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Discussion Starter #1 (Edited)
04***8217; SMG tranny has a lag in shifting between all gears. I replaced the detent springs ( they were not broken). Has anyone else had this issue? I replaced the relay and fluids.
 

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04' SMG tranny has a lag in shifting between all gears. I replaced the detent springs ( they were not broken). Has anyone else had this issue? I replaced the relay and fluids.
By "fluids" you mean both the transmission fluid AND the SMG Pentosin, correct? And presumably you have the firmness/quickness selector turned up. If yes to all the above, or if changing that selector doesn't produce a noticeable difference, then I'd look at that switch. Unfortunately after all of that (in that order), I***8217;m left to suspect the pump. But first make sure BOTH fluids were changed and see if that selector actually does what it***8217;s supposed to do.

maw
 

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Is your SMG all stock? Highly recommend getting the MSS5x Binary Modification Tool. You can flash the CSL 255 SMG software as well as many other options. It completely transforms the way the SMG shifts.

https://nam3forum.com/forums/forum/special-interests/coding-tuning/8701-mss5x-binary-modification-tool-update

– 155MPH Limiter removal
– SMG Style Shift lights on 6 Speed Manual cars (E46 Only)
– Sport button memory (remembers last setting after shutting off the vehicle).
– Dyno limit removal
– Rev limiter adjustment
– CSL SMG Shift / Rev matching + Inertia fix (E46 Only)
– Disable secondary air pump from running on cold start
– Enable burble and pop on over run / lift off (Childish but some love it)
– Disable fault code / check engine light for physical removal of the secondary air pump
– Disable fault codes / check engine light for cat deletes
– Disable fault codes for rear O2 removal
– EWS delete
– Comfort throttle map adjustment
– Sport throttle map adjustment
– Warm up light changes
– Transmission Swap (Manual to SMG and visa versa)
– SMG Final Drive Swap
– CSL Intake Flap Delete
– Cruise control enable (CSL / CSL Clone only)
– IAT Temp Sensor swap/re-scale
– MAP Sensor Swap/re-scale
– E39 M5 Servotronic Adjustment (Sport and Comfort)
– AlphaN enable/MAF Delete (E46 only)
– Disable cat protection (disables enrichment under high EGTs)
– Disable EGT Monitoring
– CSL Intake Flap opening control (CSL / CSL Clone only)
– Checksum correction


 

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Discussion Starter #5
The switch doesn***8217;t change the shifting. Is a broke switch a common problem? If so, where can I buy it?
Also, I***8217;m not familiar with that tool. Where can I purchase the tool?
 

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The switch doesn't change the shifting. Is a broke switch a common problem? If so, where can I buy it?
Also, I'm not familiar with that tool. Where can I purchase the tool?
I don't know how common a switch fault is a problem, but its something to test before you condemn your pump. But what you've told us is: (1) both the SMG pump and the transmission have fresh fluid; (2) the switch does not affect shift speed or quality as it should; yet (3) the car shifts, so both the pump and the transmission are functioning on some level.

Either the car CANNOT shift fast and firm or the car ISN'T BEING TOLD to shift fast and firm. We're hoping it's the latter. Make sense?

Here's another test. Put the car in automatic shift mode, turn off the traction control and floor it from a stop. My guess is you'll get fast and firm shifts then. But try it and report back.

maw
 

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OP,
I just converted my SMG to manual and I have all the SMG parts in my garage, including the switch for the gearselect speed. The SMG stuff is all working well. I did the conversion because I had the engine out. PM me if you need anything.
 

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The SMG Mode switch most definitely changes the shift speed.

The DRIVELOGIC Control makes it possible for the driver to adapt the gearshift characteristics of the transmission to his own individual style with each driving mode (A-Mode, S- Mode).

The DRIVELOGIC control button provides two inputs to the SMG II control unit. Both inputs are momentary switched grounds, one for program mode up and one for program mode down. DRIVELOGIC Control provides selection of 5 programs in the A-Mode and 6 programs in the S-Mode. The individual programs differ as follows:

• A-Mode
There are 5 automated gearshift programs from A1(Winter mode, vehicle starts off in 2nd gear) to A5 (Sport mode, a highly dynamic program).

• S-Mode
There are 6 different sequential gearshift programs from S1 (Slow, relaxed shifts with soft clutch engagement) to S6 ( Very fast shifts with quick clutch engagement, only accessible with DSC turned off).


Try doing the SMG paddle reset procedure.



Read this thread as well.

https://forums.m3cutters.co.uk/threads/please-help-slow-gear-change-smg-bmw-m3-e46-2005-47k-miles.22553/
 

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You don't need to buy any software to fix this or speed up shifting.
True but if you own a SMG and don’t have the CSL 255 SMG Shift / Rev matching + Inertia fix you are really missing out!
 

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True but if you own a SMG and don't have the CSL 255 SMG Shift / Rev matching + Inertia fix you are really missing out!
Yeah, I've done it on several M3s. I found no substantial, scientific evidence that the software change provides any benefit. Performance is the same. This is evidence backed by multiple people and multiple cars on a track surface.

Do I recommend it anymore? I do not. Do I care if you do it? I do not.

My newest (E46) M3 is not getting it flashed. I got so annoyed at the CSL software always starting in auto mode. The only beneficial thing I found was the diff ratio adjustment and that is the only tranny-related adjustment I have done.
 

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You are the first person I’ve heard of that did not notice a difference and do not recommend it. To each is own...
 

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Yeah, I've done it on several M3s. I found no substantial, scientific evidence that the software change provides any benefit. Performance is the same. This is evidence backed by multiple people and multiple cars on a track surface.

Do I recommend it anymore? I do not. Do I care if you do it? I do not.

My newest (E46) M3 is not getting it flashed. I got so annoyed at the CSL software always starting in auto mode. The only beneficial thing I found was the diff ratio adjustment and that is the only tranny-related adjustment I have done.
Just swap it then dude. Anything else won't help. Especially if it's a us version. We don't get the cool shit. Maybe smg just isn't your cup of tea. It's all good if not but those csl parameters are totally different than us parameters with the'255 software. Which doesn't give performance but smooths everything out, ALMOST Dct style but with a tenth of two sec difference than a Dct in each gear. At least compared to the e92. Ratios are different but the gear shift are really close.

Sent from my Pixel using Tapatalk
 

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Yeah, I've done it on several M3s. I found no substantial, scientific evidence that the software change provides any benefit. Performance is the same. This is evidence backed by multiple people and multiple cars on a track surface.

Do I recommend it anymore? I do not. Do I care if you do it? I do not.

My newest (E46) M3 is not getting it flashed. I got so annoyed at the CSL software always starting in auto mode. The only beneficial thing I found was the diff ratio adjustment and that is the only tranny-related adjustment I have done.
If you haven't noticed a difference, you haven't done the DME side of the flash.
 

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Discussion Starter #20
I***8217;m just going to take it to a local ***8220;SMG***8221; specialist. Whatever that means. It***8217;s called Fifth Gear Automotive in Lewisville Tx. Wish me luck
 
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