08-19-2021, 03:17 PM | #1 |
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I was accelerating from 20 mph and then I heard a big BANG!!! Not sure if the rear differential went, but I'm stranded on Laskin Rd, in Virginia Beach. I'm on vacation and I am 4.5 hours from home—Silver Spring, MD. This is not an ideal situation.
Being towed to https://bmw.checkeredflag.com/ Checkered Flag BMW. Does anyone know anything good or bad about this dealer? Is there another place better in this area? Is there a top tier BMW independent? Chime in if you have suggestions. I'll let you know how things turn out. I replaced rear diff fluid just before 50k miles and the car now has 92k miles.
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08-20-2021, 09:47 AM | #2 |
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im sorry to hear that
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08-21-2021, 08:29 AM | #3 |
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So far it seems I've snapped the driveshaft just before it connects to rear diff, rear diff support, rear diff support bolt. This likely happened due to the rear differential failure/lockup. I'll do a bit more digging.
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08-21-2021, 08:33 AM | #4 |
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Pics get to 3% then stop. I have full signal (all bars) on mobile?
Update: I had to add the pics one-by-one
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08-21-2021, 11:02 AM | #5 |
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You likely broke the diff mount and sheared the bolt, which then snapped the driveline.
I’m betting your diff is fine. Make sure they check the axles too - as they’re commonly a casualty after the diff mount failure. Excellent post for those who are making power and still running the stock diff mount. If and when it fails, it takes the driveline and axles with it. While not low cost, a billet unit pays for itself. |
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08-21-2021, 03:25 PM | #6 | |
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Quote:
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08-21-2021, 04:44 PM | #7 |
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Of course. GAW and RK both make billet options. They’re in the realm of $1500 per unit. RK often has sales as well. GAW had a group buy on FB for $1350, might be one spot left! See first link. Good luck.
https://f10.m5post.com/forums/showthread.php?t=1826234 https://www.rkautowerks.com/index.ph...et-diff-mount/ |
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08-22-2021, 03:52 PM | #8 |
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Billet Diff Mount Options for F10 M5
Yes, I am now looking into the best current price or group buy for diff mount. Thanks for the info and providing links as well
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10-02-2021, 08:51 AM | #10 |
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Update on the BANG!
The diff’s internals are shot (metal pieces in diff fluid) diff support and fasteners are shot, drive shaft is broken along with the connecting universal joint-like connection to the diff. Thank God—the axles are fine.
Parts began arriving already and all parts should arrive by late next week. I just installed new plugs and coils and was going to install DPs too. I’ve decided to have the shop install the downpipes while at this shop since they are already dropping the exhaust system and are only charging me ~$300. That’s totally worth it for me as I am extremely busy with work and have been planning/getting things ready for a getaway for my 25th wedding anniversary (Oct 5). I expect things to die down a bit and have the car back on the road by mid October. Reach out if you are in the DMV and want to take a fall cruise!!! Aries’ shop is doing the work and is 2 for 2 in getting the repairs covered by my warranty company AFTER BEING TURNED DOWN originally by another indi shop and Checked Flag BMW in VA Beach… Prestige Automotive Solutions
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10-02-2021, 06:50 PM | #12 |
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Ooooof, hits ya in the feels to hear that about these car but glad to hear you have a good shop advocating for you with the warranty.
Happy 25th to you and yours. I just crossed 23 years in September. What kind of adventure are you planning? I am thinking about that 25 year celebration now and could use some ideas.
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10-04-2021, 09:04 PM | #13 | |
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10-04-2021, 11:31 PM | #14 |
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After I read it I started looking for a group buy or sale. I won't be driving mine for about a month and half due to work and am hoping to catch a black friday/cyber monday sale. If I was driving on the regular though it would be a top priority for me. I haven't tuned it yet but the mods are on the horizon and have been worried about this rear diff issue.
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10-06-2021, 05:32 AM | #15 |
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TinCanSailor: Spending several days at the Greenbrier in WV for my anniversary. They have a multitude of activities.
Chris_Mauck: I’m running a Stage 1 by Tuning Tech by Frank Smith (TTFS). Here’s my tuning experience at TTFS. Dyno Details: All dyno pulls were in fourth gear and the values are at the wheels HP/TRQ FT.LBS.
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10-06-2021, 12:20 PM | #16 | |
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10-06-2021, 03:18 PM | #17 |
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Fantastic. That is good to know. Definitely one of my most trusted vendors/advisors.
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10-06-2021, 06:49 PM | #18 |
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Having dealt with an engine that has eaten itself; I am not going to leave anything else to chance. I reached out to the folks at RKautowerks and was able to get better pricing than on the web.
I have no mods other than RKautowerks CF air intakes for now, which look and sound phenomenal, and I won't see my car for another 45 days but I am going to install this Diff Brace as soon as I do. I have done business with them in the past and met the team in person and they are genuinely passionate about engineering and service. I can't wait to get home and see this beautiful hunk of aluminum in person.
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10-06-2021, 09:57 PM | #19 | |
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10-13-2021, 02:47 AM | #20 |
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Yesterday my vehicle was pushed into the shop and the work has begun to get everything back into working order. Upon arrival they had already:
Shop: Prestige Automotive Solutions 7511 Rickenbacker Dr, Gaithersburg, MD 20879 Phone: (301) 977-9700
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10-13-2021, 04:59 AM | #21 |
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Sorry to read about your troubles. Sure the car will be awesome when all is done. Since installing my GAW diff bracket I’m hearing diff backlash and diff whine. Im looking into having the diff refurbished (bearings etc) here in South Africa. Curious to know whether refurbishment is an option in the US as I haven’t read anything about it. If not, is there a reason for this
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10-14-2021, 02:02 AM | #22 | |
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Used differential
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I asked for upgraded bushings for my new billet diff mount and was advised strongly not to do so. From their experience, gear noise from the diff would become almost intolerable for most of their clients. I hope this helps point you in a direction to help resolve the noise you are now hearing and there’s no need for your diff to be refurbished or replaced. GOOD LUCK ajm55! By the way, in the US, I found used differentials going for $675-$1,100.
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