LSD arrived, work underway

DietTab · 10-28-2014, 06:18 PM

When I saw the package, I was a little shocked at first because I'm used to working on large domestic diffs, and something this size seems... fragile.

It's an M Factory helical unit, which I got on a 20% off sale... couldn't pass up the price. It appears to be well made, with high quality FKE 12.9 fasteners (taiwan). Machine work and final finish is very nice.

Anyway, got the old diff out, and will open it up and install this tomorrow, since I spent all my strength and willpower getting off the stupid driveshaft nut today (not fun).

Last autox of the season is this weekend, so have to make sure I'm ready.

Dackelone · 10-28-2014, 06:56 PM

Very cool! Looking forward to hearing your thoughts after the install.

ShocknAwe · 10-28-2014, 07:01 PM

No kidding. Nice looking piece and I agree, expected it to look more robust. Keep us updated!

lastMleft · 10-28-2014, 07:22 PM

Looking forward to a review.

DietTab · 10-29-2014, 09:19 PM

First rearend assembly for my helper.

DietTab · 10-30-2014, 12:02 AM

Final backlash is .004-.008 depending on point on gear measured, indicating either the gear (most likely) or lsd isn't perfectly round. I'm satisfied that is is not too tight, however, and that's the important thing. Don't get too hung up on this if you're doing it yourself - the pinion is fixed since we haven't touched it. As long as the gear pattern is good, you arent going to hurt anything.

DietTab · 10-30-2014, 12:54 AM

Pattern looks good here, all set for reinstall tomorrow.

DietTab · 10-30-2014, 08:49 PM

Wow, it's like driving an entirely different car... especially around tight corners on the throttle and from a stop. No more e-diff intervention, amazing. Cant wait for saturday's autox.

It's also silent, so I must have set it up right. Winning.

3002 tii · 10-30-2014, 09:29 PM

Did you have the 50mm wrench?

DietTab · 10-30-2014, 10:10 PM

Quote:

Originally Posted by 3002 tii

Did you have the 50mm wrench?

Used an atv axle nut wrench. Total cost, $12, and forged steel. No overpriced 'bmw tool' crap.

Ginger_Extract · 10-30-2014, 10:50 PM

I wish MFactory would be put out comparable specs on their diff so I can figure how it stacks up against alternative options. I ALSO want to hear more of your opinions on the performance, so get to driving!

3002 tii · 10-31-2014, 08:53 AM

Quote:

Originally Posted by DietTab

Used an atv axle nut wrench. Total cost, $12, and forged steel. No overpriced 'bmw tool' crap.

Plan to do the same, bought mine for $7 off ebay. Just hope MFactory sends my diff soon, month delayed so far.

DietTab · 11-02-2014, 02:42 PM

It's definitely a night and day difference vs not having the LSD. We finished 12th/13th (me and codriver) out of 60+ today. Would have placed in the top10, but borked my 2 good runs on cones. Have to re-learn how to drive the car, it's that different. I will say it's significantly faster, especially on corner exits and tight turns. Very highly recommend.

lastMleft · 11-02-2014, 07:02 PM

Quote:

Originally Posted by DietTab

It's definitely a night and day difference vs not having the LSD. We finished 12th/13th (me and codriver) out of 60+ today. Would have placed in the top10, but borked my 2 good runs on cones. Have to re-learn how to drive the car, it's that different. I will say it's significantly faster, especially on corner exits and tight turns. Very highly recommend.

Wow major difference hu, if you don't mind me asking what was the total cost for the LSD? and was it simple to install?

fcman · 11-03-2014, 10:12 AM

What class you run in autox?

DietTab · 11-03-2014, 12:59 PM

We run in ASP. The car's pretty well sorted at this point, just undersprung with the 135 swift spec-r kit. I might step up to a full coilover next year so I can run the spring rates I need to compete with the top guys. Might also just give the M3 front spec-r springs a go, since they're 275 lb/in instead of 201 of the 135 kit.

chris82 · 11-04-2014, 04:22 PM

Quote:

Originally Posted by DietTab

Final backlash is .004-.008 depending on point on gear measured, indicating either the gear (most likely) or lsd isn't perfectly round. I'm satisfied that is is not too tight, however, and that's the important thing. Don't get too hung up on this if you're doing it yourself - the pinion is fixed since we haven't touched it. As long as the gear pattern is good, you arent going to hurt anything.

Sorry, can you explain this backlash?

DietTab · 11-04-2014, 05:27 PM

Quote:

Originally Posted by Chrisar82

Sorry, can you explain this backlash?

In a rough sense, its the distance/free space between the ring gear and the pinion gear measured at the driven gear tip. Its adjusted by the pinion crush sleeve on the pinion, and less directly by the bearing c-clip sizes on the ring gear which do effect it, but have a greater effect on the gear pattern.

katsooba · 11-05-2014, 05:36 PM

cant wait to hear more of your opinion of this LSD.
definitely on my to-buy list!

ShocknAwe · 11-07-2014, 08:31 AM

Awesome, more and more good things about these units. Glad the install went so well.

BMWX1-35i · 01-18-2015, 12:31 AM

I know this thread is a bit old but, I installed my LSD from MFactory. Wonderful place to work with and very good support. Helped me out in a big way when one of my bearing fell apart on dis-assembly. Had the new one's the next week! Unreal deference from that crappy EDiff. Great quality and the unit bolted right in...

10-28-2014, 06:18 PM	#1
DietTab First Lieutenant 12 Rep 324 Posts Drives: 08 135i Join Date: May 2014 Location: Manhattan, KS iTrader: (2)	LSD arrived, work underway When I saw the package, I was a little shocked at first because I'm used to working on large domestic diffs, and something this size seems... fragile. It's an M Factory helical unit, which I got on a 20% off sale... couldn't pass up the price. It appears to be well made, with high quality FKE 12.9 fasteners (taiwan). Machine work and final finish is very nice. Anyway, got the old diff out, and will open it up and install this tomorrow, since I spent all my strength and willpower getting off the stupid driveshaft nut today (not fun). Last autox of the season is this weekend, so have to make sure I'm ready. __________________ LSXOCET - 404rwhp @ 1600 lbs curb weight... bonkers fast
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10-28-2014, 06:56 PM	#2
Dackelone European Editor 10539 Rep 22,992 Posts Drives: N54 e82 Join Date: Feb 2010 Location: Bayern, Germany iTrader: (1)	Very cool! Looking forward to hearing your thoughts after the install. __________________ Dackel's European Delivery Museum Guide
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10-28-2014, 07:01 PM	#3
ShocknAwe 1Addict 3233 Rep 7,894 Posts Drives: E82 Mutt, M57 Truck Join Date: Jul 2012 Location: Charleston iTrader: (22)	No kidding. Nice looking piece and I agree, expected it to look more robust. Keep us updated! __________________ 2010 135i 6MT Jet Black N54/3 FE82 Mutt \| BUILD THREAD \| GARAGE SALE
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10-28-2014, 07:22 PM	#4
lastMleft Major 30 Rep 1,364 Posts Drives: e92 M3 Join Date: Aug 2010 Location: Portland iTrader: (0)	Looking forward to a review.
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10-29-2014, 09:19 PM	#5
DietTab First Lieutenant 12 Rep 324 Posts Drives: 08 135i Join Date: May 2014 Location: Manhattan, KS iTrader: (2)	First rearend assembly for my helper. __________________ LSXOCET - 404rwhp @ 1600 lbs curb weight... bonkers fast
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10-30-2014, 12:02 AM	#6
DietTab First Lieutenant 12 Rep 324 Posts Drives: 08 135i Join Date: May 2014 Location: Manhattan, KS iTrader: (2)	Final backlash is .004-.008 depending on point on gear measured, indicating either the gear (most likely) or lsd isn't perfectly round. I'm satisfied that is is not too tight, however, and that's the important thing. Don't get too hung up on this if you're doing it yourself - the pinion is fixed since we haven't touched it. As long as the gear pattern is good, you arent going to hurt anything. __________________ LSXOCET - 404rwhp @ 1600 lbs curb weight... bonkers fast Last edited by DietTab; 10-30-2014 at 01:09 AM..
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10-30-2014, 12:54 AM	#7
DietTab First Lieutenant 12 Rep 324 Posts Drives: 08 135i Join Date: May 2014 Location: Manhattan, KS iTrader: (2)	Pattern looks good here, all set for reinstall tomorrow. __________________ LSXOCET - 404rwhp @ 1600 lbs curb weight... bonkers fast
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10-30-2014, 08:49 PM	#8
DietTab First Lieutenant 12 Rep 324 Posts Drives: 08 135i Join Date: May 2014 Location: Manhattan, KS iTrader: (2)	Wow, it's like driving an entirely different car... especially around tight corners on the throttle and from a stop. No more e-diff intervention, amazing. Cant wait for saturday's autox. It's also silent, so I must have set it up right. Winning. __________________ LSXOCET - 404rwhp @ 1600 lbs curb weight... bonkers fast
	Appreciate 0 Quote

10-30-2014, 09:29 PM	#9
3002 tii Lieutenant General 2282 Rep 12,565 Posts Drives: Z4 M, X5, GX460 Join Date: Apr 2008 Location: CT iTrader: (99) Garage List F15 X5 xDrive35i [8.75] E86 Z4 M [10.00] F10 550i (Retired) [9.17] F25 X3 xDrive35i (R ... [9.43] E82 135is (Retired) [9.50] E85 Z4 M (Retired) [9.41] E90 328i xDrive (Re ... [9.25] E86 Z4 3.0si (Retired) [9.24]	Did you have the 50mm wrench? __________________ Follow for latest mods
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10-30-2014, 10:50 PM	#11
Ginger_Extract California-bound 385 Rep 1,480 Posts Drives: BMW 135i Join Date: Jan 2013 Location: Los Angeles, CA iTrader: (3)	I wish MFactory would be put out comparable specs on their diff so I can figure how it stacks up against alternative options. I ALSO want to hear more of your opinions on the performance, so get to driving! __________________ Streets of Willow: 1:27.7 CW 11/15/15; 1:29.5 CCW 8/15/15 \|\|\|\| Autoclub Speedway ROVAL (CCW): 1.52.6 - 12/2/17 Willow Springs - Big Willow (CW): 1:35.8 - 3/31/18 \|\|\|\| Buttonwillow #13 (CW): 1:59.3 1/27/18 https://www.facebook.com/JakeStumphRacing \|\|\|\| http://www.youtube.com/user/RaceMeMZ3
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11-02-2014, 02:42 PM	#13
DietTab First Lieutenant 12 Rep 324 Posts Drives: 08 135i Join Date: May 2014 Location: Manhattan, KS iTrader: (2)	It's definitely a night and day difference vs not having the LSD. We finished 12th/13th (me and codriver) out of 60+ today. Would have placed in the top10, but borked my 2 good runs on cones. Have to re-learn how to drive the car, it's that different. I will say it's significantly faster, especially on corner exits and tight turns. Very highly recommend. __________________ LSXOCET - 404rwhp @ 1600 lbs curb weight... bonkers fast
	Appreciate 0 Quote

11-03-2014, 10:12 AM	#15
fcman Captain 670 Rep 987 Posts Drives: 2023 G87 Join Date: Mar 2014 Location: Atlanta, GA iTrader: (0)	What class you run in autox?
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11-03-2014, 12:59 PM	#16
DietTab First Lieutenant 12 Rep 324 Posts Drives: 08 135i Join Date: May 2014 Location: Manhattan, KS iTrader: (2)	We run in ASP. The car's pretty well sorted at this point, just undersprung with the 135 swift spec-r kit. I might step up to a full coilover next year so I can run the spring rates I need to compete with the top guys. Might also just give the M3 front spec-r springs a go, since they're 275 lb/in instead of 201 of the 135 kit. __________________ LSXOCET - 404rwhp @ 1600 lbs curb weight... bonkers fast
	Appreciate 0 Quote

11-05-2014, 05:36 PM	#19
katsooba First Lieutenant 85 Rep 354 Posts Drives: bmw 135i Join Date: Apr 2012 Location: Israel iTrader: (0)	cant wait to hear more of your opinion of this LSD. definitely on my to-buy list! __________________ 135i N55 / KW V3 / MHD Flash / Tons of grip mods / CP-E charge pipe / CP-E 7" FMIC
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11-07-2014, 08:31 AM	#20
ShocknAwe 1Addict 3233 Rep 7,894 Posts Drives: E82 Mutt, M57 Truck Join Date: Jul 2012 Location: Charleston iTrader: (22)	Awesome, more and more good things about these units. Glad the install went so well. __________________ 2010 135i 6MT Jet Black N54/3 FE82 Mutt \| BUILD THREAD \| GARAGE SALE
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01-18-2015, 12:31 AM	#21
BMWX1-35i 2015 X1 35i XDrive with NAV 76 Rep 659 Posts Drives: 2015 X1 35i Join Date: Aug 2014 Location: East Coast iTrader: (2) Garage List 2015 X1 35i Xdrive [8.00]	I know this thread is a bit old but, I installed my LSD from MFactory. Wonderful place to work with and very good support. Helped me out in a big way when one of my bearing fell apart on dis-assembly. Had the new one's the next week! Unreal deference from that crappy EDiff. Great quality and the unit bolted right in... __________________ 2015 X1 35i XDrive Ultimate, NAV & Cold Weather Package MHD, FTP Motorsports Charge Pipe, Drop in K&N
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