458 Gearbox DCT Failure

Because, according to the video, the seals and bearings have a finite lifetime of miles and years
A 9 year old transmission with sensor failings also will have concurrent issues with the seals and bearings and other items

 

seals do get changed when changing sensors, i'd say mechanics who work on challenge cars should know what they are talking about ..none i've consulted with said you'd need to rebuild the trans mechanically if just sensors are bad. Of course if there are metal shavings or any other evidence of mechanical failure you would have to

 

Todd, we have owners here with 100Kmiles and having no problems with the DCT at all.

Why exchanging the bearings etc ... technically there is no need imo. Just to be sure ? What if the e-diff then goes ?

 

Can someone be so kind as to show me someone with 100k miles, and still on the original transmission? Sorry, I need to see that, to believe that.
TIA

 

There is one here .... with KMiles 136 !

 

there are several on this board

 

https://www.ferrarichat.com/forum/threads/458-just-reached-100-000-miles-in-washington-state-with-a-celebration-party.637777/

 

Hard to believe?? And why should that be? The 458 transmission is super reliable in terms of mechanics and in fact I am struggling to think of any mechanical issues with Ferrari transmissions in the last 10-15 years. Electronics in them obviously can fail and they can be replaced, but mechanical problems... don't think so.

 

Thanks for following up on this.... hope for a not too expensive outcome for you. There is a guy in Hollywood that is an expert on DCT Getrag transmissions by the way. He also has an informative YouTube channel and has posted a few videos on this transmission. I posted a few in this forum but he is Hollywood Mechanic on YouTube. Luckily he is not far from you...unlike me here in Tampa Florida.

 

I wonder if periodic fluid changes and sending the oil out for analysis would give an early warning of a a problem?

 

Even if it did, I suspect most of the cost here is labor, so fixing it early would have few benefits.

My mechanic always has a DCT or five on a bench for repair. But he still estimates it is 15% or less that have an issue.

 

When they change the DCT fluids your technician *should* be able to tell if the fluids are intermixed, thus indicating seal failure. You could also send the fluid out for analysis.

 

There seems to be three DCT failure modes - sensor, seals, and mechanical. The sensor failure mode is the most common and is usually what folks refer to when they say “DCT failure.” The seals failure mode has been discovered as repair shop crack open the DCT to fix the sensors. Then we have the mechanical failure mode involving bearings or gears or synchros, etc.

Does this sound right?

A true mechanical failure sounds shockingly rare. Sensor failures are rare but happen. For me the interesting question is if you are in the shop for a sensor repair and have the crack the DCT open anyway, should you also do the seals while you are in there?

 

If I am opening up mine, I would certainly have a thorough inspection of what can be inspected and if there is any question some new parts are in order, of course do them. Its like a heart surgeon that opens up the chest cavity, when he's in there he may see something that needs correcting so same difference, you do that too. I'm still of the opinion that with normal use, these tranny's have a long life and I do not worry about failure that may not occur.

 

If you are already with the transmission on the bench, replace whatever can fail in the future: seals, bearings and speed sensor; otherwise you can solve your problem and short while after putting transmission back on the cradle, getting another error and you’d prefer to die..


Enviado desde mi iPhone utilizando FerrariChat

 

According to the Hollywood Mechanic's information YT vid, it's about $20k to do everything that can be replaced, and about $7-9k to do just the minimum if it's a speed sensor, so why not do everything WYIT and have that piece of mind?

 

I currently own and maintain a 360. Thought I was interested in a 458 until I read this thread and what’s on the net . Sounds like a DTC roll of the dice for a buyer . Think I’m out .

 

Or tell me my fears are exaggerated?

 

It all depends on you. If you are going to lose sleep over this, don't by the car. Same way someone who would fret spending 42k on tires shouldn't buy a Veyron.

I hate paying a fee to buy tickets online for movies, so I buy them in person. But the idea that that my 458 might need transmission work means nothing to me. To each their own.

 

Fear, that's the other guy's problem. I own a SpecialeA and the least of my concerns is a trans issue. Absolutely love shifting that bad boy around 9000 RPM . I expect this transmission to work properly for a very long time.

 

?

 

Ok, boomer