458 Ferrari 458 Trans gearbox DCT sensor issues fixed & info 11/2020

My biggest question is has this issue reoccurred a second time in gearboxes that were already repaired for this issue once before?


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Hey Tarek,

My tech thought it would be the sensors, but after he sent the diagnostics to Ferrari, they simply gave me a new box! That's a $40k job!! Power warranty saved my ass!!! You have?

 

Great post and yes it is common in warmer climates. This is a know issue and to be honest I think one Ferrari should have done a recall on and fixed without cost to the owner. 9K is still a good chunk of change.

 

Great experience here to read.. thank you for sharing it

 

The issue us that not many dealers have the in-house competency to do the surgery correctly and/or sensors will fail again. I did exactly what the OP suggested the first time around. About 3K miles later, sensors failed again and I ended up getting a new replacement transmission with a two year complete warranty. Fortunately, the dealer offset me what I had already spent on the initial fix towards the new unit.

Note that the E-Diff and Transmission are ONE unit. You replace the E-diff together with the transmission...hence the ~ $30K+ cost for new OEM unit

 

YES...it can happen again. So having a good extended service warranty helps tremendously.

 

And there is a Ferrari price to pay. The AMG version of the "almost" exact same unit is $16k + installation.

 

True. The entire design is stupid. Why route so much plastic-sheathed, electrical wire through the interior of a transmission continually bathed in extremely hot oil? + ...all held together with cheap, plastic zip ties?

Understanding the transmission is a Gertrac unit, but why would Ferrari accept the design?

 

I talked with an extremely competent Ferrari independent on this topic. He told me that changes were made in 2013, going forward. Newer cars have issues, but few and far between. Again, the lack of a maintenance schedule for transmission service isn’t helping anything (I just had my trans and diff fluid changed based on years not mileage). No one replaces the DCT anymore as there are now two repair kits. It’s been this way for about 2 years, or so. Ferrari nor Getrag had a parts program or field service training program early on. Just as no one replaces the power unit on a 360, 355 0r 430 when there’s an internal problem. Repairs make more sense versus the $20K price from Ferrari. Most dealers can handle this. A few independent shops, too.

Thought I'd post this for whatever it's worth.

Rich

 

I think it would be hard to track if minor modifications inside the transmission were made at some time. Regardless, he confirmed what you said that it can be repaired and a replacement transmission isn't needed. If Ferrari/Getrag has come out with replacement parts and detailed procedures then a competent Ferrari mechanic should be able to do the repairs although I would certainly agree with you that its better to deal with someone who has previously performed the repair.

 

Hello, I wonder would u please give the Pressure sensor part no?
Is that the same as speed sensor or we need to buy it as complete unit ? thank you

 

Just to say that in some cases DCT is still being replaced


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2010 with 12,300 miles. Over the weekend I lost all gears except 1st, Reverse and Neutral. No warning lights of any kind.
It goes into the shop this week. Needless to say I am a little nervous about what this repair will cost but I wondered if
anyone has had the same experience and what was the result. Thanks.

 

As discussed could be a new gearbox, or a fix of the existing unit depending on the fault.
Some F dealerships and some indies can open the gearbox and repair, but in some circumstances a new box is required.
Typically you lose either all odd or all even gears so yours might be something simpler , hopefully.
Keep us posted.


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Thanks for the info. I really hope it is something simpler but I am not counting on it.

 

Well, I am fortunate. It turned out to be a CAN communication fault stored in the steering wheel that affected the paddles.
My mechanic cleared the faults and everything is functioning as intended.
This week has been quite an ordeal contemplating a gearbox sensor replacement.

 

I was told by a Ferrari master tech several years ago that the clips (basically big zip ties) were eventually changed to a more robust material to attempt to eliminate the degradation which caused chafing to the wiring that interferes with the speed sensor (the newer clips are a different color than the originals). The new clips are not supposed to become as brittle as the old ones due to the temperatures they face. I believe he said they also adjusted the locations of the clips within the gearbox. At the time he referred to it as an $7k job to change some $2 clips.

 

Great news, pleased for you


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Does anyone know when / what year the clips were changed to the more robust type?

 

They weren't.

 

Thanks. It’s hard to tell what is real, and what is rumor when reading about car problems on a forum. I always like to hear sources / experience when statements are made. As far as the wire clips go, if I remember correctly, it was mentioned that the clips changed color. Isn’t that enough evidence that they were changed?

 

is there any evidence that changing the DCT fluid on a regular basis will prevent degradation of the wires /zip ties? I.e., will changing the dct fluid prevent or decrease the likelihood of needing the sensor or wiring harness failure?

 

Agreed, it's across the whole spectrum / mine's a '14. Here's my box replacement w/ new, to the tune of $40k!
https://www.ferrarichat.com/forum/threads/458-tranny-issue.628502/page-2#post-147437897