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MFactory LSD Review

23648 Views 43 Replies 22 Participants Last post by  Aquafina
So here is my little review of the MFactory D Series (40mm) LSD.

This is the prototype unit that I inspected and am currently running in my 96 hatchback. Trans is a EX D16Z6 trans I rebuilt a couple months ago as a backup and decided to use for the testing.

Appearance of the diff is great, no visual defects.

Bearing hubs measured out at 40.00mm each. On an OBX I have (new) they measured 40.01mm and 40.02mm.

Runout on the MFactory LSD is .0005". On the OBX it is .005" (ok, but more than I like, and disappointing as OBX checked it before shipping it to me as it is a replacement for the OBX I had with .023" runout).

Ring gear bolts go in fine with no clearance issues, and no issues with a strandard 6 point deep socket clearing the housing.

Internals are clean of burrs and amazingly close in weight (1g). Everything was installed correctly and the case bolts were torqued correctly. Clearances are tight as is per usual with MFactory.

Some steps were taken to remove unneeded weight. Awaiting arrival of a new scale so I can weigh the OBX and Quaife without disassembling them. Total weight of the MFactory LSD is 4,766g, or 10.507 pounds. I'm having MFactory look into taking another step on the production units to save even more weight.

Install was uneventful. Speedo gear slid on fine, bearings pressed on fine, diff shim clearance was in spec. Axles even slid in and out just like stock.

Driving the car now is totally different. Noise free operation, and it works as an LSD should. I can turn in earlier and not understeer as with an open diff. Late turn ins, the car goes where I want it to. Just point and gas and the car remains neutral versus having to lift to get it to oversteer to overcome the understeer. I beat the crap out of it. Pounding it over "gators" as you would on track, putting one wheel off, 7,200 RPM clutch dumps, wheel hopping, everything.

To sum it up, this is as good as it gets for a D Series helical LSD IMO.

No 35mm D15 Quaife in these pics, still haven't even opened the box the replacement came in.

MFactory vs OBX

MFactory vs OBX 2

MFactory case removed

MFactory disassembled
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1 - 20 of 44 Posts
Very nice. I don't know what else to say. I guess I'm jealous. One day I hope to have this LSD in my day. Nice review. Keep us updated.
god dammit more shit to add to the list. im glad this lsd worked out
Well, when the production units come in, let me know. If you're happy with it, I'm in.
It is about frickin' time. =)

Will you also sell the hand on a stick? That thing is better than the LSD.
from what ive heard you can order them from aquafina now.... tho he must confirm such great news.
Expecting my first shipment of LSD's late next month. Only way to get one is through me as I am the exclusive dealer for them.

The hand is not for sale, its my strong hand.
Was one of those bolt's threads messed up on the end or just the pic? Once I get my used Quaife I'll do a similar thread myself.

Good work!
Bought time I have been waiting this has been on my parts list for some time and one of these will be on the rex thanks to the folks at Mfactory and Aquafina for the D series love. Now lets hope they sell to offset all the money spent on R&D.

I know the last Quaife I install which also has the axle tubes in spec, just warm the diff bearings and press them on by hand. Make sure tp let them cool or they fall off when you flip the unit over.

Nice to know the MF unit will be just as easy to work with.
Bolts not messed up. Just residual thread lock after dying the bolt.
The hand is not for sale, its my strong hand.
That is so not cool. Dif, schmiff! I want a strong hand. :p
These do look like a nice piece...I'd have one if it wasn't for the fact its cheaper for me to get a Quaife one!
I believe $650 is around the right price but Aqua will have to confirm.
Can't discuss pricing until I'm a sponsor.
Our MSRP (as shown on the website) is $649.95 + $30 Shipping within the US.

I believe Aquafina will be doing a limited special offer though once he is granted sponsorship status here. Alternatively, you can PM him in the meantime :)
all i can say is i am tired of swapping trannys at the track. once is enough. heh

i cant wait to launch at 6k without a hop skip or SMASH! hahahah

today is the day i start saving. woot
1 - 20 of 44 Posts
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