2016 M3 feels "loose" after differential swap plus hiberation

MBHill · 05-08-2017, 01:47 PM

I bought a 2016 M3 competition pkg last year and when I took it to have the first oil change at 1,200 miles discovered that I had won the rear differential replacement lottery. The replacement was done in November of last year and I immediately stored the car for the winter.

As I drive it now it seems to me that the back ends seems much more "loose" than it did before the replacement. Does that make any sense, can one be related to the other?

mdefalco25 · 05-08-2017, 02:30 PM

I didn't notice a difference at all personally but that's not to say something didn't change on yours.

jschweiger · 05-08-2017, 02:53 PM

I basically did the same thing as you. Received my M3 in July of 2016, had the differential replaced in early late November. Didn't drive my car much in the winter. Though I did drive it every couple of weeks or when weather permitted. Mine seems the same after the replacement.

Just wondering, wan you explain you mean by loose or how it seems different to you?

MBHill · 05-09-2017, 10:02 AM

Todays update.
Had a flat on the way to work 1,950 miles on the tires.
The stock tires with the car - run flat.

Drove it to the dealer.
When they had it up on the hoist they said I needed to replace both rear tires because of wear.
They did not have the tires and had to order them.
They say once they put on the tires if the alignment is out they will go to BMW for comp.
If it isn't out its up to me to deal with Michelin.

boss2k · 05-09-2017, 10:30 AM

Quote:

Originally Posted by MBHill

Todays update.
Had a flat on the way to work 1,950 miles on the tires.
The stock tires with the car - run flat.

Drove it to the dealer.
When they had it up on the hoist they said I needed to replace both rear tires because of wear.
They did not have the tires and had to order them.
They say once they put on the tires if the alignment is out they will go to BMW for comp.
If it isn't out its up to me to deal with Michelin.

Did your car come with run flats as far as i know M's dont come with run flats.

Is BMW replacing them free of charge?

MBHill · 05-09-2017, 11:22 AM

The dealer told me they were and I used that info to drive back to the dealer with them.
Just called them again and they again said they were.
Ask him to go out and confirm and have not heard back yet.

Not clear what BMW is doing.
They said if the alignment was out they would go to BMW corp for me.
Not sure that means they are going to replace for free.
If it wasn't it sounded like I was on my own to deal with Michelin.

Suggestions?

MBHill · 05-09-2017, 11:35 AM

Dealer service guy called me back and YOU are right they were not run flat tires.

G35POPPEDMYCHERRY · 05-09-2017, 11:38 AM

Quote:

Originally Posted by MBHill

Dealer service guy called me back and YOU are right they were not run flat tires.

so u drove flat tires do a dealer? how long? make them pony up some cost. Freckin idiots working at bmw. dont know shit about anything except a 320i

MBHill · 05-09-2017, 12:12 PM

Maybe 15 miles

ZPrime · 05-12-2017, 11:28 PM

That's... not good. I would be screaming at whoever you talked to at the dealer for telling you they are run flats.

OTOH, you couldn't read the tires yourself and figure out what they are??

After you've had the rear diff replaced, you need to effectively drive another "Break-in" period before you romp on it. So if you had it swapped at 1200, you should give it another 1000-1200 and have the diff oil changed yet again. Until going through that, you should be gentle to the rear end...

Lee808 · 05-12-2017, 11:53 PM

Had this issue at Costco when ordering a replacement set. For some reason everytime they pulled up the stock number for the Stock tires (MPSS) it kept coming up as runflat. I had to tell the guy a million times that the OEM MPSS are NOT runflats by any means

MBHill · 05-15-2017, 03:01 PM

Yes, I guess I could have figured it out myself i.e., if they were run flat.
However, I did not think of doing that once BMW told me they were.
At the end of the day BMW agreed to pay for the tires.
The alignment was out when they measured it.

Yes I have to take it back at 2,500 after the differential replacement for a second break in period.
I certainly was not driving faster than the break in period allowed.
I'll be watching the tires closely now to see if this starts to happen again.

05-08-2017, 01:47 PM	#1
MBHill New Member 1 Rep 6 Posts Drives: 2016 m3 Join Date: May 2017 Location: rochester, NY iTrader: (0)	2016 M3 feels "loose" after differential swap plus hiberation I bought a 2016 M3 competition pkg last year and when I took it to have the first oil change at 1,200 miles discovered that I had won the rear differential replacement lottery. The replacement was done in November of last year and I immediately stored the car for the winter. As I drive it now it seems to me that the back ends seems much more "loose" than it did before the replacement. Does that make any sense, can one be related to the other?
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05-08-2017, 02:30 PM	#2
mdefalco25 Captain 197 Rep 710 Posts Drives: 03 E46 M3 Join Date: Nov 2012 Location: Normal, IL iTrader: (3)	I didn't notice a difference at all personally but that's not to say something didn't change on yours.
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05-08-2017, 02:53 PM	#3
jschweiger Private First Class 84 Rep 154 Posts Drives: 2016 SO M3 Join Date: Feb 2016 Location: Sterling, VA iTrader: (0)	I basically did the same thing as you. Received my M3 in July of 2016, had the differential replaced in early late November. Didn't drive my car much in the winter. Though I did drive it every couple of weeks or when weather permitted. Mine seems the same after the replacement. Just wondering, wan you explain you mean by loose or how it seems different to you?
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05-09-2017, 10:02 AM	#4
MBHill New Member 1 Rep 6 Posts Drives: 2016 m3 Join Date: May 2017 Location: rochester, NY iTrader: (0)	Todays update. Had a flat on the way to work 1,950 miles on the tires. The stock tires with the car - run flat. Drove it to the dealer. When they had it up on the hoist they said I needed to replace both rear tires because of wear. They did not have the tires and had to order them. They say once they put on the tires if the alignment is out they will go to BMW for comp. If it isn't out its up to me to deal with Michelin.
	Appreciate 0 Quote

05-09-2017, 11:22 AM	#6
MBHill New Member 1 Rep 6 Posts Drives: 2016 m3 Join Date: May 2017 Location: rochester, NY iTrader: (0)	The dealer told me they were and I used that info to drive back to the dealer with them. Just called them again and they again said they were. Ask him to go out and confirm and have not heard back yet. Not clear what BMW is doing. They said if the alignment was out they would go to BMW corp for me. Not sure that means they are going to replace for free. If it wasn't it sounded like I was on my own to deal with Michelin. Suggestions?
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05-09-2017, 11:35 AM	#7
MBHill New Member 1 Rep 6 Posts Drives: 2016 m3 Join Date: May 2017 Location: rochester, NY iTrader: (0)	Dealer service guy called me back and YOU are right they were not run flat tires.
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05-09-2017, 12:12 PM	#9
MBHill New Member 1 Rep 6 Posts Drives: 2016 m3 Join Date: May 2017 Location: rochester, NY iTrader: (0)	Maybe 15 miles
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05-12-2017, 11:28 PM	#10
ZPrime I INDIC8 612 Rep 1,286 Posts Drives: 2018 LBB M2, 6MT Join Date: Dec 2016 Location: Cleveland, OH iTrader: (0) Garage List 2018 BMW M2 [9.50]	That's... not good. I would be screaming at whoever you talked to at the dealer for telling you they are run flats. OTOH, you couldn't read the tires yourself and figure out what they are?? After you've had the rear diff replaced, you need to effectively drive another "Break-in" period before you romp on it. So if you had it swapped at 1200, you should give it another 1000-1200 and have the diff oil changed yet again. Until going through that, you should be gentle to the rear end... __________________ 2004 Matrix XRS 6MT => 2008 VW R32 DSG => 2012 Audi TTRS 6MT => 2018 BMW ///M2 6MT I'm an IT guy by trade and tech nerd by choice. I like HPDEs, parts of US Hwy 129, NC 28, and the Cherohala Skyway. I'm also a fan of aural pleasure.
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05-12-2017, 11:53 PM	#11
Lee808 Out in the middle of the sea 231 Rep 471 Posts Drives: 2015 M4 Join Date: Jun 2016 Location: Ewa Beach, Hawaii iTrader: (0)	Had this issue at Costco when ordering a replacement set. For some reason everytime they pulled up the stock number for the Stock tires (MPSS) it kept coming up as runflat. I had to tell the guy a million times that the OEM MPSS are NOT runflats by any means
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05-15-2017, 03:01 PM	#12
MBHill New Member 1 Rep 6 Posts Drives: 2016 m3 Join Date: May 2017 Location: rochester, NY iTrader: (0)	Yes, I guess I could have figured it out myself i.e., if they were run flat. However, I did not think of doing that once BMW told me they were. At the end of the day BMW agreed to pay for the tires. The alignment was out when they measured it. Yes I have to take it back at 2,500 after the differential replacement for a second break in period. I certainly was not driving faster than the break in period allowed. I'll be watching the tires closely now to see if this starts to happen again.
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