01-06-2024, 10:57 AM | #1 |
I don't want to know the Price of Gas
220
Rep 181
Posts
Drives: 2023 X3 MC
Join Date: May 2022
Location: Sykesville, MD
|
Rear Diff Bolt Movement Video
Featured on BIMMERPOST.com This is me going up and down my drive way. House is higher than the surface street so there is a decline. The bolt moves up (diff moving down) when the car reverses, and down (diff moving up) when going forward. I didn't notice the defined *CLUNK* I was hear the previous day, but this was recorded after the car sitting my my garage from around 6pm yesterday until around 9am today. I'm thinking things might be tighter because the body is cold (Cold expands, Heat shrinks) PS: Another thing I'm realizing, I'm barely hitting the gas to move the car. If it moving this much with like 10% throttle input in Comfort mode....how hard is this thing slapping around in Sport w/ 80% throttle from a stop.... Diff Recording |
01-06-2024, 01:08 PM | #2 |
Private First Class
229
Rep 123
Posts |
This is great! Thank you for doing that. I have no idea what should be normal, honestly. If that happened under the most extreme conditions, I would say it is normal. But that’s not the case now is it hahaha.
Then you have someone like BrockDM with a 9sec car still on the stock bushing with no issues. |
Appreciate
0
|
01-06-2024, 01:45 PM | #3 |
First Lieutenant
477
Rep 359
Posts |
Seems like some play is normal with this type of bushing? this video shows a f10 comparing a cracked bushing compared to a new one (new one starts at 1:44).
I’m not an expert by any means but if bmw designed this to allow some play, would the solid bushing solution that’s been discussed possibly cause any issues down the line? |
Appreciate
1
R0ot.Us3r219.50 |
01-06-2024, 02:37 PM | #4 |
I don't want to know the Price of Gas
220
Rep 181
Posts
Drives: 2023 X3 MC
Join Date: May 2022
Location: Sykesville, MD
|
Yeah the difference in movement between the old and new IMO was negligible. Part of me wants to say "They're engineers, they know what their doing" but the other part of me just doesn't like it.
Does anyone know if the rear bushing on our vehicle are the same as the ones on the i30 X3s? I want to believe they would have beefed ours up, but I'm thinking its the same part... I have a dog-bone bushing insert on my MK7 VW GTI, and outside of additional vibration felt when reversing, there has been no ill effect on the car and I've had it from new since '17. Is it a 503hp AWD heavy'ish SUV – no, but thats still a key bushing to control X-axis rotation on the motor. |
Appreciate
1
Kevin_The_Clean13124.00 |
01-06-2024, 05:38 PM | #5 |
Second Lieutenant
293
Rep 272
Posts
Drives: 2014 STI - 2020 X3MC
Join Date: Dec 2022
Location: Chicago area
|
Bad ass video, really good view of the flex for sure.
This might be hard to explain or sounds stupid, but for bushings I look at it like this, each bushing is a fuse of some sort. The question in my mind is always, what does putting a stronger fuse in do, and how catastrophic is this fuse when it blows? It moves the fuse failure point somewhere else. Problem with this bushing, is that when it fails, it's pretty spectacular in a bad way. :-| |
Appreciate
2
R0ot.Us3r219.50 Kevin_The_Clean13124.00 |
01-07-2024, 10:10 AM | #6 |
I don't want to know the Price of Gas
220
Rep 181
Posts
Drives: 2023 X3 MC
Join Date: May 2022
Location: Sykesville, MD
|
I found this and i think this might actually be my issue
https://youtu.be/910gFEI4Bb8?si=q7TR3jtCMeTovs1y Can you do the transfer case calibration with ProTool? |
Appreciate
0
|
01-09-2024, 08:53 AM | #7 | |
Captain
2036
Rep 997
Posts |
Quote:
__________________
|
|
Appreciate
2
Kevin_The_Clean13124.00 Bimma360228.50 |
01-09-2024, 09:28 AM | #8 | |
I don't want to know the Price of Gas
220
Rep 181
Posts
Drives: 2023 X3 MC
Join Date: May 2022
Location: Sykesville, MD
|
Quote:
|
|
Appreciate
0
|
01-09-2024, 10:42 AM | #9 | |
Captain
2036
Rep 997
Posts |
Quote:
Bolt https://belmetric.com/hex-bolts-10-9...H14X1.5X40FYLW Nut https://belmetric.com/steel-class-10...n-flange-nut/? Washer https://belmetric.com/hv-200-steel-h...=WFEHV14X44YLW[/QUOTE]
__________________
|
|
01-09-2024, 11:04 AM | #10 |
I don't want to know the Price of Gas
220
Rep 181
Posts
Drives: 2023 X3 MC
Join Date: May 2022
Location: Sykesville, MD
|
I have this already, awesome. So lift the rear, support the diff, remove and replace the bolt washer and nut.
Much easier than replacing the bushing and I’ll def feel better |
Appreciate
0
|
01-10-2024, 07:41 PM | #11 | |
Brigadier General
3124
Rep 3,803
Posts |
Quote:
__________________
1998 E36 M3 - Totaled
2003 E39 M5 - Gone but not forgotten 2011 E90 335i M-Sport - Daily Driver 2017 F87 M2 - Sold & missed 2020 F97 X3 M Competition - Finally arrived /// |
|
Appreciate
1
Jnat378.00 |
01-12-2024, 09:37 AM | #12 | |
Private First Class
229
Rep 123
Posts |
Quote:
I didn't know about the VTT kit until you mentioned it. I just looked it up, and it looks great! I really like this idea. I wish they had more pictures or install instructions, as I want to wrap my head at how it it is NVH friendly. It looks to be a solid mount solution, in the sense that it does not allow any play in the diff. I haven't done a diff lockdown before on any of my cars so I am not familiar with the concept first hand. |
|
Appreciate
1
ThirstyX3M99.00 |
01-15-2024, 02:28 PM | #13 | |
Captain
2036
Rep 997
Posts |
Quote:
My thought process was since all 3 differential bushings remain rubber, there shouldn't be any added noise. Vibration I'm not sure of...
__________________
|
|
Appreciate
0
|
Post Reply |
Bookmarks |
Thread Tools | Search this Thread |
|
|