CVT Failure-Here's A Thought.......
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Neutral
Joined: Oct 2017
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CVT Failure-Here's A Thought.......
I read all over the net about the CVT trans failing at very low mileage and very high mileage and everywhere in between. But, I haven't found any reason why the CVT belt fails except people thinking that the design is a bad one.
I also have read all over the net about how the CVT looses its adaptations periodically and need to be "relearned" by the operator preforming a long involved procedure of moving the shifter back and forth etc.
Here is a thought.......could the CVT brain losing its adaptations cause the CVT to malfunction and cause unnecessary strain on the belt and cause it to break?
What do you all think?
I also have read all over the net about how the CVT looses its adaptations periodically and need to be "relearned" by the operator preforming a long involved procedure of moving the shifter back and forth etc.
Here is a thought.......could the CVT brain losing its adaptations cause the CVT to malfunction and cause unnecessary strain on the belt and cause it to break?
What do you all think?
I think the CVT failures are caused by all sorts of issues. Although simple in theory, there are lot of internals that can go wrong.
Keep this in mind too - a lot of the modest JCW performance upgrades you can do on a base Cooper specifically say for the manual transmission only. In other words, the CVT seems to be at it's limit of stress at the stock power levels.
Lack of proper training for diagnosing problems is another issue. I've run across one thread here where all that was needed as a sensor. The dealer or even a reputable transmission aren't trained to diagnose these CVTs though, so they just say the whole thing has to be replaced.
2nd Gear
Joined: Apr 2017
Posts: 92
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There is conflicting info. about what MINI spec'ed for fluid changes. I believe a CVT fluid change was supposed to be part of the inspection I or II, but was not always performed. The manufacturer of the CVT spec'ed the fluid change to be done every 45,000 km.
I think the CVT failures are caused by all sorts of issues. Although simple in theory, there are lot of internals that can go wrong.
Keep this in mind too - a lot of the modest JCW performance upgrades you can do on a base Cooper specifically say for the manual transmission only. In other words, the CVT seems to be at it's limit of stress at the stock power levels.
Lack of proper training for diagnosing problems is another issue. I've run across one thread here where all that was needed as a sensor. The dealer or even a reputable transmission aren't trained to diagnose these CVTs though, so they just say the whole thing has to be replaced.
I think the CVT failures are caused by all sorts of issues. Although simple in theory, there are lot of internals that can go wrong.
Keep this in mind too - a lot of the modest JCW performance upgrades you can do on a base Cooper specifically say for the manual transmission only. In other words, the CVT seems to be at it's limit of stress at the stock power levels.
Lack of proper training for diagnosing problems is another issue. I've run across one thread here where all that was needed as a sensor. The dealer or even a reputable transmission aren't trained to diagnose these CVTs though, so they just say the whole thing has to be replaced.
6th Gear
Joined: May 2007
Posts: 1,305
Likes: 117
From: Gulf Coast FL
Jesus. Why are they even making transmissions that weak?
I agree - it's pretty crazy. I guess the restriction was mainly on the R50 tuning kit, which adds only about 11HP and some increased torque: https://minicooper.fandom.com/wiki/1...JCW_Tuning_Kit
You can see it's the first line in the "important information" in the install instructions...ha!
You can see it's the first line in the "important information" in the install instructions...ha!
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