07-23-2018, 01:16 PM | #1 |
Private
44
Rep 83
Posts |
Info on F30 335i 6MT transmission/upgrades
I recently picked up a 2015 335i M Sport with the 6MT. I'm fairly sure this is the ZF S6-53 but I could be wrong. I was just wondering the capabilities and limits of the stock form of this transmission in terms of future engine mods. Also, if I were to need to upgrade it to hold more power in the future, where should I look for stuff of that nature?
|
07-23-2018, 02:28 PM | #2 | |
Major General
5559
Rep 5,374
Posts |
Quote:
The weakest link in these trannies is the 1-2 syncro. I strongly suggest not slamming the 1-2 often, especially if you have mods. If you do hit the 1-2 hard, please make sure the fluid is fully warm (i.e., at least 10 to 15 minutes of steady driving). I think a lot of people that have had 1-2 syncro issues are because they are slamming the 1-2 on cold fluid and/or running a lot more torque than stock. There is a ton of torque multiplication and wheel torque in 1st and 2nd. The tranny itself is stout. All that needs upgrading is the clutch if you're running quite a bit more power than stock.
__________________
The forest was shrinking, but the Trees kept voting for the Axe, for the Axe was clever and convinced the Trees that because his handle was made of wood, he was one of them.
|
|
Appreciate
1
6SpeedCrewCab44.00 |
07-23-2018, 02:32 PM | #3 |
Lieutenant Colonel
1106
Rep 1,499
Posts |
I'm not sure about the stock clutch but I've read that upgrading to the 550i clutch is a popular upgrade. ECS Tuning has the replacement clutch kit for $380. I have 65k on my F30 and have been tuned for over 15k with no slipping but once my clutch starts to go I plan to upgrade to this kit.
https://www.ecstuning.com/b-genuine-...n/21207603248/
__________________
2014 F30 335i, M-Sport, 6MT, V804s, custom exhaust, CTS Turbo Intake & IC, FTP CP, VRSF DP, TMS Strut Brace, BM3 Stg 2, AEM WMI, H&R Sport Springs (381 whp, 429 wtq on Cali 91oct before WMI). SPI Films Blog/DIY Vids |
Appreciate
0
|
07-23-2018, 02:40 PM | #4 |
Private
27
Rep 66
Posts |
Delete the clutch delay valve!! It was my biggest gripe about the f chassis manual Bmw. Your shifts will be smoother along with being able to rev match on downshifts
__________________
15 Estoril/Coral 435i coupe M-sport
96 Estoril/M-Cross M3 coupe 85 Delphin/Comfort 318i coupe |
Appreciate
0
|
07-23-2018, 02:47 PM | #5 | |
Private
44
Rep 83
Posts |
Quote:
|
|
Appreciate
0
|
07-23-2018, 02:52 PM | #6 |
Captain
1171
Rep 969
Posts |
I did 500+ lb of torque on old setup with stock turbo on a few pulls, we tapered it down a bit down low but that was last revision I ran. I'm now on turbo upgrade (PS2) with 400+ whp 455+ trq (haven't dyno current boost level) .... but original clutch and tranny still grab like a MFer! They are pretty stout, just don't beat the shit out of the car. I definitely drive my car hard, but I never power shift or launch like crazy... not worth .1 seconds here and there, at least for me.
BTW over 40 dyno pulls and probably 50 runs at the track. I think you will be okay, congrats on new ride. 6 speed FTW
__________________
Last edited by F30_SixSpeed; 07-23-2018 at 03:14 PM.. |
Appreciate
3
|
07-23-2018, 03:48 PM | #7 |
Lieutenant Colonel
1106
Rep 1,499
Posts |
Whoa Whoa Whoa....there is a CDV delete solution? Last I read about this the CDV was internal and could not be deleted. Please post more info.
__________________
2014 F30 335i, M-Sport, 6MT, V804s, custom exhaust, CTS Turbo Intake & IC, FTP CP, VRSF DP, TMS Strut Brace, BM3 Stg 2, AEM WMI, H&R Sport Springs (381 whp, 429 wtq on Cali 91oct before WMI). SPI Films Blog/DIY Vids |
Appreciate
0
|
07-23-2018, 04:16 PM | #8 | |
Private
44
Rep 83
Posts |
Quote:
|
|
Appreciate
0
|
07-23-2018, 06:27 PM | #9 | |
Major
559
Rep 1,127
Posts |
Quote:
|
|
Appreciate
0
|
07-24-2018, 12:24 PM | #10 |
Private First Class
22
Rep 134
Posts |
The 1st to 2nd syncro is pretty terrible in this tranny. Also the clutch delay value is terrible and will cause the clutch to slip bad on quick shifts.
The stock clutch will hold stage 2 power fine though. Honestly though the 6MT gearbox in this car makes me want to trade it in, it grinds from 1st to 2nd full throttle since the syncro is going out. Not worth replacing the gearbox as the problem will most likely come back due to a flawed design |
Appreciate
0
|
07-24-2018, 12:32 PM | #11 | |
Private
44
Rep 83
Posts |
Quote:
|
|
Appreciate
0
|
07-25-2018, 10:05 PM | #12 |
Private First Class
22
Rep 134
Posts |
I bought the car with 60k now it has 75k. The sycro was fine when I got it but broke 5k miles into ownership. Was stock power when it broke. The clutch has always slipped on hard shifts due to the CDV.
|
Appreciate
0
|
07-26-2018, 08:13 AM | #13 |
Lieutenant Colonel
1106
Rep 1,499
Posts |
Really! I can break loose from 1st to 2nd and 2nd to 3rd and I still have stock clutch and CDV with 65k on the odo.
__________________
2014 F30 335i, M-Sport, 6MT, V804s, custom exhaust, CTS Turbo Intake & IC, FTP CP, VRSF DP, TMS Strut Brace, BM3 Stg 2, AEM WMI, H&R Sport Springs (381 whp, 429 wtq on Cali 91oct before WMI). SPI Films Blog/DIY Vids |
Appreciate
0
|
07-26-2018, 10:45 AM | #14 |
Private
44
Rep 83
Posts |
|
Appreciate
0
|
07-27-2018, 01:54 AM | #15 | |
Colonel
2000
Rep 2,499
Posts |
Quote:
My car had its transmission replaced under warranty due to a failing 2nd gear synchro. I noticed it when it was new to me, so I have no idea how it was treated. As long as you go easy on the 1-2 shift, you should be OK. It might also be a good idea to switch the MTF out to Redline. |
|
Appreciate
0
|
07-29-2018, 02:19 PM | #16 |
Major
559
Rep 1,127
Posts |
Yeah the power-train seems designed to do everything it can to stop the drivers from shifting aggressively.
|
Appreciate
0
|
07-29-2018, 02:21 PM | #17 |
Major
559
Rep 1,127
Posts |
|
Appreciate
0
|
05-03-2021, 06:45 PM | #18 | |
Private
30
Rep 69
Posts |
Quote:
I find people saying the only difference between the f30 335i and the m2/3/4 tranny is that they added beefier synchros in the m2/3/4. But I don’t see a single person Recommending to put that transmission into the 335I. Will the transmission from the M2/3/4 bolt directly into the f30 335i?? I would assume it doesn’t bolt in or I would see this recommended somewhere. As I see so many people with synchro problems in the 335i but nobody recommends upgrading to the m2/3/4 tranny?? I have a bad 1-2 synchro in my 2014 f30 335i transmission. This car has the ZF GS6-45BZ transmission in it. Am I able to swap it with a m2/3/4 tranny? |
|
Appreciate
0
|
03-08-2022, 12:51 PM | #19 | |
Enlisted Member
39
Rep 45
Posts |
Quote:
|
|
Appreciate
0
|
03-08-2022, 02:53 PM | #20 |
Major General
4367
Rep 7,613
Posts |
|
Appreciate
0
|
03-08-2022, 07:06 PM | #21 | |
Head Fry Cook at McBurgertown
507
Rep 1,005
Posts |
Quote:
All the evidence I can find says it should bolt right in. A less expensive alternative is to get the N54 version, although they don't have a pre-drilled location for the neutral position sensor - so you either have to get creative with fabbing or coding to get around that particular issue. |
|
Appreciate
0
|
03-09-2022, 10:21 PM | #22 | ||
Major
483
Rep 1,066
Posts |
Quote:
__________________
MY13: TTE400 Stage 2 turbo.
e80 tune by Navardi Tuned. 380 whp/360 wheel torque stock block Build Thread: https://f30.bimmerpost.com/forums/sh....php?t=1742413 IG + YT: Sqwin_n20 |
||
Appreciate
0
|
Post Reply |
Bookmarks |
|
|