Violent Shift

M302_imola · 11-19-2019, 10:16 AM

For the past several weeks I've noticed a more violent shift periodically when getting up to speed on the interstate. If I smash the accelerator on the on ramp the tranny acts normal, but if I'm gradually building speed I can feel a more violent shift around the 60mph mark. Has me a bit worried. Approaching 80K miles and have recently put thought into a tranny fluid drain and fill. You guys think this would help? I will note I've got the RC GTS black w/ app control and I typically leave it in race mode, but I've been running it since June and I'm just now noticing these shifts. Thoughts?

turboawd · 11-19-2019, 10:23 AM

Put your tune in stock mode to see if it still does the hard shift.

M302_imola · 11-19-2019, 10:38 AM

Quote:

Originally Posted by turboawd

Put your tune in stock mode to see if it still does the hard shift.

Ok, yeah I had that thought too. It only happens periodically so might be hard to determine but I'll try it.

M302_imola · 11-20-2019, 10:29 AM

Happened again this morning, but almost felt like a misfire. CEL illuminated so I'll get it read and report back. Note, GTS black was still enabled at the time of the CEL.

turboawd · 11-20-2019, 11:06 AM

You need to read the code. Could be a misfire. Possibly need plugs, especially with a tune you have.

sj22 · 11-21-2019, 12:28 AM

+1 on plugs. Both RC and even bm3 I recently had worked very smoothly for 1st 10k or so miles, then choppy.

M302_imola · 11-21-2019, 10:43 AM

Quote:

Originally Posted by M302_imola

Happened again this morning, but almost felt like a misfire. CEL illuminated so I'll get it read and report back. Note, GTS black was still enabled at the time of the CEL.

Quote:

Originally Posted by sj22

+1 on plugs. Both RC and even bm3 I recently had worked very smoothly for 1st 10k or so miles, then choppy.

Plugs were replaced about 10K miles ago.

CEL went off before I could have it read. That's nothing new though, as it throws a CEL often with RC in race mode. I can't remember the specific code but it's description was something like "to much air". Anyhow, the code will come on for a day or two then disappear. Car drives fine with it on.

Car behaved normal this morning on my way into work. Note, I turned the RC off yesterday so the two might be correlated. I'll test it out some more.

sj22, can you elaborate a bit more on the choppiness?

alphaod · 11-21-2019, 10:46 AM

I get a hard shift at low RPM sometimes when the engine is cold.

sj22 · 11-21-2019, 12:54 PM

Quote:

Originally Posted by M302_imola

Plugs were replaced about 10K miles ago.
sj22, can you elaborate a bit more on the choppiness?

Mine were around 15k ago too. Basically started noticing more jerky sports mode starts in cold weather and some very jerky shifts. Removed BM3 recently for another reason, surprised that sports mode is smooth again.

You can also reset transmission adaptations.

Basically I think the jerky shifts come quite early compared to an actual CEL.

M302_imola · 11-22-2019, 10:18 AM

Quote:

Originally Posted by alphaod

I get a hard shift at low RPM sometimes when the engine is cold.

That's pretty much my scenario.

M302_imola · 11-22-2019, 10:22 AM

Quote:

Originally Posted by sj22

Mine were around 15k ago too. Basically started noticing more jerky sports mode starts in cold weather and some very jerky shifts. Removed BM3 recently for another reason, surprised that sports mode is smooth again.

You can also reset transmission adaptations.

Basically I think the jerky shifts come quite early compared to an actual CEL.

I see...I rarely use sports mode as I don't like how the tranny holds the gear. Only been a few days since tune is back to stock but I've noticed how smooth everything is now. I obviously like the extra hp/torque the RC gives but like you said it's become a bit choppy and unpredictable lately.

M302_imola · 12-04-2019, 10:46 AM

Reverted back to the RC race setting last week and noticed when I floored it I could hear the boost dump into the engine bay making a gush sound. The lack of boost was apparent as far as acceleration. I popped the hood looking for a possible leak but didn't see one. I'll investigate further this weekend. I've replaced the upper charge pipe. Maybe the leak is coming from the lower portion

Anyone experienced this?

jg425 · 12-04-2019, 11:22 PM

Quote:

Originally Posted by M302_imola

Reverted back to the RC race setting last week and noticed when I floored it I could hear the boost dump into the engine bay making a gush sound. The lack of boost was apparent as far as acceleration. I popped the hood looking for a possible leak but didn't see one. I'll investigate further this weekend. I've replaced the upper charge pipe. Maybe the leak is coming from the lower portion

Anyone experienced this?

I had similar issues as you, I had a leak on the chargepipe. I think its the fuel tank bypass hose, anyway whatever it is, its the black hose on top of the chargepipe. It had come loose, so I took a hammer and tapped it back into place and so far it has cured my issues.

Twin Peaks · 12-05-2019, 07:55 AM

Quote:

Originally Posted by jg425

Quote:

Originally Posted by M302_imola

Reverted back to the RC race setting last week and noticed when I floored it I could hear the boost dump into the engine bay making a gush sound. The lack of boost was apparent as far as acceleration. I popped the hood looking for a possible leak but didn't see one. I'll investigate further this weekend. I've replaced the upper charge pipe. Maybe the leak is coming from the lower portion

Anyone experienced this?

I had similar issues as you, I had a leak on the chargepipe. I think its the fuel tank bypass hose, anyway whatever it is, its the black hose on top of the chargepipe. It had come loose, so I took a hammer and tapped it back into place and so far it has cured my issues.

+1 on the charge pipe. I bought a new one on FCP for like $350 2 years ago.

M302_imola · 12-05-2019, 10:40 AM

Quote:

Originally Posted by jg425

I had similar issues as you, I had a leak on the chargepipe. I think its the fuel tank bypass hose, anyway whatever it is, its the black hose on top of the chargepipe. It had come loose, so I took a hammer and tapped it back into place and so far it has cured my issues.

You talking about the silicone hose on the top that fits over the end of the charge pipe? I'll check to make sure my clamps are nice and tight.

Quote:

Originally Posted by Twin Peaks

+1 on the charge pipe. I bought a new one on FCP for like $350 2 years ago.

I replaced the charge pipe with the metal one that Ben sales a few months back.

jg425 · 12-05-2019, 11:31 AM

Quote:

Originally Posted by M302_imola

You talking about the silicone hose on the top that fits over the end of the charge pipe? I'll check to make sure my clamps are nice and tight.

I replaced the charge pipe with the metal one that Ben sales a few months back.

Its the black plug on top of the charge pipe. When I installed the new charge pipe, I assumed that the plug was seated properly. But I began to hear air coming out of the intake and I checked the plug and I was able to pull the plug out without any resistance. I took a small hammer and tapped it into place and I haven't had any issues with hard shifts, the air coming from the intake is gone, and all of my intake codes have gone away. So far so good. This maybe what you need to check into.

M302_imola · 12-06-2019, 10:07 AM

^^^I appreciate the pic. This might just be my prob. I'll check it and report back.

9mmkungfu · 12-06-2019, 11:31 AM

Quote:

Originally Posted by M302_imola

CEL went off before I could have it read.

Historical faults are stored unless cleared. You can read them using ISTA. I would start here.

11-19-2019, 10:16 AM	#1
M302_imola Major 843 Rep 1,497 Posts Drives: '15 X5 35i Xdrive Mineral Whit Join Date: May 2018 Location: Tennessee iTrader: (1)	Violent Shift For the past several weeks I've noticed a more violent shift periodically when getting up to speed on the interstate. If I smash the accelerator on the on ramp the tranny acts normal, but if I'm gradually building speed I can feel a more violent shift around the 60mph mark. Has me a bit worried. Approaching 80K miles and have recently put thought into a tranny fluid drain and fill. You guys think this would help? I will note I've got the RC GTS black w/ app control and I typically leave it in race mode, but I've been running it since June and I'm just now noticing these shifts. Thoughts?
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11-19-2019, 10:23 AM	#2
turboawd Banned 1641 Rep 2,995 Posts Drives: 2015 X5 35i Join Date: May 2015 Location: United States iTrader: (0)	Put your tune in stock mode to see if it still does the hard shift.
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11-20-2019, 10:29 AM	#4
M302_imola Major 843 Rep 1,497 Posts Drives: '15 X5 35i Xdrive Mineral Whit Join Date: May 2018 Location: Tennessee iTrader: (1)	Happened again this morning, but almost felt like a misfire. CEL illuminated so I'll get it read and report back. Note, GTS black was still enabled at the time of the CEL.
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11-20-2019, 11:06 AM	#5
turboawd Banned 1641 Rep 2,995 Posts Drives: 2015 X5 35i Join Date: May 2015 Location: United States iTrader: (0)	You need to read the code. Could be a misfire. Possibly need plugs, especially with a tune you have.
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11-21-2019, 12:28 AM	#6
sj22 Lieutenant 197 Rep 535 Posts Drives: 14 F15 50I Join Date: Nov 2011 Location: Vancouver iTrader: (1)	+1 on plugs. Both RC and even bm3 I recently had worked very smoothly for 1st 10k or so miles, then choppy.
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Violent Shift

11-21-2019, 10:46 AM	#8
alphaod Mmmmm… 1152 Rep 2,426 Posts Drives: F15 Join Date: Oct 2011 Location: New York iTrader: (0) Garage List 2015 BMW X5 xDrive50i [10.00]	I get a hard shift at low RPM sometimes when the engine is cold. __________________ 2015 BMW X5 xDrive50i BMW CCA 509766
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12-04-2019, 10:46 AM	#12
M302_imola Major 843 Rep 1,497 Posts Drives: '15 X5 35i Xdrive Mineral Whit Join Date: May 2018 Location: Tennessee iTrader: (1)	Reverted back to the RC race setting last week and noticed when I floored it I could hear the boost dump into the engine bay making a gush sound. The lack of boost was apparent as far as acceleration. I popped the hood looking for a possible leak but didn't see one. I'll investigate further this weekend. I've replaced the upper charge pipe. Maybe the leak is coming from the lower portion Anyone experienced this?
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12-06-2019, 10:07 AM	#17
M302_imola Major 843 Rep 1,497 Posts Drives: '15 X5 35i Xdrive Mineral Whit Join Date: May 2018 Location: Tennessee iTrader: (1)	^^^I appreciate the pic. This might just be my prob. I'll check it and report back.
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