You’ll need Tamiya 51008 differential internal gears from the TT01. This will allow you to use the stock keyed outdrive cups. You can’t use the TT02 differential internals because they have 4 planetary gears laid out in a cross. This ring gear has 3 screws and will need the 3 internal planetary gears laid out in a triangle.

For the diff housing, you’ll need 51004 also from the TT01. You still have the issue of the plastic pinion gear driving the steel differential gear. Which may not cause issues initially, but might wear out that plastic gear sooner.

I'm not sure where they are from, I got them with my TT-02B kit. I bought it used and it came with a bunch of extras. Thought I had everything for these metal diffs but I didn't notice the different hole pattern.

I have the 3 metal internal planetary gears laid out in a triangle and the metal pinion gears (propeller shaft gears) so I'm set there. 51004 is exactly what I was looking for! Thank you.

They are from the DF-02.

Paint, finally.
https://cimg3.ibsrv.net/gimg/www.rct...4bec7a32f5.jpg

TRF Dampers
 

Hi,
Need help from Tamiya experts here.
I am in the process of finishing my TT-02 & looking to spend on a set of TRF ALu Damper set.
I got confused by the choices available.

Based on my own study & research, below are my findings:

(A) TRF Damper set (53571)
From Tamiya -length when assemble = 61.5 mm

(B) TRF Special Damper Set (42102)
From Tamiya - more advanced than (A) 53571
My conclusion - length = 61.5 mm

(C) TRF Short Damper set (42273)
From Tamiya - 4mm shorter than TRF Special Damper (B) 42102
My conclusion - length = 57.5 mm

(D) TRF Big Bore Damper (42287)
From Tamiya - OD remains unchanged, ID is bigger, so 10% more oil
My conclusion - length = 61.5 mm

(E) TRF Big Bore Dampers + (42354)
From Tamiya - Compared to TRF Dampers, this set comes with better parts
My conclusion - length = 61.5mm

(F) TRF Super Short Big Bore Damper (42305)
From Tamiya - this set is 6.5 mm shorter than TRF Special Damper, 1.2 mm wider cylinder interior
My conclusion - length = 55 mm, not sure about the body OD.

(G) TRF Super Short Big Bore Dampers + (42353)
From Tamiya - this set is 6.5 mm shorter than TRF Special Damper, 1.2 mm larger cylinder internal diamater, better parts than (F) 42305
My conclusion - length = 55 mm, not sure about the body OD.

Questions:
1) If my findings above are correct in term of damper length, (A) 53571, (B) 42102, (D) 42287, (E) 42354 can be used on TT-02 with its original plastic damper stays. (/ shocks towers)?????

2) What about springs, do they all (A, B, D, E) share exactly same size of springs???

Let me know what you think.

Thanks

1: you want to use the first TRF dampers on your list.

2: no, springs can only be used by bore size. The older design springs (small original bore) long or short can work. None of the big bore springs will work on small bore dampers.

There are option parts you can buy to change the upper shock mount to use the big bore lowers them) but really the original TRF dampers are the ones this chassis was designed for.

I built my TT02 with the (plastic) super mini CVAs specifically marketed as for the TT02 (54753), and they build to 55mm eye-to-eye. A 61mm shock is going to be almost fully compressed @ ride height - I can't imagine that's the correct choice for this car (non-Type S)...

OK, guys

Need your help here.

From thercracer.com, it says with 42102 shocks & standard springs, it can arrive ride height of 5mm - 5.2mm

I put everything in, my right height is about 6.3mm now. My spring collar retainers are already at maximum height.
What did I do wrong???

What about you?? what ride height you are getting with the TRF shocks??

How far were your rod ends threaded into the shock shafts? Maybe they could go in a little further? Could the shock shafts in your particular kit be slightly longer than normal?

Did you use the long or short shock shaft eye?

Maybe it is due to different tyre diameter?

As silly as it sounds, what if the kit was built in the high or "rally" configuration by mistake?

the short one

Nope. no issue with the tyre diameter

I thought so.
Hence I rechecked everything & the kit was build as standard wheelbase, low.

I went thru the shock again & I did not see anything wrong.
Still wonder why I cannot let it go lower.

I highjack this thread... I m a fan of my type S/RR and now there hits a new aluminium steering the market (Tamiya - 54965). My is ordered and I m waiting, but anybody already drive the new hop up and tease pros and cons?

thanks

I just revisited thercracer site and checked the article.
The author mentioned a ride height of 5mm front and 5,2mm rear, but not how these are achieved. He is using the 42102 TRF shocks, but no indication which spring or other settings are needed to get there. So, maybe you are kind of misguided at the moment?