How JustAnswer Works:

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

Ask Chris (aka- Moose) Your Own Question

Chris (aka- Moose)
Chris (aka- Moose), Mercury Technician
Category: Mercury
Satisfied Customers: 35078
Experience:  16 years experience with Mercury
2499435
Type Your Mercury Question Here...
Chris (aka- Moose) is online now
A new question is answered every 9 seconds

I have a 2002 Mercury Mountaineer 4.0L AWD that the casing

Customer Question

I have a 2002 Mercury Mountaineer 4.0L AWD that the casing cracked on the front differential. we replace the front differential with a used part and right after the part was put on it started making a loud clunk when turning hard left or right but not all the time, almost always when turning after backing out of a parking spot. Relpaced outside tie rod and checked the oil in the transfer case it was normal color. Did not make this noise before part was changed.
Submitted: 5 years ago.
Category: Mercury
Expert:  Chris (aka- Moose) replied 5 years ago.

Hello Customer

Thanks for coming to Just Answer to ask a question.

 

Did you just replace the differential or the complete axle assembly?

Customer: replied 5 years ago.
Just the differential
Expert:  Chris (aka- Moose) replied 5 years ago.

Either the differntial was not set up correct meaning the backlash and bearing preload is not correct.

Or all 4 tires are not the same brand and size and tread depth and the AWD is fighting itselff front to rear.

Or you need to install a S spring between the spider gears to prevent tehm from being loose in turns.

Customer: replied 5 years ago.
The tire on the front match and the rear tires match, but it did not make this noise until the part was changed, it did fight itself but never made the clunk noise. Could the part be bad or possibly not installed correctly, plus it came out of a 2002 ford explorer with 17,000 miles on it could that make a difference?
Expert:  Chris (aka- Moose) replied 5 years ago.
If you just replaced the diff and nothing else then the diff should not be a faulty part. Since it was used it sounds like you may have installed a ring gear as well. Are you sure the gear ratios are the same.
Customer: replied 5 years ago.
Yes the gear ratios are the same we checked with the dealership using the VIN, only the used front diff was installed
Expert:  Chris (aka- Moose) replied 5 years ago.
Then you need the S spring or recheck the ring gear backlash. This is assuming there is not another concern not even connected to the front axle where as the transfer case viscous coupling has failed and is grabbing to much.
Customer: replied 5 years ago.
What would it do if the used part dealer gave me the wrong gear ratio, and how would you check the ring gear backlash?
Expert:  Chris (aka- Moose) replied 5 years ago.

You check backlash witha dial indicator.

If you have the wrong gear aratio then hte front and rear axles are not turning teh same speed and this will cause numerous part fialures i nthe driveline.

Customer: replied 5 years ago.
so if gear ratio was off it would do more than an occasional clunk right?
Expert:  Chris (aka- Moose) replied 5 years ago.
The clunk it will and can do. It will overtime cause axle wear front and rear and driveshaft wear and transfer case wear.
Customer: replied 5 years ago.

the dealership told us our gear ratio was 355 how can I find out what the gear ratio is on the front differential we installed. Where is the tag and what should it say to be a 355.

Expert:  Chris (aka- Moose) replied 5 years ago.
There should be a stamped number on the end of the pinion and on the back of the ring gear. You count the teeth on both to get the ratio. 1 pinion tooth equals 3.55 ring gear teeth.
Chris (aka- Moose), Mercury Technician
Category: Mercury
Satisfied Customers: 35078
Experience: 16 years experience with Mercury
Chris (aka- Moose) and 4 other Mercury Specialists are ready to help you
Customer: replied 5 years ago.

We are pretty sure we got the right ratio but we will check that and the s spring and the rear ring backlash. Thanks for all your help! It's been driving us nuts!

Expert:  Chris (aka- Moose) replied 5 years ago.
You are welcome

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 D USA
< Last | Next >
  • 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 D USA
  • 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. Molly USA
  • 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. BR New Jersey
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex Los Angeles, CA
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP Hesperia, CA
 
 
 

Meet The Experts:

 
 
 
  • Ron

    ASE Certified Technician

    Satisfied Customers:

    1601
    ASE Certs and Ford Certs
< Last | Next >
  • http://ww2.justanswer.com/uploads/FO/fordguy4u/2011-12-17_222940_HPIM1257.64x64.JPG Ron's Avatar

    Ron

    ASE Certified Technician

    Satisfied Customers:

    1601
    ASE Certs and Ford Certs
  • http://ww2.justanswer.com/uploads/MU/muddyford/2012-6-13_1204_1.64x64.png Chris (aka- Moose)'s Avatar

    Chris (aka- Moose)

    Mercury Technician

    Satisfied Customers:

    1399
    16 years experience with Mercury
  • http://ww2.justanswer.com/uploads/JM/jmcdo28/2012-2-23_01655_resized.64x64.jpg John Mc's Avatar

    John Mc

    Mercury Technician

    Satisfied Customers:

    403
    19 years Ford Lincoln Mercury experience
  • http://ww2.justanswer.com/uploads/wmarti7/2009-4-18_04332_Avatar.jpg Chuck's Avatar

    Chuck

    ASE Certified Technician

    Satisfied Customers:

    287
    33 Years experience,Ford Senior Master,ASE Master,L1 Advanced Engine Performance
  • http://ww2.justanswer.com/uploads/scottz136/2008-12-09_220350_js640_p1010013.jpg scottz136's Avatar

    scottz136

    Mercury Technician

    Satisfied Customers:

    260
    senior master lincoln mercury tech.
  • http://ww2.justanswer.com/uploads/TI/tim37857/2011-10-28_23053_S6301814.64x64.JPG Tim's Auto Repair's Avatar

    Tim's Auto Repair

    mechanic

    Satisfied Customers:

    257
    Have owned a repair shop for 25 yrs.
  • http://ww2.justanswer.com/uploads/DR/drivefast1971/2012-1-12_172422_0009051tQKh.64x64.jpg Ron Z.'s Avatar

    Ron Z.

    - Mercury Tech -

    Satisfied Customers:

    197
    18+yrs experience. State Inspector and Mercury Diagnostics
 
 
 

Related Mercury Questions

Chat Now With A Mercury Mechanic
Chris (aka- Moose)
Chris (aka- Moose)
1639 Satisfied Customers
16 years experience with Mercury