You have 2 options. GPM make the gears in metal, so you can buy the full set including the internals which is expensive, or just the ring gear which is also expensive for a single gear but less so. RCJaz have the GPM gears

Or grab metal parts bag from the DF02 and the gear cases. This gives you enough to build 2 diffs for the price of a single GPM set. You need to file the pinion down a bit. I'm pretty sure its bag a, part 9400152, but you better check.

As a bonus the bag includes other bits like a 19T steel pinion which is a good match for a 13.5T and a bunch of those annoying self tappers Tamiya insist on using (I love Tamiya but wish they'd use proper hex head screws and bearings instead of bushings). Oh and another Tamiya hex wrench, you can never have enough of those.

I find that the metal gears slow the car considerably on the stock motor (have a couple TT02B's for my 5yo and his friends) but the 13.5T brushless setup like you suggested is the perfect match for the chassis and you don't notice the car being slower with metal gears on this setup.

The GPM gears (which I own..) are just the ring gears. Sadly.

So.. those gear sets, are the three gear sets, like in a TT01, so I'll need the TT01 casings to match that. STill, not a bad deal.

.................................. This is such a bad idea. But I really want this TT02b to work. hah.

Yep the DF02 gear set is the 3 gear so you need the cases

If you have the ring gear already...

https://www.rcjaz.co.nz/tamiya-tt02b-steel-propeller-shaft-gear-1pc-for-tt02-gpm-tt2100g2-p-90071612.html

thats the one you need right? There is also the complete set

https://www.rcjaz.co.nz/tamiya-tt02-steel-ring-gear-bevel-8pcs-set-for-tt02b-gpm-tt2100-p-90070804.html

you should see some of the builds on tamiyaclub, go nuts on the TT02, end up spending more than a TA07 /DB01 and they still won't perform as well. Fun though

any brands that produce hex screws for the tt02? i really dislike the philips. suggestions welcome!

Yeah Racing sells a Ti screw kit for like $14. I have used them in the past and they are decent for the money for sure

I end up buying bulk m3 machine screws off of ebay every so often. It's not a lot of money to get all the screws you might need.

Here's a decent deal on M3's and it's prime to.

I really recomend against buying stainless screws.

If you're gonna do it, do it right:
you'll need some countersunk too...
Really though, I go with ebay, and buy the exact kinds I need.

Stainless always goes "soft" and tears under load.

You have to to go with Tamiya 53792 if you want to use original Tamiya parts. 54515 will not fit TT-02 RR machine, they are too long.

Regards
Michael

Not necessary...
 

...Kit stuff works fine with the universals.
But you can upgrade the grub screw secured wheel axles with spring fixed ones. (Tamiya Part number 54623)

Michael

Need rear downforce
 

Looking to get a new body with lots of downforce in the rear. I can only use a Tamiya TT-02 body, and can't add rear wings. Anyone know which one would have the most, or what I should be looking for?

Check out the Raikiri Body from Tamiya. Comes in box stock form so you should be good to use it.

I'll probably get that one.

The kit tires tamiya 51049 medium compound are good for what surface carpet or asphalt. Rather use them up on practice days than have them sitting in a box

They're ok for ashphalt.

No good for low-grip carpet.

Have you upgraded the plastic dog bones and center shaft to metal/aluminum already? If so, you can use 23t, 21t or 17.5t.

It was a really good idea to do a yellow Mustang Body. Looks awesome!
​​​​​​Regards,
Michael

Thanks man, Yellow is my one color wonder on my Tc's haha. I added more stickers to the stanger since the pic for some more scale effect but it turned out pretty good with the Tamiya sticker sheet.

Which is your preferred yellow?

Tamiya PS6 backed with some silver :D

That's cool they have a class like that, I didn't even realize. We haven't has a TCS series in Canada for a very long time but I wish I was apart of it when we did. Seems like some awesome grass root hobby oriented classes. The TT vehicles are actually pretty capable, this isn't directed at the die hard racers but these kit's are great for new comers and kids to build them selves. With little to no adjustability at first it keeps things simple and makes them focus on the drive instead of all the tuning. Tuning is great and it's one of my favourite things don't get me wrong but but some folks need less wrench time and more play for time for the enjoyment :)

Did you do anything to the dampers? Or just stock kit with springs only?

Didn't do anything with the friction dampers other then add or remove the spring spacer for a different effect. In the past with the Hahn truck I have added grease to the friction dampers to kind of help the whole situation but I didn't this time. I may in the future I feel it does help a little or it's in the mind but the option is there lol. The car kits compared to the truck has alot less bounce and is less top heavy but mind you the Mustang body all stickered up is at 150gram which is pretty beefy

As seen in the pic ready to race coming in at 1380g currently with a 275-280g battery weight. Shortening the ESC wires alone was worth 10-12 grams off the top of my head but I really did it just to be tidy and neat. I also removed the orange wire right off the ESC board as I will stick with the silver can. Can always solder it back in though if I choose

Internal gear ratio is 2.6
​​​​

What you need to do is ditch the Tamiya .6 module gear set all together. So buy the Tamiya "high speed gear set for the TT02" Which all you really need is the alum adaptor for the spur (don't use the supplied .6 module spur) Then buy a yeah racing adjustable alum motor mount and convert it to 64 pitch. You will need some wild gears to get it close to 3.8-4.2 FDR.. like a 80-82 spur spur and 50-53 pinion.

https://cimg2.ibsrv.net/gimg/www.rct...80a1dcf1e3.jpg
https://cimg4.ibsrv.net/gimg/www.rct...e9659cc055.jpg
https://cimg6.ibsrv.net/gimg/www.rct...0b9526d61d.jpg

This is a great inexpensive option if you want to be able to give people a great intro spec class with a car that does have options to move to other classes that needs more flexible gearing. Unless your racing a TCS event this is a great option.

Absolutely! I almost want to take my box stock TT02 posted above and swap it out for a proper 64pitch FDR set and see what a stock kit geared can really do lol..