CX-5 Cracked Diff?
- Thread starter KennethPR
- Start date
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- 2016.5 CX-5 GT AWD titanium/black 2016 Miata Club ST MT white
Ouch! I believe that's the first time that we've seen this on the forum. Have you had the CX since new? Any idea what caused this?
I suppose that it could be welded, I'm no expert on welding but I'm sure that one will come along shortly.
I suppose that it could be welded, I'm no expert on welding but I'm sure that one will come along shortly.
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- Mazda CX-9 Signature
I don't think speed bump will break the mount. Maybe from jacking at the diff? I also don't think welding will be a good solution as you can only weld the outer parameter. I'm no welder so I could be wrong.
Well it is very clean underneath for a 2013! But yeah warranty and TSB are not really applicable then.
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- 2016.5 CX-5 GT AWD titanium/black 2016 Miata Club ST MT white
That's what I would like to know too. 90mph over a speed bump? How did you manage to not crash? If I had hit any of the speed bumps in my area at that speed, I would have gone airborne and most likely wouldn't be typing this. We have a few 'speed tables' in the area and if you hit one of those at that speed? Forgetaboutit.
HyFlyer
2019 CX5 sig 2.2 diesel / 2016.5 CX5 touring 2.5na
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- Southwest Ohio
Also, the car is 11 years old. Is there anything bad happening because of the cracked piece? What does it attach to? 
Maybe just roll with it and see how it goes?
I can't tell from your picture the orientation and what that broken nub goes to. That's looks like a substantial size bolt. Is this the rear differential? Maybe a picture showing more of the area?
Maybe just roll with it and see how it goes? I can't tell from your picture the orientation and what that broken nub goes to. That's looks like a substantial size bolt. Is this the rear differential? Maybe a picture showing more of the area?
If you find a skilled welder you could have it welded, there is just no guarantee that it will hold. The weld can only go so deep, and this is a pretty thick piece. But a weld would be better than no weld at all, and if the weld doesn’t hold you would be back to where you are, with a cracked diff, but it wouldn’t be worst.
You probably won’t be able to get a good weld all around the part without removing it. If it was me and I would be going to the trouble of finding a good welder and removing the part, i would probably just replace it at that point. That may be cheaper or about the same price. Maybe with a junkyard or a reconditioned part.
You probably won’t be able to get a good weld all around the part without removing it. If it was me and I would be going to the trouble of finding a good welder and removing the part, i would probably just replace it at that point. That may be cheaper or about the same price. Maybe with a junkyard or a reconditioned part.
Ok so quick update, I talked to the previous owner, he said he knew about the broken rear diff but forgot to mention it 
Anyhow, he told me he was told he could use the car like that as that is one out of four mounting posts on the diff.
I will have it welded back in place, if it doesnt hold I will need to replace the whole differential as its the housing itself which is one whole piece.
Thanks for the input you guys.
Anyhow, he told me he was told he could use the car like that as that is one out of four mounting posts on the diff.
I will have it welded back in place, if it doesnt hold I will need to replace the whole differential as its the housing itself which is one whole piece.
Thanks for the input you guys.
Since it is aluminum (I think) you would need to have someone TIG weld it.
Back in the day when they used to call it Heliarc welding my father had some done on a jet river sled and it has held up well for decades on high stress points.
Good reference video if one ever does need to swap rear diff
www.youtube.com
So we are basically looking at it being cracked here:
Back in the day when they used to call it Heliarc welding my father had some done on a jet river sled and it has held up well for decades on high stress points.
Good reference video if one ever does need to swap rear diff
* Rear Differential Replacement - DIY/How to - Mazda CX5
*** ******* ********* ********** ******* ** ** - *******!Hi guys, in this video I want to share my experience how to replace rear differential on pre-facelif...
www.youtube.com
So we are basically looking at it being cracked here:
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Hard to believe some one could forget a repair that expensive.... I'd go with the weld, what have you got to lose? It's not like it's leaking or anything. Is there any chance an accident caused that?Ok so quick update, I talked to the previous owner, he said he knew about the broken rear diff but forgot to mention it
Anyhow, he told me he was told he could use the car like that as that is one out of four mounting posts on the diff.
I will have it welded back in place, if it doesnt hold I will need to replace the whole differential as its the housing itself which is one whole piece.
Thanks for the input you guys.
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- ‘19 CX-5 GTR Tu
If it was me, I would not trust the weld, considering you can get a remanufactured new/junkyard. It should cost a little mores then the weld job but piece of mind is worth a little extra $$$. At least you’ll have a peace of mind, knowing that the weld will not be the cause of failure in the future.
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- ‘19 CX-5 GTR Tu
Found the part in question on eBay:
https://www.ebay.com (commissions earned)
DONOR VEHICLE : 2023 MAZDA CX-9 TOURING 2.5L 5K MILES . IMPORTANT FOR US. Item may show signs of normal wear, light scratches or other imperfections as a result of this being a used part. All the parts are tested either before or after removal from the vehicle.
www.ebay.com
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- ‘19 CX-5 GTR Tu
https://www.ebay.com (commissions earned)
****IMPORTANT**** <br>Click HERE to see full part description and important part fitment information.
www.ebay.com
https://www.ebay.com (commissions earned)
Condition: 1k. MAZDA CX5 17-23. MAZDA CX9 18-23. Model: MAZDA CX5. Transfer Case.
www.ebay.com
Found a bunch of these parts, fringing from low $400-$600 not installed and most by come with the 30 day warranty.
Be sure to check out eBay and car car-parts.com
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