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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Thu, Jun-28-2012, 04:14:44 AM   #1
Steezy
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Default Is this healthy for an M3 (SMG)

I've been wanting to get this answer for a while, just never got the time...

Let's say I'm on the highway, on 6th gear with an M3 E46 (SMG), would it hurt the transmission if I downshift all the way to 3rd gear (pushing the left paddle 3 times quickly), then gunning it? Also, do I have to take my foot of the pedal while downshifting/upshifting?

Thanks for the feedback; just wanted to clear this up;.
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Old Thu, Jun-28-2012, 04:24:26 AM   #2
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Default Re: Is this healthy for an M3 (SMG)

a good habbit of mine is to release the pedal when i shift. computers are computers, it's good to ease off the pedal when shifting. I also see no harm shifting 6 to 3 and gunning it... i do it all the time hahah and it's fun. at 119k miles, still original clutch, smg tranny, and pump.
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Old Thu, Jun-28-2012, 04:35:37 AM   #3
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Default Re: Is this healthy for an M3 (SMG)

you do not need to lift. The computer will cut the gas and spark etc. Plus it will also stop you from over revving if the shift is unsafe
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Old Thu, Jun-28-2012, 05:15:08 AM   #4
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Default Re: Is this healthy for an M3 (SMG)

Generally speaking the SMG will not let you damage the engine or gearbox...

That being said if you lift on WOT shifts or do other violent things... you can increase the wear and tear on your car which can lead to premature wear and tear on bushings, tranny/engine mounts, guibo, diff mounts, diff or subframe failure (rare).
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Old Thu, Jun-28-2012, 05:31:22 AM   #5
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Default Re: Is this healthy for an M3 (SMG)

like stated above u dont not need to lift when shifting. This information is also available to you in your Owners Manual
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Old Thu, Jun-28-2012, 05:31:46 AM   #6
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Default Re: Is this healthy for an M3 (SMG)

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Originally Posted by Foo2rama View Post
Generally speaking the SMG will not let you damage the engine or gearbox...

That being said if you lift on WOT shifts or do other violent things... you can increase the wear and tear on your car which can lead to premature wear and tear on bushings, tranny/engine mounts, guibo, diff mounts, diff or subframe failure (rare).
Okay, thanks, so I DON'T need to lift the pedal off. Now, what about dropping it from 6 to third? (Pressing the left paddle 3 times quickly, and gunning it...) Is that safe to do?
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Old Thu, Jun-28-2012, 07:16:39 AM   #7
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Default Re: Is this healthy for an M3 (SMG)

Depends on what speed you're going...
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Old Thu, Jun-28-2012, 07:17:25 AM   #8
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Default Re: Is this healthy for an M3 (SMG)

Why would you assume its unsafe? If dumping it to third still allows for safe engine rpm, I see no problem. I do it all the the time anywhere between 70-80 MPH. Would you hesitate to do it in a MT????? Remember the SMG is the same gear box.
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Old Thu, Jun-28-2012, 07:34:43 AM   #9
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Default Re: Is this healthy for an M3 (SMG)

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Originally Posted by M3ANMACHINE View Post
Depends on what speed you're going...
Well in an SMG if he's going too fast (fast enough that the RPMs in 3rd are redline) the car simply won't go into 3rd.

I say if the transmission lets you do it, there's no problem. (I love dropping into 3rd for dat acceleration)
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Old Thu, Jun-28-2012, 07:39:14 AM   #10
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Default Re: Is this healthy for an M3 (SMG)

Not harmful for the tranny at all, it is the same transmission as the 6MT.
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Discussing Is this healthy for an M3 (SMG) in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)