitting still and turning wheel (apparently not the power steering pump or rack). My buddy said it sounded like his 03 avalanche but a lot quieter, his ended up being pinion seal. Turning/braking don't change noise. Completely lost and upset so I brought it to a gear shop and it end up being a rear axel bearing. Damn anyone that drove with me would also swear it was front end noise. Pinion bearing noise will be higher pitched because it rotates at a faster rate. When I’m coming to a stop and get to around 20 mph it makes a low grinding Oct 22, 2014 · was driving down a smooth, flat stretch of highway with cruise on at 70 mph and started hearing an intermittent whirring noise coming from the front, presumably the axle. '11 800 XP - Viper Elite 4000 - EZTSK Turn Signals - Overhead Gun Rack - Backup LED - Dual Lock 'n Ride Storage Bins - Odyssey Aux 925L Battery on 1314 - H. We’ve honestly gotten tired of taking it in, and the dealer won’t replace the transfer case because the TSB specifically says not to do that. See full list on soundproofxl. It is really noticeable at around 20-30 mph. The noise was always coming from the front Drivers side, near the axle which makes total sense now. This can cause uneven outside tire wear, turning issues, and knocking sounds when driving over bumps. 's - 30" LED Front, 10" LED Rear - Diamond Plate Floor Boards - Rear View Mirror w/Compass, Temp & Map Lites - 26" Bighorns - Front Dec 20, 2018 · The front part of the PTU is always spinning; there's a clutch that connects it to the rear differential if the front wheels slip. The pitch of differential bearing noise is also constant and varies only with vehicle Aug 24, 2018 · I made a very expensive troubleshooting repair on my 2003. But it would go away when I turned the wheel a little bit. Put about 20 miles on it and parked it. Feb 15, 2015 · It makes noise from the rear kind of a whirring sound only when I let off the gas and in gear. The differential was leaking at the time, and combined with the additional symptoms, I decided to rebuild. Feb 5, 2011 · Normally the truck doesn't get above 10mph in 4-wheel drive, but with the recent icy weather, I've been using it to get out on the roads. May 1, 2017 · The only issue is that it is making a strange noise which I suspect is either the front or centre diff or the transmission. Me and my dad both thought it was the driver side axle bearing but after opening the differential and removing the axle itself, that doesn't seem to be the problem. The only thing that implicated the differential was a light rumble when coasting in neutral. I lifted the front end up and spun the tire, but it would not make the noise. Aug 12, 2022 · Even with the driveshaft removed and the center diff locked, the front diff is still spinning from the front tires/axles. It was the front differential, not just the needle bearing (sadly). Noises, vibrations and other irregular driving characteristics can often help diagnose a differential or driveline problem. 10 Gears - HP30 4. Just replaced fluids in transfer case and differentials, no change to noise. Only while coasting. Rumbling noise/feel from front end in tight low speed turns (parking lots). I suspect it to be the front differential (as it is where the noise comes). Rode it for a few minutes and changed it again, and problem solved. 5 EcoBoost 4WD Lariat truck. Hi there. Apr 24, 2020 · Used LM 75w-140 diff oil from FCP. If this does happen, it will cause horrendous noise from the front of the vehicle. Apr 3, 2018 · Hi, looking for suggestions on a front end noise. 10 Gears - NP242 - IRO HnT - IRO Custom Drive Shaft - 4. Jul 24, 2009 · -SOLD-1997 Grand Cherokee 5. 60 to 110 kph) • JX1 and RG3: Whine noise while coasting, off throttle, in the speed range of 50 to 25mph (approx. Only does it when applying throttle. However I think it occurs after I have already applied the brakes and let off pressure. Years ago my wife's 500 was making a grinding noise in the front end. The noise does not occur in the first 5minutes or so of driving and progressively gets worse as I drive more. turn drive shaft back and forth, there will be a little play in the diff when changing dirrection of the shaft, but if more than a little, the backlash in the gears , you'll be able Sep 4, 2023 · A bad front differential will also make quite a bit of noise. It's high pitched and also sounds a little grindy. The previous owner said he changed the diff fluid with royal purple 75-90. I think the noise is coming from the front diff wobbling. It sat for a bit after the repairs. the roooooommmmmm sound almost sounds like it follows a cadence between “beats” of the sound. I just need to find a stretch of highway that's relatively curved so I can coast at highway speeds. If you change it to 2wd while coasting the noise stays until you get back in the throttle then it disappears. The noise goes away a couple seconds after touching the brakes. Stopped by schwabs and they said it’s internal in differential. It is not the wheel bearing. Immediately as you decelerate, the noise starts. If too much backlash stores on the gear surfaces. Will also be louder on one side when shifting weight left or right. When coasting or light breaking I can hear a scraping/grinding noise coming from under the Jeep. e. Fastest to search based on my user name. Raise up the vehicle and put it on jack stands. If I push in the clutch or put it in neutral the noise goes away. Please message me offline . Jan 17, 2021 · I have a problem with a hard noise*(like knocking) when coasting with my 2008 CRD Jeep GC (Quadra Drive II). Nov 20, 2023 · The problem you have is with the front differential. Jan 2, 2024 · Defective tires. Potential Feb 15, 2015 · It makes noise from the rear kind of a whirring sound only when I let off the gas and in gear. Feb 15, 2022 · 2015 - 2020 Ford F150 - Front differential issue advice - About a month ago I started to hear what I thought was bearing noise in front driver side. Changed the fluid once and it still made the grinding noise. jack up rear axle, put on stands, put wheel chock/block at front wheel. . I also have a bit of a vibration when accelerating, goes away when coasting, which may or may not be related. The 4th was slightly loose. The ticking noise could be the universal joints on the driveshafts or axle shafts on the front axle. Things done so far to solve the problem (all without any success):-replaced both right and left wheel hub assembly with new Timken's-replaced both right and left axle U-Joints-replaced all U-Joints and double cardan cv ball on front driveshaft-removed front driveshaft Sep 24, 2009 · The 4wheel drive worked so I took it back to the main building. The noise is easy to hear around 30mph and faster, but too quiet to hear any slower. It was a very faint vibration, kind of like driving over a more coarse road surface. Same going uphill. as the truck slows, so does the time between the knocks). Only way to fix is new diff (well, I suppose you could tear down your diff and replace some parts), it's expensive. Oct 1, 2018 · I swore that the whine and rumble were coming from the transmission; the whine was when on the gas, the rumble was when off it. Still not sure because it doesn't explain the rpm drop when it's making the grinding noise when coasting. This noise began a couple weeks ago but the noise was quiet but began to grow louder in the following May 20, 2019 · The bearing noise travels up the driveline, thru the transmission and into the motor which transmits the noise thru the transmission and motor mounts into the frame which gives the sense that it may be a right front wheel bearing. It is now making a thumping noise in the front end, which is very pronounced at low Nov 8, 2016 · I'm in similar boat as my front diff started making noise at 138K. Feb 1, 2022 · 2015 - 2020 F150 - 2019 f150 groaning/humming noise front end - Link to video reference the link - noise coming from the front end, when coasting under 80km/h. The ticking noise could be the universal joints having the bearings burned up causing the caps to move around on the joint. The noise to me sounds like a CV going bad coming from the front and somewhat around the center of the truck. 43 60' Jan 24, 2024 · Just checked the diff fluid in the front and rear. Oct 21, 2022 · Hello Forum: I have a 06 Yukon Denali AWD 6. 3 powerstroke with a front end grinding noise. The noise is most noticeable when coasting or decelerating. This hasn't solved it and in fact it's louder now. On my way home I noticed a rotational grinding-rubbing noise that seems to be coming from the front end. Nov 28, 2009 · Noise is still there. If the grinding noise is coming from the tires, then the most probable cause is worn-out bearings. Nov 3, 2014 · After pulling the fuse so the front drive was disengaged, the noise completely stopped. In this Tech Tip video you'll learn about why your rear end or front end differential may be making noise While sudden, catastrophic gear failures are exceedingly rare on standard applications that are not abused, most differential failures involve whining, grinding, or rumbling noises either upon acceleration when the differential is loaded, similar noises when the vehicle is coasting, or in severe cases, a rumbling or grumbling noise when the Oct 30, 2023 · The front axle disconnect replacement fixed our noise for cold weather, but it still happens on wet pavement. At first I thought it was wheel bearing or axle related since I had just paid a mechanic to replace the front right bearing/hub/axle in October since I was getting a very similar sound. I have already replaced the IWEs twice. Dec 14, 2022 · Diff noise when coasting; Diff backlash noise; Diff front end clunking noise when going over bumps; Diff clunking sound when driving; Probable Reasons. Other symptoms of bad Mercedes front differential include. Jan 23, 2024 · Now this winter the noise has returned with the colder weather… vibrating/groaning with braking and slow coasting. When an axle is bent, the tires will not be able to hug the road evenly any longer. Worn-out differential bearings also can be the cause behind the noise. I did notice that once I removed my diff drop kit the noise settled down a lot, about half the volume. However I did notice the left front wheel seems to have lot more slop in the outer cv joint than the right Nov 28, 2009 · Noise is still there. 2 Limited - D44a Trussed 4. It doesnt do it at any speeds less then 65, and only while off the gas. Recently I noticed a grinding noise from left front side when decelerating at 40 MPH. Maybe. It is present at all speeds and very loud when I let go of gas. This can happen if the knuckle is pulled down and away with the axle attached, for example, potentially pulling the inner cv joint out of its position. Grinding while coasting, and whine at highway speeds. I experimented with driving in both 4 and 2 wheel drive and in coasting downhill at idle. Worn or damaged differential bearings usually produce a low pitch noise. Mar 16, 2011 · It was the front drive shaft. topped off gear oil, only took about 2 ounces to top it off. It may be there at other times but I can’t hear it. sounds abit hard to believe but this is what my experience has taught me, and education is expensive. My Treg is a DD for my wife and I'd like to minimize the downtime. When going under 10mph I have a noise that sounds something like a metal object being banged Dec 31, 2012 · 2006 Toyota Sienna LE 77K miles. 2004 f150 5. Any thoughts? Aug 11, 2010 · have been noticing a whining / whirring noise coming from rear diff lately. Oct 20, 2016 · 2008 JK, no front drive shaft (will be replacing with an Adams soon), brakes are fine, I DO have a leaking axle seal on the front passenger side, been leaking since I bought it but the noise just started a few weeks ago. I can only hear it when I am coasting with the ticking noise matching the car's road speed. Except this one 80 series thread which pointed to T-case and their noise went away after replacing T-case. Apr 8, 2008 · It's your front diff. Do you think the diff is bad? I read that not enough preload on the pinion bearings could cause this noise. Feb 26, 2018 · You know why when geese fly in a V, one side of the V is longer than the other? More geese on that side. Do the sounds change pitch when you apply or remove power, this is a common differential noise. Again the noise goes away with acceleration and higher speeds. The noise only happens when the truck is MOVING. The noise intensifies at higher speeds. So, to me, it doesn't sound like the PTU. Very weird noise. The last 10K miles I have been experiencing a rhythmic sound from the front end. D. Did the other front side last fall. Couple years ago we had the same issue, it was the front drive shaft. When accelerating, weight shifts to the back, off the front wheel bearings, reducing the noise. Feb 17, 2019 · 2015 - 2020 Ford F150 - Gear Noise while slowing down and low speeds - I have a 2015 3. visually inspected and dont see any fluid coming from pinion. If you’re hearing grinding, clunking, howling, or shrieking while you drive, it may be a problem with your differential. Could feel it right under my feet while driving. Went away in 4x4 as well. Diagnosing differential noise can be problematic since it can be hard to tell the difference between a differential needing attention and a failing wheel bearing. I sent you a PM to see if you'd be willing to part with yours. I've replaced the front driver's side half axle with no relief, so it's not the CV joint. Jun 15, 2017 · All of them were related to wheel bearings or front diff. Feb 8, 2020 · 1999 to 2016 Super Duty - 99, 7. When the grinding occurs, other than the rpm drop, the 2h button blinks. com Oct 27, 2010 · On a separate "noise" topic if you have a "scraping" noise in the steering wheel when turning search for my posted solution (service bulletin #09-068) to that one too for Pilots model-years: 2006-2008. 0 Litre. A separated axle is an axle that has a cv joint separated from its normal position. Before it would whine l while coasting with the accelerator off at hwy speeds. Checked front diff its got fluid. I can only hear the noise from around 10-20 mph when coasting. I'm just running mine. 8 -1 468 Afr 357's Team G 1000 Demon 4. Has front end howl noise replaced both hub bearings, still there replaced front diff with rebuild, still there. It is the same when in drive and coasting in neutral, so I am guessing it to be in the front end drive line some where. It has a slight clicking noise in the input shaft area of the rear differential with a stethoscope when coasting but no noise under load. It doesn't make that noise always. When I jacked up the diff I was able to shake/rock it causing it to move a bit. Thought changing over to the genuine BMW diff oil would perhaps solve (fingers crossed) the noise. Drive the vehicle to inspect the vehicle for the rear differential noise. I would do three things: 1) Leave the tires on, have a helper give it 'gas' and carefully put a long broomhandle to behind the front pinion bearing and other end to your ear. Jul 11, 2010 · 71 SS 454 11. The noise is completely gone at any speed lower than 65 mph. with trans in N, and engine off. I tightened them down good. I was unable to remove the differential’s fill plug, and I had a spare diff in the backyard, so I pulled it and swapped diffs. Mostly I hear it at 30-40 Mph coasting to a stop (engine not under load) and also if I put it in neutral and coast along. Thats the only place I can hear or see anything. Nov 11, 2023 · 2004 - 2008 Ford F150 - Knocking noise from the front axle - For the 13 years I’ve been able to find all my problems from the search options on these forums. Had typically only last for 3-4 stop signs (approximately 5-10 mins of driving) but now has persisted for longer periods and have noticed vibration/groaning at higher Feb 2, 2022 · 2015 - 2020 Ford F150 - 2019 f150 groaning/humming noise front end - Link to video reference the link - noise coming from the front end, when coasting under 80km/h. Apr 22, 2008 · After the turn I started hearing a clicking noise coming from somewhere towards the front of my car. Aug 17, 2014 · I was thinking it could be the actuator on the front axle because I can feel the motor in it spinning but it doesn't make the clunk when it engages the axle to the wheel. Mine is a 2017 with 60k miles so really out of the ordinary. It sounds like an airy squeel, or shreak. Driveline, Axle, Ring and Pinion Gear and Differential Noises and problems can sometimes be tricky. It seems to occur during a slow speed deceleration, like coasting to a stop but not yet applying the brakes. How To Fix Knocking Noise From Front Wheel When Driving. Put it in 4 wheel drive and notice that it quiet's up. The rear diff was about 1” - 1 1/4” below the fill hole and the magnetic plug had some gray sludge on it and very few fine metal shavings but nothing more than I Mar 16, 2023 · 2) Humming noise from front end during high speeds 60-70MPH and is most prominent around 65mph on days above 32f degrees and is easily to hear. However, I am extremely happy that this was not the transfer case which is actually at the back of the transmission. Apr 13, 2016 · Maintenance Shop - Front differential noise - My 03 fx4 supercrew is making a grinding noise but I can only hear it when I'm coasting at low speeds. The true test is to open up the front diff. If you detect audible gear noise, check the lube levels in the differential, transmission or transaxle. Wheel bearings are good, no play in wheels when jacked up. Jan 14, 2011 · While decelerating (coasting or very light braking), under 20 mph, have a rhythmic knocking noise eminating from the front end. Nov 13, 2010 · Now, my FSM does talk about differential noise, and separates it into bearing noise or gear noise. The FSM also talks about sound that you hear only when coasting, and advises that it this may be a damaged bearing of the bevel pinion. 2014 Flex Limited in Tuxedo Black, 303a with all options. 3 Front end grinding noise. It has later gone to 10 to 30 coasting and lately it think I can feel the grind in the wheel and have heard the grind when I'm just going say 50 but not gaining speed. The sound is not audible when I am accelerating, it actually disappears. In the spirit of Piloteering please come back and post your solutions as you have successes Jan 30, 2018 · As for if the noise goes away when turning, its hard to tell as the noise is only apparent when coasting at 70 mph. The noise I have is only during coasting, and goes away when accelerating. My right front is whining and maybe grinding a bit now. They were making a noise again but the IWE binding seems to have stopped for now. The reason I heard the noise was when coasting the shaft wasn't spinning and was able to move causing the noise. Own it since new. Are there metal flakes in the fluid? Also take a stethoscope to the diff while on the lift. May 8, 2013 · '06 that is nearing 102k miles and now a front end grinding noise has appeared that changes pitch with wheel speed. The first time, I told a different shop the noise was coming from the front and they repaired the rear differential, replaced bearings to a cost of $650. I figured that is textbook Mar 26, 2012 · I'm not a mechanic, but this tells me it's a wheel bearing. Before I begin to take things apart, anyone have an idea where to start. Oct 18, 2019 · 2013 Outback, 57,000 miles. The guide below will help you match up the noise you’re hearing with the differential or axle component making it—or at least get you in the ballpark. The CT congested traffic never helps, either. The noise is not noticeable from 0-15mph and is only noticeable from 15-40mph. - I’ve got a 99 7. anyone have any ideas as to what Mar 2, 2009 · I'm increasingly worried about what I think is gear noise coming from the front end of my B6000. (front diff is always turning as there are no lockouts right?) It almost sounds like belt squealbut its definitely coming from the transfer case area. May 13, 2019 · 2nd Visit - Said that my front diff bearings were making noise (Changed Diff Bearings) 3rd Visit (month later) - Still making noise, sometimes in 2H as well. 80 to 40 kph) Dec 20, 2018 · The front part of the PTU is always spinning; there's a clutch that connects it to the rear differential if the front wheels slip. The front fluid was about 1/4” below the fill hole which seems normal and the magnetic plug was clean, no metal or sludge. I believe that is where the noise was coming from. Does it turning both right or left. Mar 6, 2023 · I have a light grinding/hum noise from the front end when coasting, but it goes away with even light accelerator pedal depression. May 11, 2018 · The noise has been present whether accelerating or coasting in the speed range of 54-75 mph and has been rhythmic (I. Hubs are Timken and fairly new, noise does not travel with tire rotations. Rear differential noise when turning and front diff noise can be a result of loose gears. Check for backlash in the diff. Any slow turn to the right caused a low rumble from left front. Ultimately, when I disassembled the differential, the passenger side carrier bearing/race was pretty well pitted, while the rest of the races, bearings were fine. This droning noise also completely stops when you accelerate. Dec 23, 2011 · I noticed the other day on northway coasting at 75mph I get a light vibration/ noise that I can best describe as ridding over rumble strips. Made an appointment (3 weeks out) and was told best if don’t drive it much. Took it for a spin and there was whining/moaning sound from the diff when in gear and not accelerating. The ADC is very sensitive to dirty oil. One bolt was missing and 2 were halfway out. When I slow down, say for a stop light or stop sign, I get a low level but very noticeable vibration. It was intermittent at first after a few weeks it was more reproducible. No one believed me that it could be the diff…yet it was lol I kinda had to push for them to look at it just to humor me. I would think the cop siren sound is more like a bearing. The noise picks up when coasting or going down roads with a steeper grade. Mar 11, 2013 · There is no change in the noise or attitude of the truck when driving in 4wd. Having seen what would make a knocking noise on front wheels, let’s look at how to fix them. 10's TH-400 4000 4000 lbs with driver pump gas all day long Best pass to date on old combo 1. Dec 13, 2019 · My 2001 Sentra SE manual with 195k miles and original clutch has developed a SEVERE noise in the front end. 5" lift - JKS Quicker Disconnects - Dec 30, 2022 · 2015 - 2020 Ford F150 - 2016 Front Differential Noise - I have a 2016 Lariat with about 103,000 miles on it. ) Noise still appears, especially in the morning within 2 minutes of driving. No indication of an Dec 29, 2023 · The driveshaft does have some forward and backward movement back toward the read end under load and toward the engine maybe 1/4inch when coasting. It's loud! I have tried a few things, I changed the gear oil in the front differential and in both wheel gear cases with what I thought was a better oil. Since it is making noise coasting and decelerating, it should still make noise with or without the driveshaft. It will take the dealership 2 to 4 weeks to fix and most likely they will rebuild the unitnot replace it. Sep 15, 2016 · $1897 for everything including a ridiculous $28 axle nut. The symptoms are: Whirring/grinding noise when I let off the gas or apply the brakes Noise stops as soon as i touch the gas pedal Happens at all speeds Noise is speed related, ie as the car slows down the noise also changes Rear Differential Noise Inspection 1. • JK1: Whine noise while gradually accelerating, in the speed range of 37 to 70mph (approx. Jan 24, 2016 · I think what I did was get all new grade 8 hardware for the differential drop and longer bolts. Apr 6, 2016 · I've been hearing this rhythmic low frequency rumble noise from the front end for a few months now, but it's getting worse! At first I thought it was a unbalanced or unevenly worn tire, because it's the same noise, but a tire rotation didn't change it. It is like a light scraping or metalic Feb 14, 2016 · I think I'm having a noise coming from front differential, possibly bad bearings and seals. I changed the front differential oil and I also checked it. 4 4x4 with 174,000 miles. and check the u joints at 100k they are done if original ujoints most likely. I say rhythmic b/c it is not random, but tied to vehicle speed (i. Guess what, no luck. If you put your truck in the air and put it in 4 wheel you'll see your front diff probably moving a lot. . If the pinion gear is tightly meshed, it can make a noise. May 16, 2023 · Hi, recently my 2016 Cherokee Trailhawk V6 began rattling/rumbling/grinding noise coming from under the front car. I figured that is textbook Mercedes-Benz front differential bearings may fail on vehicles equipped with 4Matic. Aug 6, 2020 · Sounds like a light clacking, with a chinging noise (almost like key chain rattling), does this when driving straight at all speeds, not any worse when turning. Aug 9, 2007 · The 4 bolts that attach the drive shaft to the rear differential were at fault. You may need to do it more than once to get it flushed out. It just happens randomly when coasting. Jan 6, 2018 · Definitely change the fluid. So I had a buddy install a drive shaft from Detroit axle. Feb 24, 2012 · The dealer brought in a specialist and they determined it was the t-case and front differential so they rebuilt the t-case and replaced the front diff and housing with a new assembly from the factory. Ehhhhh I bought this for my business-!!!! Jan 10, 2018 · For months I had this knocking/clunking noise coming from my front suspension - no grinding, more of what felt like a thump/knock at my feet when I would hit bumps and uneven parts of road. Doesn’t happen all the time - this time it happened after a long drive. I can hear it only when coasting and seems to be around certain speeds. Nobody in the house thinks anything is wrong. The ticking noise is coming from the engine bay, not the tires. Inspection under the car revealed nothing unusual, leaks etc etc. Any thoughts on this would be Mar 23, 2022 · The Axle Separates Separated axle joint with boot removed. Since there is noise only when AWD is active, hence front wheels engaged, I would expect the noise to be coming from the front diff or front drive shaft. I'm looking to source repairable diff for 04 V8 that I can rebuild prior and then do a swap over a weekend. I’ve met my match today! It’s. Noise: Howl while decelerating (gears previously quiet) Cause: Loose pinion bearing preload Jan 4, 2023 · I have this exact type thing going on- 2022 ram 3500, approximately 2500 miles and noticed howl- grind type noise in front axle. Sep 22, 2015 · Gear noise from your differential can be worrying. Mar 7, 2018 · I was greeted on my New Year with a groaning sound coming from the front on my Expy. Driver side, I think although it’s hard to tell. Accurately diagnosing differential problems is an important step to avoid doing unnecessary work and spending extra money. May 29, 2008 · Sometimes, the noise is not differential-related, but is caused by other driveline or axle components. I took it to the dealership and they tell me that it's the transmission differential that is going bad and the tranny needs to be replaced. anyone have any ideas as to Jan 26, 2011 · Noise occurs when accelerating from a stop, worse if going uphill (more load), is proportional with vehicle speed, then goes away at fairly low speed. I replaced the lower and upper control arms (new bushings on the control arms too), inner and outer tire rods and sway bar links. Jan 8, 2013 · Those rear wheel bearings/diff sure don't sound right. Sep 9, 2019 · This noise changes only with vehicle speed. Positioned within the wheel hub, the wheel bearing ensures that the tire spins smoothly by minimizing friction. Only to have the same noise leaving the shop, they said well we can look at the front for Jan 20, 2011 · The Noise only happens when i'm coasting or just letting off the accelerator. My first thought was to check front diff fluid level and the front drive shaft. In the last week I've done front and rear diff, tranny and transfer case fluids. Mar 15, 2018 · 2009 - 2014 F150 - 2013 F150 Ecoboost 4x4 front end grinding Noise - Ive got this grinding noise that started out coasting at 40 MPH and below. Not when revving in park. (Changed Diff Bearings again. I. I went TWO YEARS! with this and one dealer that had no clue. Steps to diagnosing differential noise. Differential bearing noise is similar to pinion bearing noise. mh qn pq yk ku le sn aa vp mw