CX-5 Rear differential whining
- Thread starter Ryan0728
- Start date
Have you changed the fluid in rear diff to check for any water contamination?
mazdas247.com
Another TSB to look at
2013~2016 - CX-5 Rear Diff and Transfer Case Fluid Change: Tools, Parts and Links
Part showed up for rear diff water intrusion issue I posted in a few back here https://mazdas247.com/forum/t/rear-diff-and-transfer-case-fluid-change-tools-parts-and-links.123850370/post-6743712 Sorry... terrible pics... probably won't get to this until January though. Not sure if everyone...
Another TSB to look at
is there any way i could save it? how much time do i have until the diff fails, do i need a new breather tube?
I am not aware of anyone rebuilding these at home.
Sorry.. I don’t know on how long it will last.
Have you drained and refilled the fluid out of the rear diff yet?
I would install the revised breather tube but that will just prevent further damage if water gets into that spot in the future.
Sorry.. I don’t know on how long it will last.
Have you drained and refilled the fluid out of the rear diff yet?
I would install the revised breather tube but that will just prevent further damage if water gets into that spot in the future.
Where can i buy the revised tube? No i have done the fluid of the diff yet, most def gonna do that
Ur a life saver, cant seem to find the rear diff fluid, anything u suggest?
Fluid preferences are debatable and borderline on politics & religion 
……but I use Amsoil in a lot of my applications. This is what I have been using in my CX-5. ‘16+ they started recommending some expensive Mazda fluid for models going forward. Any one of these I would fine using in mine…others will have their own recommendations
……but I use Amsoil in a lot of my applications. This is what I have been using in my CX-5. ‘16+ they started recommending some expensive Mazda fluid for models going forward. Any one of these I would fine using in mine…others will have their own recommendations
- :
- Plano, Texas, USA
What MY of your CX-5 and how many miles on it? Have you driven through flooding water recently?
He has a ‘14… it could have been from a car wash as well.. unless I lived in a desert and only ever hand washed vehicle I’d strongly encourage 13-16.5 owners to retrofit with the TSB parts
mazdas247.com
2013~2016 - CX-5 Rear Diff and Transfer Case Fluid Change: Tools, Parts and Links
I would ask what the viscosity will tell you or what path of research you are headed down? Andnope, no one on the internet's most busy oil forum have not chimed in. https://www.bobistheoilguy.com/forums/threads/mazda-long-life-hypoid-gear-oil-sg1.291007/post-4784389 And I would caution of...
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- Plano, Texas, USA
The OP should have seen “4WD” malfunction warning light when his rear differential is having water in there?
Here’re 2 related TSBs for rear differential input bearing failure on CX-5:
TSB 03-002/14: Rattle / Chatter Noise from Rear Differential
TSB No.: 03-001/16 Rattle / Chatter Noise from Rear Differential
It may depend on how much water got down there.
It very well could be the TSB you mentioned above as well as the water intrusion is a red herring
It very well could be the TSB you mentioned above as well as the water intrusion is a red herring
- :
- Plano, Texas, USA
Mazda has modified the rear differential front housing to eliminate cause of the noise due to bearing failure since Oct. 2015. @Chris_Top_Her had his 2015 rear differential replaced with a used 2016 CX-5 on purpose as it has revised housing:
What have you done to your CX-5 today?
New diff came in, off aearly build 2016 and the casted model no. is the revised version.
Unfortunately I seem to hear some whining noise from either rear wheel bearing or rear differential input bearing recently. My 2016 CX-5 GT AWD has only 53K miles and was assembled in Jan. 2015, hence the differential hasn’t been revised on front housing and the potential bearing problem on my rear differential is there.
And it’s funny that he paid $430 shipped for a used rear differential just 4.5 years ago in Dec. 2019, now it’s $1,250???
And a TCM reprogramming is required with rear differential replacement:
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How many quick packs will i need, just one?Fluid preferences are debatable and borderline on politics & religion
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- Plano, Texas, USA
The manual says the gear lube capacity at front transfer case is 0.45 quart. The rear differential is 0.45 / 0.37 quarts on gen-1 / gen-2 CX-5 respectively.
Unfortunately in actuality the rear differential requires ~0.75 quart to reach the fill hole. So you need to get 2 quarts / bottles for both.
