Things that makes you go hmmm

ricardofors68 · 12-22-2018, 08:15 AM

So one of my 19 wheels cracked, sucks. Took them off and put the stock 18 stuff and immediately noticed that the transmission started shifting smoothly again. With the 19s 1st to 2nd and sometimes to 3rd the transition was super harsh. Anyone out there noticed something similar?

vooonoo · 12-22-2018, 12:32 PM

What kind of 19s did you have. Maybe theyre just too heavy

ricardofors68 · 12-22-2018, 01:03 PM

Some Zito wheels, not the heaviest out there, didn't think that weight would affect the trans. shifting , not sure how much they weight though.

kern417 · 12-22-2018, 01:09 PM

Bigger wheels put a bigger load on the transmission. Partially because you increase the overall weight, mostly because you shift the majority of the weight farther from the center of the hub (think like a pendulum). But ultimately 19s shouldn't make that much of a difference. Especially considering OEM 19s are like concrete bricks.

ricardofors68 · 12-22-2018, 01:11 PM

Quote:

Originally Posted by kern417

Bigger wheels put a bigger load on the transmission. Partially because you increase the overall weight, mostly because you shift the majority of the weight farther from the center of the hub (think like a pendulum). But ultimately 19s shouldn't make that much of a difference. Especially considering OEM 19s are like concrete bricks.

This was my reasoning.

cfm56d7b · 12-22-2018, 02:01 PM

Is your vehicle under warranty? Transmission adaptation programming can be reset by the dealer.

ricardofors68 · 12-22-2018, 02:24 PM

No warranty. I thought there was a way for us to reset the adaptations ourselves,

HighlandPete · 12-22-2018, 02:30 PM

Quote:

Originally Posted by ricardofors68

So one of my 19 wheels cracked, sucks. Took them off and put the stock 18 stuff and immediately noticed that the transmission started shifting smoothly again. With the 19s 1st to 2nd and sometimes to 3rd the transition was super harsh. Anyone out there noticed something similar?

Is this on the xDrive? If so I'd be looking more to tires than the rim size. All tires BMW star marked? OE sizes, or any variables?

ricardofors68 · 12-22-2018, 02:37 PM

Yes, 328 Xdrive, tire sizes 235/35-19 and 265/30-19

HighlandPete · 12-22-2018, 03:27 PM

Quote:

Originally Posted by ricardofors68

Yes, 328 Xdrive, tire sizes 235/35-19 and 265/30-19

Probably transmission isn't accommodating the bigger difference in RC than OE sizing. If treads depths are different, front to rear, could be making it even worse. Showing up in bad changes.

18" wheels, are tires OE sizes?

ricardofors68 · 12-22-2018, 05:41 PM

Quote:

Originally Posted by HighlandPete

Probably transmission isn't accommodating the bigger difference in RC than OE sizing. If treads depths are different, front to rear, could be making it even worse. Showing up in bad changes.

18" wheels, are tires OE sizes?

Yes, OE sizes 225 squared.

HighlandPete · 12-23-2018, 02:53 AM

Quote:

Originally Posted by ricardofors68

Yes, OE sizes 225 squared.

I'd wager your gearbox harshness is due to the tires pushing the tolerance limits for the xDrive system. Transmission now back in tolerance on EO sized tires. You won't be the first or last to suffer some sort of transmission issues due to the wrong tire tolerances.

eluded · 12-23-2018, 03:12 AM

Love the title of this thread.

movietub · 12-23-2018, 03:00 PM

I have 20's on my F36 and no such issue here, and that's coming from an F31 with 18's.

Of course the bigger wheels do add strain to the transmission as they effectively 'gear up' the entire transmission. But if you noticed issues with the larger wheels, it could well be an early indicator of a transmission problem. Or it could also be that BMW altered the transmission program to match the wheels originally fitted to the car. That would also make a great deal of sense as it would mean that all cars offered the smoothest experience, regardless of wheel options.

Might be well worth just calling BMW care and asking.

HighlandPete · 12-24-2018, 06:02 AM

Quote:

Originally Posted by movietub

Might be well worth just calling BMW care and asking.

It's the last thing many would want to do, knowing the car is not on an OE tire combination for 20" wheels.

I'm sure they will ask if the tires are OE sizes and BMW star marked. Particularly as it is xDrive, with the customer raising a suspected transmission issue.

HighlandPete · 12-24-2018, 06:05 AM

Quote:

Originally Posted by movietub

I have 20's on my F36 and no such issue here, and that's coming from an F31 with 18's.

Are you xDrive? Running non standard tyre sizes?

OP has a non standard setup and on xDrive.

switchman8 · 12-25-2018, 10:26 PM

Im guessing its the 2% smaller than stock sizing thats affecting it.

ricardofors68 · 01-09-2019, 06:41 PM

Quote:

Originally Posted by switchman8

Im guessing its the 2% smaller than stock sizing thats affecting it.

Seems so, if so, I guess I would have to pay attention to tire diameter if I want to keep the 19in hoops

Gen13 F36 · 01-09-2019, 09:04 PM

Quote:

Originally Posted by ricardofors68

Seems so, if so, I guess I would have to pay attention to tire diameter if I want to keep the 19in hoops

just go 19" square setup, its an xdrive, you can rotate too

bimmer456 · 01-10-2019, 03:18 AM

X drive can have issues when using aftermarket rims. You will need to make sure your total wheel and tire diameter is the same as stock for your vehicle or it will act up, especially if you have a staggered setup. I think it has to be square.

jmg · 01-10-2019, 01:01 PM

Quote:

Originally Posted by ricardofors68

Yes, 328 Xdrive, tire sizes 235/35-19 and 265/30-19

It seems like this discussion comes up every few years and each time it usually goes something like this:

1) Someone wants to run staggered on an AWD setup.

2) Someone else tells them they should run square because it will put strain on the drivetrain.

3) Someone argues that the change is within tolerances.

4) We choose to believe that it is within tolerances because it looks cooler.

Rise. repeat.

I said this 18 years ago when I was driving an Audi A4 Quattro: Run squared. That's what the system was designed for.

Rise. repeat.

12-22-2018, 08:15 AM	#1
ricardofors68 Lieutenant 326 Rep 535 Posts Drives: '15 F10 M5 Join Date: Nov 2017 Location: DMV Area iTrader: (3)	Things that makes you go hmmm So one of my 19 wheels cracked, sucks. Took them off and put the stock 18 stuff and immediately noticed that the transmission started shifting smoothly again. With the 19s 1st to 2nd and sometimes to 3rd the transition was super harsh. Anyone out there noticed something similar? __________________ '17 C7 Vette GS (bye) / '15 F31 328 ix (sold) / '08 E92 335i (sold)/ '08 E92 M3 (RIP)/'01 M5 (sold, sniff)/'07 M5 (sold)/ '15 M5
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12-22-2018, 12:32 PM	#2
vooonoo ¯\_(ツ)_/¯ 537 Rep 1,000 Posts Drives: f30 328 Join Date: Nov 2017 Location: nj iTrader: (0) Garage List 2014 f30 328i [0.00]	What kind of 19s did you have. Maybe theyre just too heavy
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12-22-2018, 01:03 PM	#3
ricardofors68 Lieutenant 326 Rep 535 Posts Drives: '15 F10 M5 Join Date: Nov 2017 Location: DMV Area iTrader: (3)	Some Zito wheels, not the heaviest out there, didn't think that weight would affect the trans. shifting , not sure how much they weight though. __________________ '17 C7 Vette GS (bye) / '15 F31 328 ix (sold) / '08 E92 335i (sold)/ '08 E92 M3 (RIP)/'01 M5 (sold, sniff)/'07 M5 (sold)/ '15 M5
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12-22-2018, 02:01 PM	#6
cfm56d7b Lieutenant General 5876 Rep 10,251 Posts Drives: 2017 440i Gran Coupe & 2015 X5 Join Date: Nov 2012 Location: Orange County, CA iTrader: (2)	Is your vehicle under warranty? Transmission adaptation programming can be reset by the dealer.
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12-22-2018, 02:24 PM	#7
ricardofors68 Lieutenant 326 Rep 535 Posts Drives: '15 F10 M5 Join Date: Nov 2017 Location: DMV Area iTrader: (3)	No warranty. I thought there was a way for us to reset the adaptations ourselves, __________________ '17 C7 Vette GS (bye) / '15 F31 328 ix (sold) / '08 E92 335i (sold)/ '08 E92 M3 (RIP)/'01 M5 (sold, sniff)/'07 M5 (sold)/ '15 M5
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12-22-2018, 02:37 PM	#9
ricardofors68 Lieutenant 326 Rep 535 Posts Drives: '15 F10 M5 Join Date: Nov 2017 Location: DMV Area iTrader: (3)	Yes, 328 Xdrive, tire sizes 235/35-19 and 265/30-19 __________________ '17 C7 Vette GS (bye) / '15 F31 328 ix (sold) / '08 E92 335i (sold)/ '08 E92 M3 (RIP)/'01 M5 (sold, sniff)/'07 M5 (sold)/ '15 M5
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12-23-2018, 03:12 AM	#13
eluded 2JZ-GTE 3029 Rep 3,991 Posts Drives: 340 6MT, 50e, others Join Date: Nov 2015 Location: Sofia iTrader: (0)	Love the title of this thread. __________________ A man who views the world the same at 50 as he did at 20 has wasted 30 years of his life.
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12-23-2018, 03:00 PM	#14
movietub First Lieutenant 101 Rep 337 Posts Drives: 330d M-Sport Touring, Black. Join Date: Nov 2012 Location: Stamford iTrader: (0)	I have 20's on my F36 and no such issue here, and that's coming from an F31 with 18's. Of course the bigger wheels do add strain to the transmission as they effectively 'gear up' the entire transmission. But if you noticed issues with the larger wheels, it could well be an early indicator of a transmission problem. Or it could also be that BMW altered the transmission program to match the wheels originally fitted to the car. That would also make a great deal of sense as it would mean that all cars offered the smoothest experience, regardless of wheel options. Might be well worth just calling BMW care and asking.
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12-25-2018, 10:26 PM	#17
switchman8 Private 12 Rep 52 Posts Drives: 435i Join Date: Oct 2014 Location: Sask, Canada iTrader: (0)	Im guessing its the 2% smaller than stock sizing thats affecting it. __________________ 2016 435i xdrive 2014 235i - traded
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01-10-2019, 03:18 AM	#20
bimmer456 Major General 2959 Rep 5,989 Posts Drives: 340i Join Date: Nov 2016 Location: Pasadena, CA iTrader: (0)	X drive can have issues when using aftermarket rims. You will need to make sure your total wheel and tire diameter is the same as stock for your vehicle or it will act up, especially if you have a staggered setup. I think it has to be square.
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