2015 CX5 2.5 AWD Transmission took a dump

Chris_Top_Her

Banned
Moderator
Contributor
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San Antonio, Texas
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'15 CX-5 Miata AWD
Don't forget 'abusively'.
This about cars, not your domestic life. Zing! Abuse; depends on who you ask I suppose. I perform regular maintenance and drive the car within the limits of the hardware capability. I do drive for highest performance output often. But I also fly 30 year old planes that are regularly flown at maximum performance and they still run with regular maintenance, and rarely have a catastrophic failure. Many of the factory replaced transmissions posted had 3x or 4x less than mine (~86,000 miles), probably driven very conservatively... and that's just what we know from what was reported here. Being fair, can't really say if the breakdown was product of use and mileage alone, or influenced by a mechanical defect. If I take it apart maybe I can find where the problem started. Regardless, heat is the big enemy of a transmission so I'm adding a cooler to keep my temps down.
 
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2013 CX-5 Touring FWD; 2013 BMW Z4 35i
This about cars, not your domestic life. Zing! Abuse; depends on who you ask I suppose. I perform regular maintenance and drive the car within the limits of the hardware capability. I do drive for highest performance output often. But I also fly 30 year old planes that are regularly flown at maximum performance and they still run with regular maintenance, and rarely have a catastrophic failure. Many of the factory replaced transmissions posted had 3x or 4x less than mine (~86,000 miles), probably driven very conservatively... and that's just what we know from what was reported here. Being fair, can't really say if the breakdown was product of use and mileage alone, or influenced by a mechanical defect. If I take it apart maybe I can find where the problem started. Regardless, heat is the big enemy of a transmission so I'm adding a cooler to keep my temps down.
You do that; I'm sure it will help. Meanwhile, look at the bright side. You've only got the third member to go and you will have destroyed every major component in the drive train. I'm sure that must be a record of some sort!
 

GJ-Molestor

Banned
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2011 BMW 528i, 2015 Mazda 6, 1995 Nissan Maxima Manual
Don't forget 'abusively'.

Highly agree. Theres nothing wrong with operating a transmission within its physical limits if you really need to, but from day one abusing the transmission is exactly what causes it to fail in the long run.

The break in procedure is highly critical for the whole vehicle especially the engine and transmission. Failing to properly break-in your drivetrain during the early stages of your cars life increases the chances of drivetrain failure in the long term.
 
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craigo

Contributor
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2014 CX-5 GT FWD, 2015 Mazda 3 Touring
86k for a dead transmission sucks but doesn't seem too far out of the ordinary. Wonder what the bell curve looks like on MTBF
 
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2016.5 CX-5 GT AWD titanium/black 2016 Miata Club ST MT white
This about cars, not your domestic life. Zing! Abuse; depends on who you ask I suppose. I perform regular maintenance and drive the car within the limits of the hardware capability. I do drive for highest performance output often. But I also fly 30 year old planes that are regularly flown at maximum performance and they still run with regular maintenance, and rarely have a catastrophic failure. Many of the factory replaced transmissions posted had 3x or 4x less than mine (~86,000 miles), probably driven very conservatively... and that's just what we know from what was reported here. Being fair, can't really say if the breakdown was product of use and mileage alone, or influenced by a mechanical defect. If I take it apart maybe I can find where the problem started. Regardless, heat is the big enemy of a transmission so I'm adding a cooler to keep my temps down.

My understanding it that there are no external transmission lines, how will you connect the cooler?
 

Kedis82ZE8

'15 CX-5 GT AWD, '12 GX 460, '07 G35x
Contributor
:
'15 CX-5 GT AWD
He may be planning to add it in as a supplemental inline air-cooled ...plumbed into lines attached to existing "coolant" based cooler.
 

Chris_Top_Her

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San Antonio, Texas
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'15 CX-5 Miata AWD
He may be planning to add it in as a supplemental inline air-cooled ...plumbed into lines attached to existing "coolant" based cooler.

Correct. The atf cooler runs coolant and is connected to the trans
 
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2013 VRM Mazdaspeed3, 2016 Soul Red CX-5 GT
Sorry to hear about this. Hope you get it fixed soon.

I sort of remember in the past that you were driving the car with some fuses turned off? Something that allowed you to spin the rear tires to get some oversteer done? I wonder if that caused the problem with the transmission.
 

yrwei52

2016 Mazda CX-5 GT AWD w/Tech Pkg
Contributor
:
Plano, Texas, USA
Sorry to hear about this. Hope you get it fixed soon.

I sort of remember in the past that you were driving the car with some fuses turned off? Something that allowed you to spin the rear tires to get some oversteer done? I wonder if that caused the problem with the transmission.
Chris_Top_Her was talking about removing the fuse for TCS. That should have nothing to do with his failed transmission. IMO the SkyActiv-Drive transmission is a little too fragile and we need to tread it kindly.
 

Chris_Top_Her

Banned
Moderator
Contributor
:
San Antonio, Texas
:
'15 CX-5 Miata AWD
Sorry to hear about this. Hope you get it fixed soon.

I sort of remember in the past that you were driving the car with some fuses turned off? Something that allowed you to spin the rear tires to get some oversteer done? I wonder if that caused the problem with the transmission.

You can spin tires with tcs off. Removing the fuse disables the abs/wheel braking component. The differentials/axles are good, it's something internal to the trans, and probably bearing related from the initial sound it made.
 
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CX5 GT-R
Chris_Top_Her was talking about removing the fuse for TCS. That should have nothing to do with his failed transmission. IMO the SkyActiv-Drive transmission is a little too fragile and we need to tread it kindly.

I don't think it's so much fragile as a design with some flaws. It lives just fine behind 300+ torque. However, it also dies like a dog at 15K miles on a gasser. I think there is something amiss with it, but I don't really think fragility is the exact term.
 

Chris_Top_Her

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San Antonio, Texas
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'15 CX-5 Miata AWD
I'd just call it hit and miss. Mine went at 85k. Others went at 15k. Scary part is my trans came from a 2014... but it's LKQ so it should be good. Trans should be here on the 18th. I mistakingly ordered a transfer case last week.
 
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2013 CX-5 6MT
I'd just call it hit and miss. Mine went at 85k. Others went at 15k. Scary part is my trans came from a 2014... but it's LKQ so it should be good. Trans should be here on the 18th. I mistakingly ordered a transfer case last week.

are you swapping it in yourself or having a shop do it?
 

yrwei52

2016 Mazda CX-5 GT AWD w/Tech Pkg
Contributor
:
Plano, Texas, USA
I'd just call it hit and miss. Mine went at 85k. Others went at 15k. Scary part is my trans came from a 2014... but it's LKQ so it should be good. Trans should be here on the 18th. I mistakingly ordered a transfer case last week.
Yep, "hit and miss" is the best to describe the Mazda quality and reliability ⋯ ;)
 
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