[e92bmw]

.

[JayKay335i]

Given the thousands of tuned cars and tuner markets for 335s, I'd ass assume its fine.

[Turkeybaster115]

Originally Posted by beemw

Hi guys after reading many posts on ZF rating the 335i's transmission at a maximum of 450nm of torque (331.9ft/lbs) I am getting kind of worried to put a tune on my car. Yes I know this subject has been discussed before but there all a couple of years old and now that many people have tuned their automatic 335i's I was wondering has anyone ever had a problem? I know that terry's car is a step 135i and hes running crazy amounts of torque. So my question to you is do you guys think a tune( jb3, procede or jb+) would damage my tansmission? Since it would run much more torque than zf rated it maximum capacity.

Any tune will shorten the lifespan of your auto tranny, HPFP, and turbos. By how much, is difficult to determine.

[MusclezMarinara]

if its a 6MT make sure you have the CDV delete and you know the proper way to drive.

If you warm up the vehicle to operating temp it will have no effect on doing damage..so in short yes the trans can handle the extra power.

[e92bmw]

Sorry I forgot to specify that I have an automatic 07 335i. I wantes to know if anyone has ever had transmission failures on their step 335i/135i/535i

[MusclezMarinara]

non to my knowledge the e46s had trans issues...the e9x transmissions are better built

[e92bmw]

Ya I hope thats true, maybe bmw told zf to say that to prevent people from tuning their cars.

[zerep1]

Originally Posted by beemw

Ya I hope thats true, maybe bmw told zf to say that to prevent people from tuning their cars.

the torque converter is good to that point but if you read the thread it lock up with the gear after a certain point

[e92bmw]

Originally Posted by zerep1

the torque converter is good to that point but if you read the thread it lock up with the gear after a certain point

Im sorry i really have no clue what that meant.

[Wingman335]

Originally Posted by beemw

Im sorry i really have no clue what that meant.

I think what he meant to say was that after the vehicle reaches a certain speed, the torque converter in the transmission box locks up- thereby reducing the amount of energy wasted to spin the torque converter.

[e92bmw]

Oh ok, well have any of you had any transmission problem with nothing but a tune because I saw this video and he apparently only had a tune...

I know I'm probably getting a bit too worried but I really wouldnt want to spend 8k for a new transmission. But when I think of it Dinan keeps the stock tranny and they run 430ft lbs and they warranty it so it must be very strong, So i dont know why they rated it at 332ft lbs when most 335i's make that much in stock form at the crank....

[cn555ic]

Originally Posted by beemw

Oh ok, well have any of you had any transmission problem with nothing but a tune because I saw this video and he apparently only had a tune...

I know I'm probably getting a bit too worried but I really wouldnt want to spend 8k for a new transmission. But when I think of it Dinan keeps the stock tranny and they run 430ft lbs and they warranty it so it must be very strong, So i dont know why they rated it at 332ft lbs when most 335i's make that much in stock form at the crank....

Guy was on nitrous I think from that video

[e92bmw]

Originally Posted by cn555ic

Guy was on nitrous I think from that video

Hi I just got this car but before I did I spent a good year and a half reading things on the forum and Ive seen u post on alot of threads(I remember ur beautifull e93) So since I know that youve been around a long time, let me ask you have you ever had any problems with your transmission? and are you auto or manual?

[M340i Pride]

Originally Posted by MusclezMarinara

non to my knowledge the e46s had trans issues...the e9x transmissions are better built

E90 ZF auto is indeed far advanced from auto from E46 platform. to me, it makes the car as quick as manual (most other auto tranny car cannot do this) or in a way, quicker.

[Thud]

Everything is engineered with some "headroom" so a fractional increase in torque shouldn't be a problem.

However, it means you might run into a transmission problem in 100k miles instead of 130k miles, or something to that effect. Really no way to predict.

[cn555ic]

Originally Posted by beemw

Hi I just got this car but before I did I spent a good year and a half reading things on the forum and Ive seen u post on alot of threads(I remember ur beautifull e93) So since I know that youve been around a long time, let me ask you have you ever had any problems with your transmission? and are you auto or manual?

I am auto and have every single bolt on possibly with meth...Granted I have very few miles on my car as it is only a spring, summer car and not daily driver, but I boost up to 17 psi regularly with meth, and so far so good....Also I haven't heard too many issues with the auto trans from these forums in over 4 years...Yes there are only possibly a handful that had problems but thats comparing to thousands that don't! Just dont push the car to its LIMITS when you get a tune...

[Imperator]

Originally Posted by beemw

Oh ok, well have any of you had any transmission problem with nothing but a tune because I saw this video and he apparently only had a tune...

Good Lord what a mess. How obtuse could that driver be? The transmission was slipping badly through the upshifts yet he stayed in it through fourth.

[Brian135i]

Originally Posted by Imperator

Good Lord what a mess. How obtuse could that driver be? The transmission was slipping badly through the upshifts yet he stayed in it through fourth.

Lol...

[Imperator]

Here's another ugly video from the same uploader/car/transmission

[enrita]

so far so good at 45K . pushing quite a lot of torque on upped turbos. Replaced oil and oil pan recently and there was a lot of metal shavings on the 2 magnets and the oil was pretty messed up. Thank god for the locking of the converter.
So far nobody has broken the transmission because of the added power so seems this ZF are very sturdy.

[Turkeybaster115]

Seeing as how so many people listen to the dealerships, and under maintain their transmissions, i.e, never change the fluid, if you use a tune, you would probably benefit from increased service intervals, i.e, drain and fill fluid every 15,000 miles, instead of every 30,000 miles.

[BobS]

I remember reading somewhere on this board the 6MT in the current 335 was from the older e39 m5 (400hp). I'm not sure if this is true or not. I can't find the thread I read that in.

I think the Trans is fine, like many said already, there are many 335's that are tuned and don't have a issue. There are also many that are being raced with tunes that have no issues so far and don't have upgraded trans to my knowledge.