Hey Greg... the diff carrier you’re using is from a S4 (86-88) Rx7. The S5 (89-91) carriers are 2lbs heavier. The S5 has thicker webbing across the "beam" .475 vs .320 for the S4. The S5 also has been triangulated in the beam area as well as having the lower web of the beam merge with the output shaft saddle. All in all the S5 is a beefier unit.

14:22 i watch for that joyous face when things actually go right. And RIP that front lip, may the asphalt have mercy on its soul

Miata Dad back at it again with a fresh upload. It’ll be worth being late to the office for this 😎

It's just like uncle Ben says with great power comes great diff destruction

Good job, thanks for the tip broke several on my v8 miata.

At least you didn't blow up the transmission again, can't wait for +400hp pulls

I just found a Miata for 600 bucks with just a broken differential with no other issue and low mileage, if he sells it to me il hopefully will be able to repair it thanks to your super helpful videos

Weld plates onto the stock diff. It's cheap and just as effective. Bolt on plates are never as strong or rigid.

The one dislike is the diff carrier

I love that exhaust note, but I like seeing you back on youtube even more!

I make that 'will it break' face too when I mess with things.. But yeah, this is such a great channel, thanks for spending so much time making all your vids.. Will be going through each one as I'm now starting my own nb turbo build, wanna get it right and learn from your mistakes!

Saw this video when it came out. Today, I ordered the PPF delete kit for my VG30 swap. Thanks for the constant inspiration Greg. 🤟🤟🤟

13:16 The sudden unexpected beefed up zoom gave me a good laugh. Another great entertaining video. Keep it up Boiiii

Always improving your content! Love hearing that turbo.

Great video with lot's of incidental tips and stats to learn from as usual.

The crack in the broken carrier runs right through the bolt hole there. If the hole was drilled, that's definitely what weakened it!

A broken diff? Well that answered a recent post of mine asking how well the VVT build is holding up. Great seeing you back.

Super nice of your diff to give your transmission a rest for a change :)

This just happened to my stock 2013 NC. It allowed my axle to separate as well. Luckily, the NCs mounting "ears" are on a separate mounting plate bolted to the diff.

Would love to see an rx7 clutch pack swap to go along with the diff carrier. I have a na8 now and I never swapped the guts on my 1.6. So I have this thing laying around with nothing to do with. I devour every video you post buddy. Much love from the bluegrass state.

So glad you posted this after I got mine Haha I'm sure the price on rx7 housings is gonna skyrocket actually watched your diff bushing video last week rock on Greg!!!

After seeing this I bought one from ebay for my build as extra insurance, but true to what you said with builds. Things didn't go as planned. The first one, the guy sent me the wrong part. He sent the front nose, not the rear case. He already sold the case, but was kind enough to let me return it and gave full refund. I turned around and successfully bought another case from someone else, cheaper...winning!

Been waiting for a decent video. Had a FC diff sitting under my VG swap wondering if I could use it.

Your videos never get old 🔥✌

I needed this vid like a couple months ago lmfaooo I couldn’t find one at all

Love all the Easter eggs you plopped in there. I laughed.

Ah i thought this was going to be a clutch LSD swap out. Looking for info about that for when I swap out my welder... seems a lot cheaper than a custom diff. Edit: I rebuild automatic gearboxes all day and you did a good install on that drive shaft seal. Perfectly done, you got RTV on the inside of the bolt holes too which is missed out by a lot of people.

I’ll be doing diff seals soon so this helps as a refresher 👍🏽👍🏽

“I need to look good for my fan.” @15:48 🤣 singular, only one fan? Lol

Mine just broke as well, a rock fell in front of my car while driving through a canyon a destroyed my diff. I removed the diff and was able to weld and reinforce the whole thing, I just got it back in yesterday and seems to be working great.

A good tip on removing the axle seals and rear main seal is to drill a hole and then screw in it self tapper and then you can just pull the self tapping screw by the head with pliers

Great Video. Would have been nice to know the difference in weight between the two Carriers though.

Oh shit you're back!

I get face ache driving my NA - the stupid wide grin that lasts for as long as the trip.

Bro how do you only have 90k subs still ive been here since around 70k and youre videos are epic

Always coming through that knowledge, never knew the rx7 carrier was compatible. Thanks Greg

They built these diffs to serve the 120-140hp these Miatas came with,and they meant it. I've read mixed reactions to the rx7 diff. Some wrote they were great to supposedly like 500hp,others claim 300hp or more and it'll explode. I'm thinking if anyone is looking for more strength on a budget,the rx7 is the way to go. Me personally,I'd do either the heavy 8.8 irs or the lighter getrag. Both have plus's and minuses. 8.8 it's,is heavy but are everywhere pretty cheap. Buku parts and ring sizes are available. The getrag,it's much lighter than the 8.8,but no where near the aftermarket support and ring gears.

Holy shiiiiii a new vid. Hewl yeahhhh boooooooy. And I've been tryna learn about this too

Nice shirt, I'm always supporting josh

Do it for me again by hand big boy 😘 lol ❤️❤️❤️ loved the video. Good to see you again! 🙏

Got me thinking an FC RX7 would be a great new project on the car passion channel...

Hey Greg how come you’ve never ran and Frame rail guards? It’d be cool to see you rock one. Thanks for today’s upload

The S4 N/A RX7 can have the clutch type diff. The S5 came with a viscous or open diff.

Nice little mention of the Ricer Miata

Thanks for your video! Will this mod fit to Mazda mx 5 NB SE 1.8?

What a great upgrade idea!! Noted

Will be doing this when I break mine 👌🏼

For a second i thought you were gonna clean your wheels😂

Are the weld on braces worth installing. Mine already has stress cracks there from the stock motor

I got the Torsen 3.9 I think. Super pumped.

Glad to see you are wearing gloves

Very helpful

I was wondering if your exhaust touched the kmiata PPF delete kit. I have that kit that Im gonna install and on a dry fit, my resonator interferes. Thanks.

So glad I kept the carrier for my rx7 2 way 😅

Thanks Creg!

14:55 your rear sway bar end link is being held on by the will of the car gods alone

I'll buy your old diff when you get your Getrag setup!

I have a 2003 miata and my diff broke in the place you show in the video . What year rx7 housing should I get so I can use the diff I have . Just to be clear I can use the diff I have and it will fit a rx7 housing right ? I noticed you said fc rx7 at 15:07 . what year does the fc rx7 carrier come out of ?

Greg how come you dont have frame rails and butterfly brace on your miata after all this time? any reason for that?

Hi just wondering where you got the ppf delete kit from? Has it held up well? Lots more vibration noise?

Talking about the PPF, does that actually make a difference to either the regidity or the performance?

What kind of exhaust clamps are those?

Will an NA FC pumpkin bolt into the Miata in its entirety? I'd much rather have a Clutch type diff. Hell, I actually have a Turbo FC diff lying around. I may put that in there if it's similar enough.

Awesome

Ryobi send this man some power tools!

Hey G do you know if all FC RX7 diffs will work... Turbo any stronger than the the NA FC. BTW nice work and love the pointers on the seals as mine are about to get replaced.

6:20 Ooo look, a penny!

Thank you!!!!!!!!!!!!!!!! GOOD LOOKS

Can we see what it takes to kill the rx7 diff? Before you install the getrag

Hey there, I've been watching your video for long time and a big fan. I have a few questions wondering you could answer cause I'm using cd009 transmission. 1st were you making over 450 to 500hp when you installed the rx7 diff if so do you think reinforcing the diff bracket would help? 2nd i saw you upgraded the rx7 diff to a Cadillac diff and it solved a lot of issues you were having. Do you think it was necessary cause you didn't explain if the rx7 diff was a temporally fix or if it broke as well? My opinion are staying with rx7, or ford 8.8, cadilic o 350z? The car will be making 500hp and wanted tour input. Thank you.

Dad of Miatas, how do you install Vlsd ears. I know one is longer than the other, but have no clue how to get them in

Whats different between the FC NA and turbo diff carrier and why only NA version fits?

Yo, massive thanks for this as I've just done it to mine. Need to ask, when bolting the carrier back onto the car, did you find that the outer rubber on the mounting plates don't press up against the arms? Is this okay?

Do you know does RX8 torsen LSD fits into NB diff housing?

reliability -100 points, in stitches man :)

Allways happy with yours videos,,, but my Miata is a 2008 MC ☹️☹️☹️.. and I like it a lot,,, because I feel it more stable and the looks.. but I looking for your's videos on the NC,,,, Sometime in the future..!! 🍷🍷🍷

If I use the N/A FC clutch differential. Am I able to reuse my axles?

oh yeah miata dad, give me those uploads

Hay man so I have a 1.6 diff that I have narrowed down and boxed and welded how much power do you thank it will hold with stock gears car is super small and only weighs 1350 lb. Any knowledge helps :)

goat

Kmiata's stock just dropped 7 points. That being said, I may weld mine on. Thanks man!

Why is the 1.6 diff weaker? Is it the crown wheel and pinion?

Do you think the K-Miata differential arm reinforcement plates made a difference in prolonging the life of the diff before it snapped?

Did the NA Rx7 FC come with an LSD??

On the bright side diffs are easier than transmissions lol

Didnt you have the K miata diff brace? So the brace failed?

🔥🔥🔥

Whats the diference betwen the turbo2 and non turbo It will still fit?

In the end it's a roadster weighing under a ton. I don't this Mazda thought some guys would be pulling a lot more horse than stock.

Does the fact you lost the power frame support have anything to do with the diff carrier snapping?

ay dog what happened to your front splitter

Did the front lip break at the end of the video?

Somebody outta make/sell a truss for the diff carrier on our cars. Works great on Jeep axle tubes stopping them from getting banana'd by 40" tires and locked diffs.

FOR SALE: K Miata diff brace 😂👍🏻 Question.. 1.8 half shafts. I heard the MSM kind are thicker. Does anyone know if the splines into the diff are the same between normal 1.8 and MSM. Cheers

Need a drag race between you and rudnick for sure it would be so fucking awesome

Is the spring in the diff seal important? Noticed that I forgot to put them back in, and it's all assembled now 😅

Greg got so much traction from the Paco arms it broke his diff.

Did you use RX7 or Miata axle seals? Gonna be installing mine with a euro 3.63 Torsen rear end next weekend

Daaaaaaaamn yo Miata THICC!!!

great video, what tyres do you run?