GTUs Rear End ok for Drifting?
 

Ive done sone searching but im at work, and the filters are a pain to get around, so I haven't found much. How is the GTUs VLSD at drifting? I have an opportunity to pick one up for a decent price, but I'm not sure how well it will hold up. My GXL rear end is pretty much done for, it hasn't locked since the first day I swapped it in...

i have one for sale lmk

I'm not LOOKING for one, I already have one I can get, I'm asking how durable they are.

i know just throwing it out there

...

Not to mention you're way to far away for me to be interested...

Well, I assume it's just a standard N/A lsd just with a different gear set in it. Sooooo.... Just as good as any other N/A lsd.

Not quite, it has a viscous coupling in it instead of the clutch type. I just want to make sure its durable enough to handle it.

The diff will hold up, it's the stub shafts that won't. If you're still n/a you'll be fine, but if you're turbo swapped, you will eventually break a stub shaft.

As far as lockup goes, everyone raves for a Torsen or a rebuilt clutch type. The vlsd locks up differently, I never had a problem with it, but I think the others lock up faster.

Just an FYI, if you run the 4.3 and some 15's with low profile tires, you will love it. The car will be noticeably quicker.
Add a miata gear set to that equation....... It's awesome for an n/a.

Being viscous would make it a standard S5 lsd.

What are you running for engine and mods?

Yup. It's a GTUs LSD. That was mentioned in the first post. ;-)

Definitely still N/A. All 117HP of it... :blush:

I have the clutch type in it now from an 86 GXL, but there's a drift even coming up in like 2 weeks, and I won't have time to learn how to rebuild it by then. You mentioned Torsen, Does the Miata rear end really just bolt in? Will I need the Miata half-shafts?

I read a build thread once about a Miata transmission swap into an FC, and it looked ridiculously labor intensive and expensive. Is there a way to just transfer internals? Cause I have like 5 FC transmission that are all bad, so I have the cases, lol...

I don't know enough about the diff's to tell you, but I can tell you about the miata Gearset.

I had it done, and my total cost was around $950.
I bought a used Miata trans from a 2001 car with 11K on it for $375 and had it shipped here from Florida. I tried to take it apart, but after getting the housing off realized it was way over my ability. I took it to RP Performance in at Summit Point, and Bret Machined the input shaft and installed the gearset into the case fore $500. After that I just got some gear oil and put it in.

It's a lot more fun(You can start from an uphill stop in 2nd gear!), but don't expect the car to be a highway cruiser. With the 4.3, Miata gears, and when I was running 15's 80MPH was about 4200-4300 RPM.

Ok, do you know if he just put the NB shafts in the FC tranny? Or did he take the gears off and press them onto the FC shafts? And you have to have the Input shaft machined to fit into the FC clutch? Or can you just get a Miata clutch disk?

viscous sucks.. its slightly better than open. you can either weld it or id suggest finding a stock s4 clutch type or an aftermarket. torsen diffs are about the worst you can have for drifting. they may be ok or even favorable for road racing but are probably rated even lower than open diff as far as your questions go

to avoid these bullshit answers, you should frequent the drift section more often. less people talking out of their ass over there.

vlsd do suck for drifting.
The internal fluid will overheat and will let go, then you will have an open diff until it cools back down. Torsen diffs work but they are very unresponsive vs clutch types. Torsens initial bite is linear compared to a clutch which will bite right away.

Also.....who has diff stubs for a GTUs S5 4.3 diff.
I need a pair BADLY!!!! Mines broke.....

We have a drift SECTION??

Do you think it will overheat just for a skidpad? I've never done any drifting, but there's an event coming up that I'd like to get onto the skidpad for.

BASICALLY, all I want to know is if the damn thing is going to break, or if it will be ok. I'd hate to take a rare diff and blow it up the first time I use it.

You'll be fine. If you break it, it was broken anyway.

Nice. Never seen that before...

your diff wont break but after about 20 seconds, you will be mad that your car wont slide any more.. especially on something little like a skid pad and being new to the sport

Really? Crap. So should I not even bother swapping it in? All I have right now is two open differentials. It would have to be better than that right?

Take the the VLSD out. Grab the clutch type lsd out of the gxl diff put some new clutches in it and oversized thrust washers(to shim it) and jam it back into the 4.3 gearset.

Where can I get the clutches and shims? I've never done this before. Can you tell? Lol.

http://mazdatrix.com/G8LSD.HTM under the section 81-88 Limited Slip Differential Rebuild Clutch Parts:

Two oversized trust washers and two oversized clutch discs should help it lock better. Although the one one I pulled apart had a decent amount of wear on the cone springs(what puts pressure againt the stack), so you may want to consider 2 of those.

use beer cans.
https://www.rx7club.com/2nd-generation-specific-1986-1992-17/s4-lsd-soda-can-shim-trick-942835/

or legit clutch type rebuild
http://forum.miata.net/vb/showthread.php?t=200846

or take one of those extra open diffs and weld it. aint no thang

Oh sweet Jesus, I need 4 at 46$ EACH? HELLL no dude. I can't play like that, lol...

This is what I'm thinking about doing for this event. Problem is, I can't weld... :blush:

Just do it and have fun man. Seriously, I see people with open diffs and stock suspension have more then most and get more angle then some of the hardparkers that talk out of their asses with a 1.5way and PBM coilovers. LEARN YOUR CAR AND GO FOR IT...and be safe.

Well, I tried a skidpad once, and I was super disappointed in my stupid open diff. I was hoping to have one that would help control the car a little better by the next time I tried it. It looks like I'm going to be welding my spare open diff this Saturday, so I'll go ahead and swap that one in, then maybe rebuild the GXL one I have. Who knows.

You dont need 4 new clutch's. The two oversized thrust washers will shim the stack out, putting two new oversized clutches in is for added measure. All told is like $120. If you cant spend that to get the lsd to lock well just gut it and weld it(im not of fan of that).

Oh ok, so all I need is two of 27-2570-M020 (LSD Disc w/inside pins +.1mm ) And two of 27-2530-M020 (Oversized Thrust Washer)?

I did it with only two .1mm thicker thrust washers and it locks alright now. Since im doing rear bushings im putting some new goodies in there.

Does your current gxl diff lock at all?

It locked once or twice right after I swapped it in. Now I'd swear it doesn't lock at all. I have literally no suspension travel right now, so when I pull into my girlfriends apartment complex, I get one rear wheel up in the air. I can rev up the engine, and that one rear wheel will just keep spinning.

Thats horrible for the diff. The house I use to rent had a bad driveway angle and mine could pull up...after the first time I realized it, so I entered with enough inertia to not spin like that.

I mean, I don't sit there and burn it all day. Just for like a split second. But shouldn't the diff lock up?

If your in a pinch, you should just take the open diffs you have, clean them up (clean metal = good strong welds) and find someone who is willing and can actually weld decently.
As long as your fine with tires getting eaten up a bit quicker, chirping tires in lots and slow turns, and not being a jackass in the rain you should be fine.

Yeah, that's what I plan to do for this event, then, since I'll have the LSD out, I'll try to rebuild it.