I got a new to me truck. It's a 2004 F150 Lariat 4x4 with the 5.4L. It's got a whine that I believe is coming from the rear differential. I'm going to change the fluid. My axle code is 26 which I believe is 3.73 non-limited slip. My owners manual says to use 75w-90 but I've seen a lot of posts on here that say to use 75w-140. Which is right or better? Also, is my rear differential the 9.75"?
View 14 RepliesWell i picked up a 96 4x4 with the 4.0 a few weeks ago and been fixing stuff weekly that i find wrong. One thing i noticed was the rear diff was leaky but couldn't get the fill plug out so left if for now. Last night my wife was on interstate and it just started making a loud noise so she pulls over calls me. I get there and drive it and it makes a woowoowoo noise and it got louder as speed increased. She was 3 miles from the exit so i drove it about 15-20 to get it off interstate than another 2 miles to her sisters. We let it sit for a few hours and found a flatbed to haul it home, and when we finally got home i drove it off the flat bed and now it was making a loud clunky noise. Parked it in drive till today. Cracked open the rear and no fluid came out.
Inspecting all the gears looked good no metal in bottom so i went and got a new rear cover and 3 qt. of fluid. Put it back together and the woowoowoo was still there but seemed to slowly go away as i drove it around the block. So what else could be going on here or do i need to drive it and warm up the fluid so it circulates? I also noticed a sheeee sound like metal on metal when braking but i changed all 4 rotors and both pads last week but i noticed the brakes in the rear that look like drum brakes was bare but i assume that is only for the ebrake so didn't bother changing them yet. Could those be hitting the inside of the rotor and making the metal to metal noise?
i have a 96 ranger 2wd with a 2.3l engine and a 5 spd manual. everything works except the rear diff whines a little under load. putting new bearings in doesn't look to difficult that's what i will plan on doing but first i need to take the cover off and need to know what fluid to put in?
View 9 RepliesI have a 2007 ford f150 FX2 5.4 with 3.55 limited slip rear end. It has 68,000 miles and would like to change the rear differential oil. I have read and I know the oil it requires is 75w-140 plus the friction modifier. I would like to use mobile one. But was reading and the mobile one sites states that is already has friction modifiers. Is that ok to use on my truck? Using mobile one and not adding the extra modifiers?
Also some other brands say they have friction modifiers as well. Should I use mobile one and add extra friction modifier or just go with what it has already?
Mobil 1 Synthetic Gear Lube 75W-140 LS contains special friction modifiers designed for limited slip-type differentials. In most applications, the addition of special LS (limited slip) additives is not required. For axles requiring the highest level of limited-slip performance, OEM specific LS additives can be added to this fluid.
So I have the dreaded rear diff whine, which started about a month (1000 miles) ago. I've read a bunch of the past posts, but still can't find a solution other than a) live with it, or b) spend $3500 for a whole new diff. (95k miles - no warranty) It seems the general consensus is that the problem stems from a loosened pinion nut. Is there no way to just tighten the nut? Or if I do will the whine continue because the gears are now worn? BTW I just had all the diff and tranny fluids changed. Made no difference.
View 14 RepliesAlright so about a few weeks ago I started hearing what sounded like it was time for new brake pads. But the other day I turned the corner and my neighbor came up to me and said he heard my truck making a metal on metal type noise. So I said okay fml, took it to a local mechanic.
Called me today and said the brakes are fine but it's rear differential, he said they put the truck on the lift and used the stethoscope and heard a metal noise inside the rear differential and said that the fluid in there was very metallic.
I bought this truck about 7 months ago from the dealership. It has a total 90,000 miles on it. What does it look like this could cost me worst comes to worst?
I have a 2006 fx4. And I am about it change the rear differential fluid. i want to know if i have a a limited slip differential.
View 7 RepliesI am getting a little frustrated with a leak on my rear differential. The leak is on the front of differential rear-end just behind the four bolts you take off to remove the driveshaft. When you take the driveshaft out, there is a single bolt and the seal behind that is leaking. Here is my dilemma, I called my local ford dealership to find out what the torque rating on that bolt is so when I replace the seal I don't over-tighten. He told me there is no torque rating on it because I have to tighten, measure, tighten, measure the bolt. I was lost, I didn't have a clue what he was talking about.
View 6 RepliesNoticed a small whine coming from the A/C compressor? I caught ear of it the other morning when I was putting the trash on the street and the truck was running. It's definitely the A/C because when you cut it off the noise goes away.
View 2 RepliesMy '04 4wd has a pretty loud rear end howl, it is a LS but don't think it's an LS problem, no noises or chattering when turning. Howling is loudest at 50 to 60, but some noise at all speeds. I don't mind tearing into the rear myself, but not sure if I could tell what was wrong just by looking, i suppose bad bearing might be obvious, but not sure how to diagnose gear lash tolerances. It only has 107000 mi. and is an 8.8 rear I believe.
View 2 Replieshad a leaking rear driveshaft seal at the axle and replaced it and fluid. 75W145 full synthetic as recommended. it was changed at 128000 and I've started to get an axle whine over 25 MPH up to 65-70MPH. quites down around 80 MPH. I just checked it after 2 months (whine just started) with 133000. Any TSB. does this fall under TSB 05-23-3? Noise sounds like I've got really aggressive tires on the truck. Only have Dayton HT all season. Did not add the XL3 additive. Would this work at this juncture.
View 5 RepliesI had the rear axle seals replaced less than 1000 miles ago. Now the axle is getting whiny. First I thought maybe that the tires made noise but now I'm pretty convinced it comes from the axle.
With a seal replacement, what do they do that might impact the axle - over tighten the bearings?
I also had the rear diff fluid replaced - perhaps they put in the wrong stuff...
Should I replace fluid and see if that stops or should I simply take it to the dealer and let them deal with it?
Have some 'whine' coming from the rear differential under deceleration. In my case it just started occurring last night and seems to be audible over 55MPH and while in 5th or 6th gear after I let up off the throttle as to engine brake.
It seems like the answer or solution pertains to the input shaft pinion retention nut eventually backing off, as well as oil starvation to the unit, but has this actually been confirmed? My rear diff was replaced over 4 years ago under warranty after it failed and enduring 2 wheel drive for a bit.
I've recently noticed a howling sound coming from the rear end of my f150 from speeds of 45-60mph it goes away as soon as i get to 60mph and starts again very slightly at 80mph. I am sure its the pinion and ring from everything I have read online. a friend told me that it could be the pinion gear is worn out or it needs re shimmed or something. what parts should I look for to get this fixed? could it be a fluid issue? I dont want to have to spend much more on this truck....I love it but it seems like i find a new "noise" every week. Ive always been a chevy guy and to my surprise I REALLY like driving this truck and i want it to work out. What should i expect to pay for a repair like this? BTW it is and 04 FX4 with 84k on it.
View 14 RepliesMy 2004 Ford F150 only has 20,000 miles on it but makes a shudder from stop turning left or right. I asked the dealership about it and was told that it was likely the clutch pack in the rear differential sticking. I was told I could try changing out the fluid while also adding a few ounces of some special lubricant. But, they said it wasn't a guaranteed fix. Apparently, they have tried this fluid change and drive the vehicle in figure 8's trying to get the lubricant between the plates. They also said that this was a known problem to Ford. Lastly, I was told it wouldn't hurt anything to keep driving it. I checked some other online forums for Ford F150 owners and this does seem to be a recurring problem. I'm thinking about having the clutch pack replaced but obviously hate to spend the money if I don't have to.
View 4 RepliesIt may sound silly, but can I lift my 04 explorer by the rear differential to change brakes etc? I have NOT had a Independant suspension vehicle prior to this and dont want to mess up anything. If I cannot use that point to lift it, where is a point to lift it using a floor jack so I can service the rear of the vehicle after I place it on jack stands?
View 7 RepliesWorking on a 2004 Ford F150 4.6L. No 4x4. Replaced both IWE front actuators. (Neither one would hold vacuum). Still no 4x4. I realize I have vacuum issues and may be excessive wear on gear teeth of the front wheel bearings. The issue that really bothers me is the front differential. Having placed the truck on jack stands and running in 4x4 should both front wheels be turning ? The right front wheel turns and the left front does not move. Is this normal or should I pull the front differential cover off ?
View 7 RepliesMy front differential is leaking. Are there any special Ford tools required to replace the seal? Or is it simply bolt (and fluid) removal, seal replacement, fill with new fluid. Any tips or heads-up on this?
View 2 Replies06' F150 4x4 XLT SCrew 29K-mi
I have a rattle of some sort I can hear coming from underneath towards the rear while under acceleration. Usually hear mostly at certain RPM and not through entire accel to hwy speed. Do not hear it while in Park and reving engine, but on the road I hear it. Mostly I think after it gets hot or something.
No driveability issue only rattle? While I was reving in Park I could hear a bubbling after I let off the pedal. Is that normal. I don't think it is the same noise/rattle.
OK so I noticed the last few weeks that I have just a small shutter coming from my rear end every now and then. It feels like it locks up for just a sec and then is fine. It will normally do this earlier in the day and maybe once or twice. Is this telling me its time to add some more friction modifier into the rear diff or do I have another issue. I don't notice it once the truck is warmed up and been driving around some.
2006 F150 Screw Fx4
So I went to the car wash this morning and when I pulled into the stall I heard a somewhat loud rattle coming from my front drivers side wheel. It sounded like there were a couple stones in the cap that covers the lug nuts. That wasn't the case. It did it in reverse also. Before I take it to the dealer Monday morning. Its a 2011 F-350 6.7 Lariat 4x4 w. 32,000 miles. I also have have a little whine coming from the rear when I take off from a standstill.
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