Clutch Type LSD, who has made the switch?
 

I have been doing lots of research about clutch type LSD's and I'm wondering if people here have made the switch and to what brands?

It's not in yet... but it will be an MFactory 1.5/2 way. Getting the plates WPC treated, dropping initial torque in half and putting lock capacity to 83% :D

EDIT: Did you get the Supra diff in yet?

My Supra LSD should be in this week, just need to find some marking compound to set the ring back in, seem to have misplaced mine.

I bought the GM stuff (it's yellow) from Amazon ([ame="http://www.amazon.com/Genuine-Fluid-1052351-Marking-Compound/dp/B00BK7MFC8/ref=sr_1_1?ie=UTF8&qid=1443455911&sr=8-1&keywords=gm+marking+compound"]THIS[/ame]) and a dial in-lb torque wrench to measure pre-load.

Check out the suspension subforum. Many have, but a lot of them don't post on this board. I can probably answer any questions you have.

Just looking for people experiences and opinions.

Im not a track junkie or anything but feel upgrading from the Torsen would benefit me. With my current suspension I find the inside wheel will get light enough to trigger the traction control a little to easily. I could adjust this in the suspension but I really really like it right now so I want to cure this with a clutch type LSD.

Also spinning a wheel when trying to get in a driveway gets old.

I'm going to use traction control activation as something of a test with my new Supra LSD, I find this point can be reached on the street a little more responsibly.

Have OS Giken on my car now.

If you do not like noise, you will not want to go to a true mechanical LSD.

Also, keep in mind that you will need to change the diff oil often. The intervals will be dictated by the driving but expect to change it every 5-10k miles.

-alex

You must have the volume turned up on your Giken because I can't hear mine.

Yeah Gikens (esp in Spec S trim) should be silent. The two that I have owned (only one currently owned) have driven/sounded like open diffs. At least if you're using the OS fluid.

Even the stock Torsen makes noise in certain tight turns, especially in parking lots. Aftermarket clutch-type diffs do the same but with much louder clunks.

That's what I am mostly referring to. Normal driving has no impact unless I dump the clutch or accelerate while turning aggressively.

-alex

Yeah the OSG is silent. It's not like a drifty diff kaaz or whatever.

Are you sure it's actually functioning? :D

Yes, quite.

I am a huge OSG cheerleader.

They work when you want them to and aren't obtrusive otherwise.

I took my Supra LSD for the first ride tonight and holy braking stability! I'm a fan of late and trail braking but the car was not, now it's planted as can be. It reminds me of my M3 with the big rear tires.

As for noise I got a click or two pulling out of my garage but never again, even doing tight slow turns. I look forward to getting more time on it.

I love my Cusco LSD. Much more predictable (and faster) than the Torsen once you trust it :)

MFactory Mechanical LSD and 4.88 FD installed
 

Finally got the MFactory 1.5/2 way installed with a 4.88 Weir Performance final drive. It's amazeballs. Only have about 1300 miles on it so far and my tires suck, so the chattering is a bit high when it's cold. But after a short drive when it warms up there is no chattering at all and overall very little gear noise (I have solid mounts everywhere, so gear whine and tranny noise is expected).

This is my first ever mechanical LSD and jebus this thing make the car STICK! I'm running 1/2 the amount of preload (6 springs, instead of 12) and have the lock capacity % at about 40%. These values might change a bit when I actually get some track wheels/tires next season, but for now it feels wonderful. Locks when I'm harder on the gas, and if I'm feathering the gas it'll slip, then off the gas while in gear going into corner the back end just hugs the inside.

This winter will be my first full winter with it installed, but I'm looking forward to the predictability of the ass end on snow tires.

Now for the pictures! I'm not very good at pics, but I did take it apart a few times since installing it to check the gear contact patch and clutch pad wear.

I haven't been getting on here that much anymore, but thought I'd share my experiences since that's what the community is all about!

https://s17.postimg.org/ux3r7gibv/IMAG2491.jpg

https://s17.postimg.org/dl3em0ouj/IMAG2492.jpg

https://s17.postimg.org/d9ly998ej/IMAG2493.jpg

https://s17.postimg.org/fs7n9xu4r/IMAG2494.jpg

https://s17.postimg.org/dc5tw3c23/IMAG2495.jpg

https://s17.postimg.org/udyny6qx7/IMAG2496.jpg

https://s17.postimg.org/mmhxzmmrv/IMAG2497.jpg

https://s17.postimg.org/4kyt1tsqz/IMAG2498.jpg

https://s17.postimg.org/pw0yju097/IMAG2499.jpg

https://s17.postimg.org/xda5z1psb/IMAG2500.jpg

https://s17.postimg.org/bs53bft1n/IMAG2501.jpg

https://s17.postimg.org/rrnquzp3f/IMAG2538.jpg

https://s17.postimg.org/uzs881bd7/IMAG2539.jpg

https://s17.postimg.org/r4ou5gs7f/IMAG2540.jpg

https://s17.postimg.org/bkhgexi2z/IMAG2541.jpg

https://s17.postimg.org/a6ptjmitn/IMAG2542.jpg

https://s17.postimg.org/z19bdp3nv/IMAG2543.jpg

I appreciate the update. I just ordered an OS Giken 1.5-way LSD from CounterSpace Garage, and it's being drop shipped to Weir Performance so that Spence Weir can install the LSD and 4.56:1 ring and pinion gear. Why did you choose the 4.88:1 over the 4.56:1 gear set? Can you live with the ratio on a dialy driver or are the revs just crazy high, especially on the highway? I assume you're normally aspirated (nobody that's blown would want such a short ratio) and acceleration is much improved, but our gearboxes are a little clunky and shifting quickly and more frequently might be a pain - has this been an issue for you? I'm asking because I'm second guessing the ratio of my choice and I'd like to hear more about your experience with the ratio you chose to go with.

I know that this resurrected thread is about clutch-type LSDs, but I think people will be interested in hearing more about your super-short final drive, too.

OS Giken will be sweet! Far quieter than any other on the market. :)

I was a bit hesitant about the 4.88 when I ordered it, but I couldn't be happier. I do daily drive the car and it's not bad IMO. Highway driving I'm at about 3900 at 75mph and 4100 at 80mph. That'll get more annoying when I drive to the track, but the highways in the city are 65 so it's just fine, it's also nice to have a little oomph in 6th on the freeway. The gearing wasn't as short as I had envisioned in my head and with the LSD the grip is fantastic. Overall I'm glad that I went with the 4.88 and once the exhaust gets finished and the torque dip dies down, it's going to be even more fun and torquey. Even as it is, you go through the RPM's so quick in the low RPM that the torque dip isn't as noticeable. I also have a 13lb flywheel though too.

The car has close to 30,000 at this point and the gear box is great. It has just gotten smoother over time. When it was low on miles it liked being shifted quickly and with assertion, now it's a little more lax. I tend to shift quicker anyway though with the lighter flywheel because the RPM's drop so quickly with the clutch engaged. With the 4.88 and the flywheel it feels a bit more evened out, RPM's rev quick high and low. I will put a short shifter on it eventually though, it's on the list, just low priority.

Need grippier tires on rpf1's and new pads/rotors for track/mountain days! Let me know if you have any other questions.

Couldn't find a good video on youtube (I can record a quick one if you want), but I can tell that the revs aren't as crazy fast as you might think.

Thanks @fika84 for answering all my questions - your car sounds like it's a blast!