| 02-14-2017, 01:59 AM | #23 |
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Halfshafts, drivelines and diff cases...I wonder what's next after this!
http://f10.m5post.com/forums/showthread.php?t=1291580
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| 02-14-2017, 07:30 AM | #24 | |
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| 02-14-2017, 08:03 PM | #25 |
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F10 1/4 WR: 9.9s / 142.5mph 1/2 WR: 175.5mph
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So I bought a 2nd mount and will get it scanned and look into a billet option. This with heat-treated or better bolts should do the trick.
Hope to keep this under $750 - which is a reasonable price since fixing it along with a new driveshaft etc. will cost more! Just replacing the mount is a relatively low labor content |
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| 02-15-2017, 09:08 PM | #26 |
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Well I'm glad at least you found the next weak point... for now
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| 02-16-2017, 12:02 PM | #28 | |
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| 02-16-2017, 03:13 PM | #29 | |
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| 02-16-2017, 06:07 PM | #30 | |
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| 02-17-2017, 09:02 AM | #31 | |
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F10 1/4 WR: 9.9s / 142.5mph 1/2 WR: 175.5mph
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| 02-17-2017, 10:17 AM | #32 | |
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With the potential power of the 4.4 liter BMW engine, I wonder how long it will be before someone uses a more bullet proof rear end? The change would take away the sophistication of the stock diff for road course use, but if that isn't important it seems like a safer way to go. And you could change the rear brake so the use of actual mainstream slicks would give you some traction. Wheelie bars next? |
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| 02-18-2017, 09:22 AM | #34 | |
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Or, is there a simple way to fool the ECU into thinking its control signals to the differential are being followed by some electronic trickery? Much easier than designing a standalone ECU I'd think. I wonder if the engine tuning shops have any knowledge of those functions? |
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| 02-22-2017, 06:34 PM | #35 |
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F10 1/4 WR: 9.9s / 142.5mph 1/2 WR: 175.5mph
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Update:
The breakage points were: 1. Bolts holding the diff to the bracket 2. Bracket itself 3. Driveshaft CV joint (see pic) Unsure of the sequence, but I am quite sure it is #1-#3 in that order. I inspected the bolts and they are just standard bolts that are used on suspension components with the only exception of having some sort of Loctite pre-applied (supposedly seals once screwed in) |
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| 02-23-2017, 11:30 AM | #36 |
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That's crazy. Reminds me of my old e46 M3 days with the bolts that would back out of the diff . They changed the bolts near the end of the models life, but did not mention it. I wonder if those bolts have a new part number indicating BMW is aware of this failure point on the f10 M5 as well?
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| 02-23-2017, 04:48 PM | #37 |
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Funny you mention that, the previous owner of my X5M said he had that issue with the diff bolts backing out. It's something I'll be checking when I roll over 100k and have the diff and transfer case fluids replaced. As for the bolt changing part numbers over the years, I bet that can be researched via www.realoem.com since it shows applicability, revision dates, etc.
Last edited by m5james; 02-24-2017 at 12:35 AM.. |
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| 02-23-2017, 06:29 PM | #38 |
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F10 1/4 WR: 9.9s / 142.5mph 1/2 WR: 175.5mph
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Here is something that cropped up - made by some of the East Coast shops I believe.
Looks interesting. |
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| 02-23-2017, 07:01 PM | #39 |
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That's serious right there. Kind of like the old e36 bars guys made for boosted M3's way back in the day. Also has a kind of Mason engineering vibe to it as well. You going to try it out?
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| 02-24-2017, 06:22 PM | #41 | |
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F10 1/4 WR: 9.9s / 142.5mph 1/2 WR: 175.5mph
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| 02-28-2017, 03:45 PM | #42 |
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Raza,
I'd be interested if you make billet diff front and rear brackets. I was going to do something soon. I have spare brackets sitting here that I was planning to use as templates for my own billet parts.
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| 03-15-2017, 06:20 PM | #43 | |
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| 03-15-2017, 06:22 PM | #44 |
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