I know hardly anyone watches these videos but they're the primary reason why I buy things from you and recommend that other people do, too.

On the note of the 3.3 ring and pinion, i do believe Mfactory now sell a 3.3:1, for anyone curious about doing 280km/h with enough power and lack of self preservation

Thank you tanner, I have several of your miata books and enjoy you all putting this See video out and all the others. I have 2005 miata speed and enjoy the part selection you all carry. Dan from Alaska

Lots of diff questions. Thanks for taking the extra time to answer them, I had many of the same questions.

My little NA6 has the visco-diff, it seems it will be fine with the mighty 115hp that car is producing. But now i'm better informed on it all. Thanks FM, these vids are great and im already looking at your store with big eyes!

Excellent overview and information. Its easy to see why FM is the best source for Miata parts and services.

Very informative video Keith. After a good deal of research and instruction from people who have done diff changes many times, I am putting a 3.6 ring and pinion on my MSM torsen. Love the Pink Floyd reference. 😁

It's very very good information for mx5 owners thank you

Viscous is not torque sensing but wheel speed sensing. They need a difference in wheel speed to start locking. Therefore viscous slip diffs are slower to respond.

What I'm taking away from these videos is that the NC is perfect as-is and that's why no one ever talks about us.

think u r wrong I watch ALL the video out of flyin miata . Been a tech for 30 yrs and I learn still from their video and word.

Love these vids, keep em coming!

Has FM made a video on seam welding the targa miata? I want to seam weld my NA and would benefit greatly with a video on how it's done, were to weld and what not to do. I saw the info on the website.. I just think a video would be super cool..

That stuck in a snowbank use the e-brake trick is an old VW exercise. Get your mate to stand on the rear bumper, a little e-brake and off you go.

I put a os giken in my 07 nc auto. Made it difficult to drive with the traction control on as it would set it off all the time. Turn the dsc off and its good ,really good😀. Other thing I think although it may be subjective it seems to work better on turn in with less tendency to partial lockup /grab one wheel as opposed to the factory open diff? Does that sound plausible? Btw great series vids.

49:24 Setting a calendar reminder to come back to this video in 2032 🗓

can you guys talk about why early 90 models have a different clutch slave vs later 90 models?

Can you do a step by step diff assembly with how to set all clearances and pinion preload and so on? Miata na/nb specific

3:30 I think an open differential sends equal torque to both wheels (As for power, that means it sends more power to the faster wheel (P = Fv).)

I'm watching as many of your videos as I can and I don't even have a Miata yet! However, this is the reason why I'm watching your vids, because I'm in the market for a Miata, just not sure which one yet. I was looking at 911's, but the maintenance and repair costs can be as much as a used Miata....fun factors are the same too! So if you're looking for ideas on what do show/film, do one on a V8 installation on an ND. I know, I know that would take some time, difficult since you may not have a V8 project now to video. BUT if you make a video on it as a purchase video it may be worth your efforts. And, I would purchase a used ND ASAP and bring it to you for the project....just saying! All your installation videos are great, although most are on NA and NBs, so please show more on the NC and NDs. I already have a list of things I'll be purchasing from FM once I get my Miata, which most likely will be an ND. Keep up the Great Work, it's greatly appreciated! Thank you for all you do!

I know some companies sell larger housings for the rear differentials on Miata’s to get more fluid in there for cooling and lubrication. I was wondering if you could post a video about that or at least explain the process of doing this. Thanks!

That Hamilton Futura is super class

You said torsen diffs behave like open diffs, when you spin a wheel with both wheels raised. Does that also go for the Miata Viscous LSD??

what is usual initial torque for lsd torsen for mx5 nd

As far as rx7 housings, oiling isn't an issue. There is only a slight difference in the s4 mating surface where as the s5 is nearly identical to the 1.8 housing. The s4 is also around 2lbs lighter since the s5 is only marginally thicker. You cannot use the "pumpkin" from an rx7 without a custom driveshaft and mounting solution for the diff. I actually just put a clutch pack from an rx7 into my miata as well as the rx7 housing. The rx7 housing lacks the breaking notch too so it's a lot better for tracking the car as well as it will survive an impact. I already had one break from being rear ended.

What is this stroker kit you mention for the 1.6?

I'd love to see some time stamps on these videos 😀

FC rx7 NA and turbo diff carriers bolt onto mx5 na/nb pumpkins. people swap them because they are stronger and dont have the notch where miata diffs crack. i have a msm pumpkin on an fc diff carrier and the carrier has welded plates and poly diff bushings from a miata, running insane shafts on it. drives like a dream!!!

I can answer the rx7 question. The diffs are essentially the same as na rx7s with the exception of the pinion length and axle shafts. The covers and mounting ears are basically identical....again the turbo rx7 stuff uses the larger 7 inch ring gear so that has to match. A lot of miata guys swap in the rx7 turbo clutch types which are very strong. The stub shafts and driveshafts would have to be custom.

How to adjust ramp angles for street

but can you drift more easily with locked diffs?

Hi, could you make a video about intake systems, throttle body differences and intakes across the years/ engine range, and which works for na and fi. Cheers

I have a 2004 mx-5 Mazdaspeed with the Little Enchilada package and my diff destroyed itself somehow. Either I hit something or a gear came loose. The case was destroyed. Dealer said he had never heard of that happening. Cost me several thousand for a used one. Car was driven gently serviced properly and around 50k miles.

Can you do one about brakes -how total piston area + brake system pressure are ultimately what affect clamping force (not number of pistons, though they help to better distribute that pressure) -what the difference is between different types of brake pads (semi metallic, metallic, ceramic, carbon, etc.) and their characteristics (Mu vs temperature, heat capacity, etc.) -rotors (size vs brake torque, mass vs heat capacity, importance of cooling vanes and their design) How to compare and evaluate braking systems (braking systems equivalent of horsepower in the "other" direction, how much energy you can dump into the braking system in a given amount of time and how much energy you can reject from the braking system into the ambient environment) Most importantly, how tires factor into the equation as they are the mechanism by which brake torque is ultimately converted into "stopping force"

How about a video of putting in new diff seals. There’s one video how to rebuild a whole diff but not just seals: mainly pinion shaft seal and crush sleeve

@flyin' Miata is there a video on how to choose spring rates vs sway bar rates? How do you know which one you stiffen?

I want to upgrade my Miata NA 1.6 open diff now😂

Does combining an open diff with RB front and rear sway bars along with DIY Billies and the “dual duty” SuperMiata alignment make for a bad time?

What about sourcing the Belleville washers inside the torsen type 2 diffs. Does flying miata sell these?

Are the Global Cup cars running the Tochigi Fuji differential?

What would a good diff be for occasional drifting but mostly daily driver ND1?

What's the torque bias ratio of the ND club LSD? It's not a clutch type as those need servicing somewhat frequently so surely they must be torsen (or some other helical, Quaife type)

If I had a genie, I'd wish for an incredible LSD for the 2014 Mk3 GT Auto. Or at least an answer to why an open is on the automatics instead of an LSD.

I have a really big question and I'm getting ready to undergo this. I'm swapping a 43 gear ratio onto the 36 differential. I was wondering if you guys could do a video on that if or if that's something you guys do but it's something I'll be doing and I was wondering if you guys go to elaborate more on what it can and can't do for the car a positive negatives please if it's something you guys will be willing to do much appreciated. Thank you!

What diff for a RF ND with an auto? And why didn't mazda offer it on the GT's

Eliminator was like a legend. I've spent hours drooling over pictures of his car.

I have a 92 NA. Living in south-east ALBERTA I spend a lot of time at 120 kmh with is not fun. What miata diff should I look for to lower the rpm or should I swap in a Cadillac diff?

I have a stock 2003 miata . What kind of diff do I have and what fluid should I put in it ?

Do a bit on all of the coolant reroute options and their pros vs cons!

Does the spacer on front of the diff wear out?

What's the difference from a solid spool to a welded open diff ? I have a welded diff in my nbfl and It still handles / turns quite well so I'm interested in knowing why a solid spool makes such a difference

For 400+ hp V8 swaps, would you recommend the Ford 8.8 or the GM Getrag

I am trying to drift my nb casually - should I go for torsen or weld the open diff? Will the torsen lock both wheels when oversteering?

How about a complete engine rebuild series or maybe a engine built for boost series

I guess FM is no longer selling the clutch pack diff? I could not find it n the website. I realize the video is 3yrs old, lol.

My 2019 Club 6 speed automatic does not have LSD. Would there be any warranty issue if I installed an LSD? Any drive train mods, or just a drop in?

I know you guys work with any Miata but, what is you guys favorite?

FC non-turbo RX-7 -- the rear aluminum carrier is the same as the NA8 / NB diff (but with different rubber mounting bushings).

does the oem clutch pack lsd from rx7 fit the miata?

lol Keith, the name on your lab coat is priceless.

I have a 99 1.8 Miata 5 speed with a 4.3/1 Torson differential, can I just put in 3.6 to 3.9/1 gears in so I can put in a 6 speed or does the entire diff need to be changed. I am tired of 4000 RPM at 60 MPH. I need another gear. Good at stop lights but fatiguing on the freeway.

What is the Lego model you used?

On car-part.com Miata diffs are listed as "locking" or "w/o locking". Which one refers to a torsen? Do you know of a better used car part resource for sourcing differentials in North America?

Torsens & Helical Diffs do NOT operate on a worm gear worm wheel basis. This is the most common misconception about Torsens. If you build a diff using worm wheels and worm gears it will 100% be able to lock the diff even with one wheel off the ground. The theory behind "worm wheels can't drive worm gears" is of course correct but the helical gears inside a Torsen/Quaife/Helical Diff are NOT worm gears (clearly evident by looking at it's cross section down the axis of rotation, you will see many teeth if you look at the gears inside a Torsen/Quaife/Helical diff but if you do the same thing to a worm gear, you only see one tooth). How Torsens/Helical Diffs ultimately operate is related though not the same, the angle of engagement between the gears in the differential create a thrust force through its axis of rotation into the casing itself, this creates a tremendous amount of force and friction. It's this friction that allows the differential to operate in the limited slip condition. The angle at which these helical gears are cut and meshed are ultimately what affect the torque bias ratio of the differential.

Small correction at 3:10. With an open diff, both wheels always get the same amount of torque. So if one wheel is spinning and has low grip, the other wheel will get an equally low amount of torque.

Different turbos topic?

How good is a 4.3 LSD 🤔

Why doesn't "IKEA Råskog" deserve a diff?

open diff actually send the same amount of torque to both wheel so the unloaded wheel will spin faster.

Video ideas: RX8 to NC wheel hubs and bearings.

"Gi-ken" not "Gai-ken"