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-   -   Tamiya TT02 Thread (https://www.rctech.net/forum/electric-road/700357-tamiya-tt02-thread.html)

Dan 04-19-2024 06:09 AM


Originally Posted by River19 (Post 16093894)
Is that different than:

Tamiya TT-02 Oil Gear Differential Unit 54875 OP-1875


I just packed my TT-02R front diff with 30K grease but my rear is still just AW......but I am also scratching my head at possibly spending like $60 on 2 diffs when the whole car was $150 lol

Then again I already have $60 worth of steering linkage and universal upgrades

It is Tamiya part #22049 which I was referring to and only $25. It is an overall better design.


LordSchnert 04-20-2024 04:57 PM


Originally Posted by River19 (Post 16094415)
Weekly local Thursday night carpet races last night........didn't go well with the TT-02.

Got there early and had it pretty dialed in.......was turning 13-14sec laps and the occasional 12.9......that is very competitive for us. When I came back to the pits I noticed the inside of one of my tires needed to be re-glued, so I regaled the tires.......car was never the same and a complete oversteering mess. Through all heats and the Main.

After the races I stayed a few mins to try a few things. Since I have tried everything to make the lowest ride height work (about 5mm front and rear) I needed to try something very different. I raised the rear to the top hole on the lower arms for the CVA mounting and went back out. Totally different car of course, now I was prone to traction rolling BUT I could hustle it around the track for 13-14.5 second laps vs. the fish tailing spin-out machine I had.

Since I have the softest springs in the rear with no spacers I think next week I will first try a medium or large spacer in the rear to firm it up a touch and see where that lands me before I go up a spring rate.

Damn TT-02s......they are like the girl in college you know you shouldn't be with but you call each other when you are drunk and you just cannot stop that behavior......

At least I won with my TLR in the 17.5 2wd Buggy class

That’s why I race Tamiya’s… the challenge of pushing them way beyond what they were intended for.. the look on people’s face when they realize it’s a Tamiya.. priceless 😎

wallstreet 04-21-2024 11:34 AM

Does anyone have a part number for the tt02 gear diff screws with Allen head.? can these be bought?

viking44 04-22-2024 01:14 AM


Originally Posted by Rinskie (Post 16094043)
They are also cheap so you can have a couple spares set up with varying amounts of putty in them for different actions.

I’ve done this exact thing, and ID the diff stiffness by the number of washers I use on the diff screws. 4 screws in the tightest diff with Bad Horsie diff grease, all the way down to no washers in my loosest diff.

Its a pretty obvious difference between the tightest and loosest settings but it keeps the in between settings in order.

But since getting an XV02, I’ve been getting more oil filled diffs and using the different XV02 diffs in the TT02. Even the 40T diff in the rear of the TT02 feels pretty good (to me at least).

River19 04-25-2024 01:13 PM

Thursday, which means my weekly battle with the TT-02 Mustang that does "Mustang things" as it clearly had multiple personalities with attention spans shorter than a 5min race as the car's drivability changes several times in a race it seems......

But I feel like tonight is the night.

Since I was busy with my TLRs over the past week since the last TT-02 race I literally haven't taken the body off to tinker at all, therefore, I expect nothing........but I had it somewhat drivable after the Main when I reverted the rear suspension and ride height to the higher setting......so we shall see.

Any betting action on whether I have better results or come back with my usual "the car was a mess" post lol........

River19 04-26-2024 06:48 AM

Fine, no takers......lol

Race was fun, the TT-02R was much more competitive this evening in our Tamiya tub-chassis class. I technically took 4th in a relatively small field but really I took 3rd as I passed the 3rd place guy twice but there was a transponder glitch, all in fun, it is what it is.

The fastest guys are 2 Euro trucks with really good drivers.

The car handled much better with the rear suspension raised as I did after last race, was able to turn consistent laps in the 12.6-14.0 second range with the winning laps being consistently in the 11.5 to 12.5 range.

I will say, my car is much quicker down the straight than my closest competitor with the TT-02 Subaru kit, most likely the R's gearing........

leadfootedfool 04-26-2024 08:05 AM

I'm just jealous you have some Euro trucks racing, I'd get back into my TT02s if I had that nearby.

River19 04-26-2024 09:26 AM


Originally Posted by leadfootedfool (Post 16096132)
I'm just jealous you have some Euro trucks racing, I'd get back into my TT02s if I had that nearby.

Out of the box the Euro Trucks on the TT-01 platform seems to handle and perform well, especially in the hands of a good driver.

The TT-02s seem to require more constant attention to setup and tires vs. the trucks spec electronics in both (Torque Tuned etc.)

River19 05-10-2024 05:56 AM

Figured I would inject a little life into the good old TT-02 thread.....

Had our weekly carpet race last night with a couple regulars finally getting TT-02s up and running as well some guys getting the Euro Trucks going (just a matter of time for me).

Some of the regulars raced in a recent TCS event with mixed results, per their feedback the level of gray area cheating was kinda disappointing and they raced in several classes so it wasn't limited a spec class etc. But I can't say I am surprised. Many folks live by the mantra of "if you aren't cheating you aren't trying".....

Meanwhile, 2 guys literally finished up their TT-02s prior to the first Qualifier and it reminded me how sketchy the TT is right out of the box without tweaking the End Points back to dial out steering etc, Poor guys were all over the place. We got them somewhat sorted but it also showed me how far I came with mine.

Took 3rd in a full "Main" and was leading for a bit......finished very competitively right behind the two best drivers running the M chassis as we run "Tamiya Tub Chassis" to ensure a full class. Although I took a really hard hit in my Q2 race and somehow that hit knocked my ESC into "crawler" mode with full drag brake and we never figured out how to dial it out so for the Main I had to turn on my controller, the car and then dial up my throttle trim to 70 to back out the drag brake and make it driveable which got me to 3rd in the Main and this week I'll figure out what is going on with it and a proper fix......

But I am also racing clay on Sunday and I am in the middle of a Schumacher build so plenty of RC projects in additional to other warm weather hobbies etc.

TT-02s......silly fun for relatively short money

LordSchnert 05-10-2024 05:46 PM


Originally Posted by River19 (Post 16099534)
Figured I would inject a little life into the good old TT-02 thread.....

Had our weekly carpet race last night with a couple regulars finally getting TT-02s up and running as well some guys getting the Euro Trucks going (just a matter of time for me).

Some of the regulars raced in a recent TCS event with mixed results, per their feedback the level of gray area cheating was kinda disappointing and they raced in several classes so it wasn't limited a spec class etc. But I can't say I am surprised. Many folks live by the mantra of "if you aren't cheating you aren't trying".....

Meanwhile, 2 guys literally finished up their TT-02s prior to the first Qualifier and it reminded me how sketchy the TT is right out of the box without tweaking the End Points back to dial out steering etc, Poor guys were all over the place. We got them somewhat sorted but it also showed me how far I came with mine.

Took 3rd in a full "Main" and was leading for a bit......finished very competitively right behind the two best drivers running the M chassis as we run "Tamiya Tub Chassis" to ensure a full class. Although I took a really hard hit in my Q2 race and somehow that hit knocked my ESC into "crawler" mode with full drag brake and we never figured out how to dial it out so for the Main I had to turn on my controller, the car and then dial up my throttle trim to 70 to back out the drag brake and make it driveable which got me to 3rd in the Main and this week I'll figure out what is going on with it and a proper fix......

But I am also racing clay on Sunday and I am in the middle of a Schumacher build so plenty of RC projects in additional to other warm weather hobbies etc.

TT-02s......silly fun for relatively short money

The TCS races I have done seemed to be pretty fair.. you do run into some hardcore Tamiya racers.. so just because they are crazy fast, doesn’t mean they are cheating.. they probably spent their entire lives racing Tamiya cars.. just think of it this way.. you started on your TT02 journey a couple months ago.. and now you are running A finals.. now imagine if you keep at it for another 20 years 😎

River19 05-10-2024 06:31 PM


Originally Posted by LordSchnert (Post 16099682)
The TCS races I have done seemed to be pretty fair.. you do run into some hardcore Tamiya racers.. so just because they are crazy fast, doesn’t mean they are cheating.. they probably spent their entire lives racing Tamiya cars.. just think of it this way.. you started on your TT02 journey a couple months ago.. and now you are running A finals.. now imagine if you keep at it for another 20 years 😎


Oh I get it. On the flip side, the guys that I know that went, are some of those Tamiya 20+ year guys and they were kinda frustrated with the experience. It is what it is.

At the end of the day I think their biggest gripes were in the "built per the instructions spec" rule where the Euro Truck's should not have the shock bodies packed with grease to add additional dampening and they sure as hell are not installed inverted. But whatever......not my pig not my farm......

Regardless......what I DO love about Tamiya is their variety of vehicles and platforms that allow for easy entry to racing and for those of us who can and do afford some of the fancier and more spendy platforms the Tamiya TTs offer really fun and close racing in a somewhat spec class. I love our informal "Tamiya tub-chassis class"....TT-02s, TT-01s/Euro Trucks/ M chassis FWD etc......if we have enough for separate classes for TT and Euro, great, if not......we run them together and have a blast. As you mentioned I have come a LONG way with this TT-02......and honestly it scratches my "on-road" itch for now.

I have a LOT of $ invested in off-road right now with 2 TLRs and building a Schumacher L1R..........

That being said, I see a Euro Truck coming,......I mean $160 with motor and ESC seem's like a no brainer.......$50-60 for a servo, $45 for receiver and go race another class.....

LordSchnert 05-11-2024 06:04 PM


Originally Posted by River19 (Post 16099688)
Oh I get it. On the flip side, the guys that I know that went, are some of those Tamiya 20+ year guys and they were kinda frustrated with the experience. It is what it is.

At the end of the day I think their biggest gripes were in the "built per the instructions spec" rule where the Euro Truck's should not have the shock bodies packed with grease to add additional dampening and they sure as hell are not installed inverted. But whatever......not my pig not my farm......

Regardless......what I DO love about Tamiya is their variety of vehicles and platforms that allow for easy entry to racing and for those of us who can and do afford some of the fancier and more spendy platforms the Tamiya TTs offer really fun and close racing in a somewhat spec class. I love our informal "Tamiya tub-chassis class"....TT-02s, TT-01s/Euro Trucks/ M chassis FWD etc......if we have enough for separate classes for TT and Euro, great, if not......we run them together and have a blast. As you mentioned I have come a LONG way with this TT-02......and honestly it scratches my "on-road" itch for now.

I have a LOT of $ invested in off-road right now with 2 TLRs and building a Schumacher L1R..........

That being said, I see a Euro Truck coming,......I mean $160 with motor and ESC seem's like a no brainer.......$50-60 for a servo, $45 for receiver and go race another class.....

Agreed on the Euro truck being a box stock class.. I am surprised the race director let folks get away with that..

skater-deez1 05-12-2024 07:32 AM

The performance difference with the tt02 and euro trucks comes down to the treaded euro truck tires. On equal tires(usgt spec tires at my club) it's a whole different story. But if they were running the euro truck tires.....good luck those actually work really well.

magnumcyclonex 05-12-2024 11:19 AM

Went racing yesterday at my local indoor carpet track (btw if anyone is in the San Francisco Bay Area, look up Pole Position Lemo Carpet Racing on Facebook - they have many classes and are run pretty well for their first season. I had a blast racing!).

Their Porsche Cup class is a TT02 with specific allowed option parts. I got the 54752 Steering Upgrade Set and unfortunately shortly into the main, the 5mm ball connector snapped off clean, leaving the thread inside the steering arm. I have never had a ball connector snap off like that. The thread portion is completely within the steering arm, and there is no protruding screw from the other end.

How do I get this out? Thanks in advance.

Sabin 05-12-2024 12:15 PM


Originally Posted by magnumcyclonex (Post 16099958)

How do I get this out? Thanks in advance.

You'll have to drill it out.


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