BMW 335i Stock... SMG shift question

mtnbiker326 · 08-16-2016, 11:32 AM

Hello Everyone,

I have a rather odd question.

My e90 335i is completely stock. AT trans and sport package. (78000 miles)

I recently (3-4k miles ago) changed the trans fluid and filter as the trans was shifting a little rough. I made sure I verified the correct amount of fluid was used (twice)... once myself and another at an INDY.

Now, after the trans gets up to operating temp, it shifts about the same roughness as before. It is not smooth on cold start (normal) but once temps and oil starts flowing (about 10 min into drive) the transmission shifts like butter. It is awesome. Once operating temp is achieved, it starts shifting rough/hesitating again.

Any thoughts?

I have thought that there could be a block in the trans cooler, could be oil fluid level (still possible), etc.

Turkish Mafia · 08-16-2016, 12:25 PM

Solenoids.

jjbmuu · 08-16-2016, 12:46 PM

Mechatronics.

TrollToll · 08-16-2016, 12:50 PM

Words

marcvtec · 08-16-2016, 03:42 PM

ummm,
what fluid did you use ?
would be the first question

mtnbiker326 · 08-16-2016, 03:46 PM

Thank you.

mtnbiker326 · 08-16-2016, 03:48 PM

Quote:

Originally Posted by marcvtec

ummm,
what fluid did you use ?
would be the first question

I used the OE ZF branded transmission fluid. I didn't use some off the shelf fluid (Mobil1, Shell, Royal Purple, etc.)

marcvtec · 08-16-2016, 05:37 PM

Since it was running rough prior to the new fluid, try some royal purple instead.

V8bait · 08-17-2016, 01:16 PM

It's probably the SMG hydraulic pump. They fail a lot.

But a better question is how did you get the SMG into a 335i, very impressive sir.

veee8 · 08-17-2016, 02:24 PM

Quote:

Originally Posted by V8bait

It's probably the SMG hydraulic pump. They fail a lot.

But a better question is how did you get the SMG into a 335i, very impressive sir.

"like"

Sered · 08-17-2016, 02:38 PM

Quote:

Originally Posted by V8bait

It's probably the SMG hydraulic pump. They fail a lot.

But a better question is how did you get the SMG into a 335i, very impressive sir.

Came here to make a similar statement. You saved me the trouble

Jeff@TopGearSolutions · 08-17-2016, 04:54 PM

SMG in a 335i...just when you thought you couldn't make the car any more unreliable... LOL

Sgop335 · 08-17-2016, 05:17 PM

Quote:

Originally Posted by mtnbiker326

Hello Everyone,

I have a rather odd question.

My e90 335i is completely stock. AT trans and sport package. (78000 miles)

I recently (3-4k miles ago) changed the trans fluid and filter as the trans was shifting a little rough. I made sure I verified the correct amount of fluid was used (twice)... once myself and another at an INDY.

Now, after the trans gets up to operating temp, it shifts about the same roughness as before. It is not smooth on cold start (normal) but once temps and oil starts flowing (about 10 min into drive) the transmission shifts like butter. It is awesome. Once operating temp is achieved, it starts shifting rough/hesitating again.

Any thoughts?

I have thought that there could be a block in the trans cooler, could be oil fluid level (still possible), etc.

I did the atf change last week. You may have correctly, but did you fill new oil w the car running and cycling thru prnd?

08-16-2016, 11:32 AM	#1
mtnbiker326 New Member 0 Rep 13 Posts Drives: 335i Join Date: Oct 2013 Location: Southwest iTrader: (0)	BMW 335i Stock... SMG shift question Hello Everyone, I have a rather odd question. My e90 335i is completely stock. AT trans and sport package. (78000 miles) I recently (3-4k miles ago) changed the trans fluid and filter as the trans was shifting a little rough. I made sure I verified the correct amount of fluid was used (twice)... once myself and another at an INDY. Now, after the trans gets up to operating temp, it shifts about the same roughness as before. It is not smooth on cold start (normal) but once temps and oil starts flowing (about 10 min into drive) the transmission shifts like butter. It is awesome. Once operating temp is achieved, it starts shifting rough/hesitating again. Any thoughts? I have thought that there could be a block in the trans cooler, could be oil fluid level (still possible), etc. __________________ 2009 335i e90 \| Montego Blue \| Black \| 6AT \| Sports Pack (with aux oil cooler) \| Premium \| NAV \| Alum \| Rues Audio \| Heated Seats \| USB/Ipod \| ADAM'S PRODUCTS PROTECTED \| Cobb V3 Last edited by mtnbiker326; 08-16-2016 at 11:48 AM.. Reason: mileage needed.
	Appreciate 0 Tweet Quote

08-16-2016, 12:25 PM	#2
Turkish Mafia Captain 92 Rep 709 Posts Drives: E92 335i (6/2007) Join Date: Apr 2007 Location: NYC iTrader: (4)	Solenoids.
	Appreciate 1 Quote

08-16-2016, 12:46 PM	#3
jjbmuu 4ut0strd4 47 Rep 223 Posts Drives: 08 AW E92 335i 6 Speed Join Date: Nov 2011 Location: Florida iTrader: (0)	Mechatronics.
	Appreciate 1 Turkish Mafia91.50 Quote

08-16-2016, 12:50 PM	#4
TrollToll Banned 654 Rep 946 Posts Drives: 535i Join Date: Sep 2015 Location: Texas iTrader: (0)	Words
	Appreciate 1 Turkish Mafia91.50 Quote

08-16-2016, 03:42 PM	#5
marcvtec Banned 407 Rep 2,704 Posts Drives: M5 Join Date: Oct 2006 Location: toronto iTrader: (0)	ummm, what fluid did you use ? would be the first question
	Appreciate 0 Quote

08-16-2016, 03:46 PM	#6
mtnbiker326 New Member 0 Rep 13 Posts Drives: 335i Join Date: Oct 2013 Location: Southwest iTrader: (0)	Thank you. __________________ 2009 335i e90 \| Montego Blue \| Black \| 6AT \| Sports Pack (with aux oil cooler) \| Premium \| NAV \| Alum \| Rues Audio \| Heated Seats \| USB/Ipod \| ADAM'S PRODUCTS PROTECTED \| Cobb V3
	Appreciate 0 Quote

08-16-2016, 05:37 PM	#8
marcvtec Banned 407 Rep 2,704 Posts Drives: M5 Join Date: Oct 2006 Location: toronto iTrader: (0)	Since it was running rough prior to the new fluid, try some royal purple instead.
	Appreciate 0 Quote

08-17-2016, 01:16 PM	#9
V8bait Lieutenant 406 Rep 574 Posts Drives: e92 335i 6mt Join Date: Oct 2011 Location: Houston iTrader: (1)	It's probably the SMG hydraulic pump. They fail a lot. But a better question is how did you get the SMG into a 335i, very impressive sir.
	Appreciate 1 TrollToll654.00 Quote

08-17-2016, 04:54 PM	#12
Jeff@TopGearSolutions 3441 Rep 79,211 Posts Drives: C6 Z06, 09 335i, 10 335xi Join Date: Dec 2008 Location: www.TopGearSolutions.com iTrader: (37)	SMG in a 335i...just when you thought you couldn't make the car any more unreliable... LOL
	Appreciate 0 Quote