Ford

Have Ford Questions? Ask a Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

Ford

After changing the rear diff. Fluid, we hear a random noise.

Customer Question
Changed fluid again and added...
After changing the rear diff. Fluid, we hear a random noise. Changed fluid again and added the ford modifier with same results????
JA: The mechanics have tons of experience in that area. Are those all of the "symptoms"?
Customer: Yes
JA: Anything else I can tell the Ford Mechanic before I connect you two?
Customer: Not really, it's very confusing
JA: Got it. Let's get this figured out. I'm sending you to a secure page on JustAnswer so you can place the $5 fully refundable deposit now. While you're filling out that form, I'll tell the Ford Mechanic about your situation and connect you two. You'll be on the road in no time.
Submitted: 1 year ago.Category: Ford
Show More
Show Less
Ask Your Own Ford Question
Answered in 7 minutes by:
4/8/2016
Ford Mechanic: Ironmike, Ford Technician replied 1 year ago
Ironmike
Ironmike, Ford Technician
Category: Ford
Satisfied Customers: 3,388
Experience: 30 years ASE Master tech L1 . Ford master
Verified
greetings,could you tell me what model ford you have and if it is 4x4. could you try to describe when the noise occurs better. Like on turns, on acceleration, over bumps. is the noise a buzz, grind, chatter and are vibrations felt and where.was the noise there before the fluid was changed? what did the fluid look like?
Ask Your Own Ford Question
Customer reply replied 1 year ago
99 explorer xlt awe 5.0 L, the noise is random and under acceleration. We did not have the noise prior to changing the fluid. The fluid was the original and very low because if a leaking cover
Customer reply replied 1 year ago
After eating my response, just to clarify, it's an all wheel drive
Ford Mechanic: Ironmike, Ford Technician replied 1 year ago
what fluid did you use and how much modifier? did the fluid show signs of metal? how is the transfer case fluid?are the tires all with 1/4inch in outside circumference? if the clutches needed new fluid and modifier to grab it could be causing the sound from somewhere else. The best method to isolate or pin point a drive line noise would be on a lift. 4x4 drive line noise even harder to locate with no lift. bear with me on the questions
Ask Your Own Ford Question
Ford Mechanic: Ironmike, Ford Technician replied 1 year ago
sounds will travel through the drive shaft
Ask Your Own Ford Question
Ford Mechanic: Ironmike, Ford Technician replied 1 year ago
could be chatter from the limited slip clutches. tag on the differential will have a L if it is limited slip. carrier has to come out to replace the clutches.
Ask Your Own Ford Question
Customer reply replied 1 year ago
Our explorer is an automatic, our tires only have about 15,000 miles on them. I used Lucas 75 / 140 sun with 4ozs. of ford modifier. The old oil had some signs of metal, not to bad though with 200k miles. Transfer case oil is good with no signs of metal or discoloration.
Ford Mechanic: Ironmike, Ford Technician replied 1 year ago
does the noise change if put in 4x4 high or low?
Ask Your Own Ford Question
Ford Mechanic: Ironmike, Ford Technician replied 1 year ago
​FORD site is down. does it have a 4x4 switch?
Ask Your Own Ford Question
Customer reply replied 1 year ago
It's all wheel drive, there's no switch to change to high or low. I'm not sure about the tag containing the "L". The wife has the truck out so can't check it now. Still don't understand how a fluid change could create the issue unless your using the wrong fluid. The other Tag says to use 75/140 syn.
Ford Mechanic: Ironmike, Ford Technician replied 1 year ago
other tag will show gear ratio and L if limited slip. 200k, WOW. I would try to add one more modifier. could be the clutches. 200k is way to many miles to have never changed the fluid. I would be surprised if the pinion or carrier bearings are shot. you can disconnect the driver shaft at the rear differential and check the pinion for play. chake sure the wheels are chocked. you can see if there is excessive play up and down and how much back lash(turning the yoke back and forth) to see if there is too much wear between the pinion gear and ring gear.
Ask Your Own Ford Question
Ford Mechanic: Ironmike, Ford Technician replied 1 year ago
I do not think the wrong brand fluid would do this. either the clutches or bearings if the noise is from the rear differential
Ask Your Own Ford Question
Customer reply replied 1 year ago
There's no "L" on the gear ratio tag, only the type of fluid needed. I did not put the modifier in the first time the fluid was changed because the tag didn't identify the "L". The noise was present and ford said it was because no modifier was added. So I changed the fluid again with the modifier and had the same results. I did check the pinion and bearings, no sign of excessive wear. Don't know how to check the clutches, this is why I need help. Thanks
Ford Mechanic: Ironmike, Ford Technician replied 1 year ago
there are supposed to be 2 tags on the differential. one for fluid type and the other for gear ratio and if limited slip.clutches would be checked on turns, rear axles have to turn at different rates. That is why slip or limited slip is needed. one turns with bad clutches they chatter or if really bad no drag or slip is felt.if you have the vin number I can check if it has limited slip
Ask Your Own Ford Question
Ford Mechanic: Ironmike, Ford Technician replied 1 year ago
still waiting on the ford site, it is down now
Ask Your Own Ford Question
Ford Mechanic: Ironmike, Ford Technician replied 1 year ago
lets make sure it is limited slip
Ask Your Own Ford Question
Customer reply replied 1 year ago
Ironmike, there is 2 tags on the diff, one has some numbers, not sure if the L is on it or not, the other is the fluid type with no L. The only time the noise is heard is under excelleration and again very random. There's no noise when making turns. Can't check the vin until the wife returns later today.
Ford Mechanic: Ironmike, Ford Technician replied 1 year ago
ok. let me know the vin# ***** she gets home
Ask Your Own Ford Question
Customer reply replied 1 year ago
Ironmike, vin # *****
Ford Mechanic: Ironmike, Ford Technician replied 1 year ago
ok, you have 3.73 gear ratio. they show a long list and it is possible you have limited slip. they do not make it clear weather that is an option or you have it.if it has the tag I would try to add more modifier, in any case the bearings probably are allowing the pinion and carrier to move too much. I have seen this with vehicles with miles like you have. too much backlash.
Ask Your Own Ford Question
Ask Ironmike Your Own Question
Ironmike
Ironmike
Ironmike, Ford Technician
Category: Ford
Satisfied Customers: 3,388
3,388 Satisfied Customers
Experience: 30 years ASE Master tech L1 . Ford master

Ironmike is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

AlvinC answered a question about my Ford truck that only someone with an in-depth knowledge of his subject would have known what was going on.

Rich DUSA

Because of your expertise, you armed me with enough ammunition to win the battle with the dealer. They are installing a fuel filter and fuel pump at no charge to me.

MollyUSA

I needed help with my car on Saturday morning....got a response in 5 minutes, and it was the perfect solution. Thanks again to your service.

Jason V.Kirkland, WA

I do know, after going though this with JustAnswer, that I can somewhat trust my mechanic but I will always contact you prior to going there.

BRNew Jersey

I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry.

Stephanie PElm City, NC

used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future.

David L.Richmond, TX

9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much.

PhilMarysville, CA

< Previous | Next >

Meet the Experts:

Ron

Ron

ASE Certified Technician

24,320 satisfied customers

23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs

Chris (aka- Moose)

Chris (aka- Moose)

Technician

28,139 satisfied customers

16 years experience

John Mc

John Mc

Ford Technician

5,495 satisfied customers

19 years Ford Lincoln Mercury experience

Chuck

Chuck

ASE Certified Technician

1,685 satisfied customers

33 Years Experience,Ford Senior Master,ASE Master,L1 Advanced Engine Performance

Cam

Cam

Journeyman Automotive Technician

10 satisfied customers

GM Grand Master Technician 2007. 14 years Automotive experience.

Richard

Richard

ASE Certified Technician

1,524 satisfied customers

12 years at a Ford Lincoln/Mercury and Jaguar dealer as a technician and shop foreman.

Mike V.

Mike V.

Auto Service Technician

1,380 satisfied customers

25 years experience on all makes and models, Licensed NYS Inspector.

< Previous | Next >

Related Ford Questions
My 2000 f250 wipers and radio don't work when truck is
My 2000 f250 wipers and radio don't work when truck is running they work only when the switch is on exila … read more
A. Penland
A. Penland
Ford Senior Master Technician
Vocational, Technical or Trade School
6,690 satisfied customers
I am having a problem with my 2014 Ford Flex (Build February
I am having a problem with my 2014 Ford Flex (Build February 04, 2014). The power liftgate is inoperable, it will only open about an inch when the button is pushed from the key fob, the button in the … read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
28,139 satisfied customers
The steering on the Ford edge get hard after engine runs for
The steering on the Ford edge get hard after engine runs for a while … read more
Peter Zavarelli
Peter Zavarelli
General auto certifications
269 satisfied customers
Wrench appeared on dash. Maybe a hour and I drove maybe 20
I am on vacation and I have done nothing as far as repairs. Do not know what to do. … read more
JOHN aka Eauto
JOHN aka Eauto
self employed
High School or GED
10,348 satisfied customers
I have changed my starter, starter switch and solenoid on
I have changed my starter, starter switch and solenoid on fender. I have been looking at shat I have done already to make sure it is done properly. The question I have is on the solenoid on the fender… read more
A. Penland
A. Penland
Ford Senior Master Technician
Vocational, Technical or Trade School
6,690 satisfied customers
I have a 2002 ford escort ZX2. And I need to drop the
I have a 2002 ford escort ZX2. And I need to drop the transmission pan to change a shift solenoid A. I have the pan loose but there is a cross member in the way. So I can't drop the pan all the way do… read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
28,139 satisfied customers
1997 Lincoln town car signature series/ cigar lighter no
1997 Lincoln town car signature series/ cigar lighter no power … read more
Roy
Roy
shop foreman
Associate Degree
3,921 satisfied customers
Havefirenewfuelpumprelay,newfuelpumponframe&tank.
havefirenewfuelpumprelay,newfuelpumponframe&tank JA: What is the model/year of your Ford? Customer: 89fordf350with460motor JA: What year is your Ford? Customer: 1989 JA: Are you fixing your vehicle yo… read more
Edward Clayton
Edward Clayton
Associate Degree
1,033 satisfied customers
2013 ford fusion hybrid, can I drive the car with the
2013 ford fusion hybrid, can I drive the car with the parking brake in maintenance mode temporarily … read more
Ron
Ron
ASE Certified Technician
Vocational, Technical or Trade Scho
24,320 satisfied customers
I am having issues with a tail light not working. I have
I have checked the bulbs. they are led with in line resistors. I am curious if the resistor could have created a short to ground. … read more
Michael
Michael
Automotive Technician
High School or GED
257 satisfied customers
99 Ford ranger xlt won't turn over. No money to pay to get
Yes no money to pay to get it fixed and it won't start to take somewhere … read more
Mechanic01
Mechanic01
1,672 satisfied customers
We have no brake lights when we depress the pedal. Have
We have no brake lights when we depress the pedal. Have replaced all mini fuses, the multifunction switch, the brake switch under the pedal and still no lights when we press on the pedal. … read more
Amedee
Amedee
Automotive Consultant
Vocational, Technical or Trade Scho
18,515 satisfied customers
HAVE A 2016 FORD EXPLORER STEERING WHEEL IS COMPLETELY
HI HAVE A 2016 FORD EXPLORER STEERING WHEEL IS COMPLETELY LOCKED UP … read more
Lou P. master tech
Lou P. master tech
Mercedes Benz master tech
Bachelor\u0027s Degree
5,154 satisfied customers
2013 ford c--max radio will not stop and cannot change
2013 ford c--max radio will not stop and cannot change station or volume. … read more
Jared D
Jared D
Shop Supervisor
Bachelor\u0027s
2,002 satisfied customers
I have a ford F250... the number 30 fuse keeps blowing... It
Hi... I have a ford F250... the number 30 fuse keeps blowing... It was low on fuel but that might be unrelated … read more
Roy
Roy
shop foreman
Associate Degree
3,921 satisfied customers
It is idle high why. 3.8. Ford windstar. 2001. Air control
It is idle high why JA: How many miles are on the car? What size is the engine? Customer: 3.8 JA: What is the model/year of your Ford? Customer: Ford windstar JA: What year is your Windstar? Customer:… read more
Wayne Crawford
Wayne Crawford
3,864 satisfied customers
My retractable step will not retract it says the driver's
My retractable step will not retract it says the driver's door is not shut. it what … read more
Mat
Mat
Associate Degree
14 satisfied customers
Just replaced clutch master cylinder on 1993 bronco. Cant
Just replaced clutch master cylinder on 1993 bronco. Cant get it bled after days of effort. … read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
28,139 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x