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Old 10-04-2005, 04:37 AM   #1
Oshin02
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Auto Trans. Limit

I've heard a lot of draw backs that the step/auto equipped e46's have with major power upgrades. For example, there is no stage 2 SC kit for them due to the tranny not being able to withstand all that extra power......What is it really that can't withstand the power in the trans.? Is it the gears, the torque converter, etc.. Also, is there a way to correct this weakness in step/auto transmissions without swaping on over to a manual? Thanks!
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Old 10-04-2005, 04:39 AM   #2
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And yes, Im unfortunately a step/auto.
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Old 10-04-2005, 11:17 AM   #3
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And yes, Im unfortunately a step/auto.
Why is it being unfortunate? I have so much fun at the tracks with an ASA SC and a steptronic.
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Old 10-04-2005, 08:56 PM   #4
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Well i had a turbo setup on my e46 and the tranny would always go into limp mode at around 3,500rpm when it was reaching max power levels. There is a limit on the tranny but i think its more got to do with the brain controlling it. There must be a certain power (torque) level that the computer has been pre set to before putting the trans into limp mode.
As soon as i took the turbo set up off and left it n/a with exhaust and air intake mods there car and tranny ran perfect... i dont think just "BEEFING UP" the tranny is going to help... Something needs to be done to the computer.

im no expert but thats just comming from experience..

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Old 10-05-2005, 03:38 AM   #5
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Originally Posted by BMR2NV
Well i had a turbo setup on my e46 and the tranny would always go into limp mode at around 3,500rpm when it was reaching max power levels. There is a limit on the tranny but i think its more got to do with the brain controlling it. There must be a certain power (torque) level that the computer has been pre set to before putting the trans into limp mode.
As soon as i took the turbo set up off and left it n/a with exhaust and air intake mods there car and tranny ran perfect... i dont think just "BEEFING UP" the tranny is going to help... Something needs to be done to the computer.

im no expert but thats just comming from experience..
Is there any trans softwares that can do this?....
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Old 10-05-2005, 12:46 PM   #6
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Originally Posted by Oshin02
Is there any trans softwares that can do this?....
I've heard Dinan.
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Old 10-06-2005, 06:23 PM   #7
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Originally Posted by BMR2NV
Well i had a turbo setup on my e46 and the tranny would always go into limp mode at around 3,500rpm when it was reaching max power levels. There is a limit on the tranny but i think its more got to do with the brain controlling it. There must be a certain power (torque) level that the computer has been pre set to before putting the trans into limp mode.
As soon as i took the turbo set up off and left it n/a with exhaust and air intake mods there car and tranny ran perfect... i dont think just "BEEFING UP" the tranny is going to help... Something needs to be done to the computer.

im no expert but thats just comming from experience..
I know there's been lots of debate in this forum on auto transmissions and I'm not looking to re-create that. It would be interesting to know though what the torque sensor limits are on the GM and ZF transmissions.
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Old 10-14-2005, 07:03 PM   #8
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Quote:
Originally Posted by Oshin02
I've heard a lot of draw backs that the step/auto equipped e46's have with major power upgrades. For example, there is no stage 2 SC kit for them due to the tranny not being able to withstand all that extra power......What is it really that can't withstand the power in the trans.? Is it the gears, the torque converter, etc.. Also, is there a way to correct this weakness in step/auto transmissions without swaping on over to a manual? Thanks!
i had level 10 tranny work done and a 330ci with sk+ and my tranny went also i would say level ten is huge waste of money
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Old 10-20-2005, 07:56 PM   #9
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[QUOTE=fstazzwhip]i had level 10 tranny work done and a 330ci with sk+ and my tranny went also i would say level ten is huge waste of money[/QUO

So what did you end up doing, and what do you got now? Any more problems?
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Old 02-02-2006, 02:28 AM   #10
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BUMP!!

this is one topic that apparently no one has a definite answer on..and it is a major concern for all step users.this is the only thing keeping me from my SK1..damn.

i'm so close to getting SC'd but this 'small' obstacle is in the way..

my ZF is rated at 325Nm..i've got 280Nm stock.i'm only allowed a measly 45Nms??? that's abysmal!!
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Old 02-02-2006, 02:44 AM   #11
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Originally Posted by supergripen
BUMP!!

this is one topic that apparently no one has a definite answer on..and it is a major concern for all step users.this is the only thing keeping me from my SK1..damn.

i'm so close to getting SC'd but this 'small' obstacle is in the way..

my ZF is rated at 325Nm..i've got 280Nm stock.i'm only allowed a measly 45Nms??? that's abysmal!!
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Old 02-03-2006, 01:33 AM   #12
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your 328 should be fine with the sk1 kit. I have a step 330 and I'm running the Sk+ kit. For the 330, you can either run the sk+ or run the sk1 with a 5.5psi pulley.

Shinobi is currently running the sk1 6.5psi kit on his step 330 and I think he is still running strong. He tracks his car so we shall see how well his tranny holds up. When I was at Technik, I believe i saw his car dyno high 260, maybe 270 to the wheels. I might be wrong.
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Old 10-14-2005, 08:45 PM   #13
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Originally Posted by Oshin02
I've heard a lot of draw backs that the step/auto equipped e46's have with major power upgrades. For example, there is no stage 2 SC kit for them due to the tranny not being able to withstand all that extra power......What is it really that can't withstand the power in the trans.? Is it the gears, the torque converter, etc.. Also, is there a way to correct this weakness in step/auto transmissions without swaping on over to a manual? Thanks!
Hi, I think if you want to go for stage II, you can do it!! I`d heard you must modify your autotranny by changing more larger torque converter and hydrosystem valve(??). In addition, the auto tranny controlling chip should be also upgraded. However, I think there`s additional problem, which is your engine. I am not sure whether those higher boost will be okay. I mean you need to change piston to a forged one, if you wanna go more than 350-400HP. I even don`t know when forged piston is needed in terms of horsepower. 350-400HP is just my guess from my research.

By the way, I`d heard it`s only matter of chip, when you upgrade power of your auto tranny car. That is to say, if tranny chip is well modulated, I`d heard there will be no problem without modifying your actual part of auto tranny.


In my opinion, it`s wierd why auto tranny is not recommended for supercharger kits. Don`t you think there will be less risk as gear is automatically changed? NX express guy says auto tranny is the right one for NX kit. Then, why supercharger or turbocharger not?

Let me know anything you know about this issue, because myself also had been looking for the way to upgrade my autotranny for more than six months. I don`t want to have manual, and I just want to have 350HP or better torque than stock E46 M3 with less than 8K. My car is 2003 BMW 325xi auto tranny.
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Old 10-14-2005, 09:00 PM   #14
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Quote:
Originally Posted by Kwanghyun Chi
Hi, I think if you want to go for stage II, you can do it!! I`d heard you must modify your autotranny by changing more larger torque converter and hydrosystem valve(??). In addition, the auto tranny controlling chip should be also upgraded. However, I think there`s additional problem, which is your engine. I am not sure whether those higher boost will be okay. I mean you need to change piston to a forged one, if you wanna go more than 350-400HP. I even don`t know when forged piston is needed in terms of horsepower. 350-400HP is just my guess from my research.

By the way, I`d heard it`s only matter of chip, when you upgrade power of your auto tranny car. That is to say, if tranny chip is well modulated, I`d heard there will be no problem without modifying your actual part of auto tranny.


In my opinion, it`s wierd why auto tranny is not recommended for supercharger kits. Don`t you think there will be less risk as gear is automatically changed? NX express guy says auto tranny is the right one for NX kit. Then, why supercharger or turbocharger not?

Let me know anything you know about this issue, because myself also had been looking for the way to upgrade my autotranny for more than six months. I don`t want to have manual, and I just want to have 350HP or better torque than stock E46 M3 with less than 8K. My car is 2003 BMW 325xi auto tranny.
i had all of the above done and my tranny broke do not go crazy on an auto unless u have a few grand for a new tranny even if you "beef" up the tranny it will still suck
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Old 10-15-2005, 02:21 AM   #15
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level ten is f***in garbage.... i had a level 3 installed on my car and my tranny was still giving me problems.... the car is just sitting in my driveway and i just got a brand new Mustang... thank god those cars don't have the kind of transmission problems the bimmers do with boosting but.... i miss the handling in the bimmer ...
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Old 10-15-2005, 03:56 AM   #16
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Wow, I never thought are step/auto's will be this much of a hassle...........Wait, If our Trans.'s are maid from GM. How can does domestics run high hp without a trans swap? is there an auto swap that we can do using another auto trans. from GM which is "beefier"?
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Old 10-15-2005, 10:33 AM   #17
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2 questins
first i thought the problem with the level ten tranny was simply software
secondly if you 2 that stated above that it broke did you guys ever return it and get your money back or anyhting???
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Old 02-27-2006, 05:46 PM   #18
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Old 03-06-2006, 09:31 PM   #19
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Old 03-09-2006, 03:45 PM   #20
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for the ones who have the "level 10" upgrade. Did you swap out the torque converter as well?.....I don't understand why the level 10 upgrade failed to support the power. I know about 2 Audi guys that have done the upgrade themselfs on there auto transmissions and it works beutifuly. Also, to top it all off. The B5 audi A4 auto trans. is really weak to begin with. Somethigns not right........who installed the kit for you guys by the way?
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