skom25 632 Posted September 21 Hi, Some time ago, I installed steel joints, cups and driveshafts in DT-03. What I found after just few runs with Sport Tuned motor, is fact that pin at the end seems to have visible wear. Not too much but it happened suprisingly fast. Have I done something wrong or they wear so quick? I used standard for much more time and they look like new. I consider to buy set for TT-02B. They are much smaller so suspension can move in a much wider range. Second thing is fact, that they are made much more precisely. At least in DT-03 I have feeling that wheels wooble less. Am I right, that for some reason steel parts wear much quicker? Price is quite high and availibility is not always great, so it is also factor to consider. Share this post Link to post Share on other sites
TurnipJF 8778 Posted September 21 Did you lubricate them at all, and if so, what with? Share this post Link to post Share on other sites
skom25 632 Posted September 21 No. I left them dry. I ran in dry conditions, mainly on hard surface. Three or four runs on dirt. Share this post Link to post Share on other sites
TurnipJF 8778 Posted September 21 Strange - I run mine dry too, and while the chrome coating wears off quite quickly, the steel itself remains sound for ages even with 13.5t brushless and 2S LiPo power. Maybe you got a bad batch? Share this post Link to post Share on other sites
skom25 632 Posted September 21 I will not even try to make photo, because you will not see anything but I can easily see flat spot on pin. 1 Share this post Link to post Share on other sites
skom25 632 Posted September 21 Maybe you will see something. As I wrote, it is not heavy wear but I am bit surprised. I run it for about 5 hours, maybe bit more. Sport Tuned motor, rather clean conditions. Share this post Link to post Share on other sites
Mrowka 474 Posted September 21 I have broken ujoints, but those were ebay specials on a fast brushless buggy. Share this post Link to post Share on other sites
Otis311 113 Posted September 21 I treat dogbones and drive cups as consumable items. They do last longer on modern cars with hardened steel parts but they still wear out faster than most other parts on the car. I always run them dry. Lubrication tends to attract abrasive debris and also looks nasty. Lube would probably be fine if you cleaned them often. Another cause for excessive wear is running the suspension at maximum extension which forces the driveshafts to operate at sharp angles. 2 Share this post Link to post Share on other sites
alvinlwh 5268 Posted September 21 I do wonder if in your quest to remove all play, had you over shimmed things to the point that they are too tight and ended up causing wear. Share this post Link to post Share on other sites
skom25 632 Posted September 21 No, DT-03 is not shimmed. Just 0.2 or 0.3 mm in axles. There is still a lot of play. I also did not use any orings inside cups etc. In TT-02B I also left some play, to be sure that there is no binding. Share this post Link to post Share on other sites
rich_f 224 Posted September 21 Yes they do wear. When they get really bad you can just punch them out and replace them with a new pin. Share this post Link to post Share on other sites
Wooders28 4545 Posted September 21 Which driveshafts did you get? I've 4 different ones! 2 from 3racing, and 2 from yeah racing.  If I remember right, the 2 outer are 3racing (normal, and heavy duty) middle is yeah racing. The other I have (in my DFO3 atm, but same shafts), is the spring steel yeah racing.   I quite like the 3racing diff joint on the DT03 though, seem a bit harder wearing, didn't think they where that expensive, at around £20 for the diff joints and drive shafts.   They do wear though, same shafts on my DF03..  Share this post Link to post Share on other sites
Big Jon 641 Posted September 25 I have found that genuine Tamiya CVs are of better quality and last longer than Yeah, assuming that the Yeah ones don’t break before they wear out. I’ve also found that operating them at their limits wears them much, much faster. Share this post Link to post Share on other sites
Wooders28 4545 Posted September 25 8 hours ago, Big Jon said: I have found that genuine Tamiya CVs are of better quality and last longer than Yeah, assuming that the Yeah ones don’t break before they wear out. I’ve also found that operating them at their limits wears them much, much faster. Never had one break tbh, but have had the wee grub screw come loose, so I know I remove it from new ones, and put a bit of loctite on it.  The gen Tamiya ones are 3 or 4 times the price (the price looks to have risen the past while), but although last longer, don't think it's 3 times? Share this post Link to post Share on other sites
OoALEJOoO 2775 Posted September 25 Over time cups will wear on their driven edge (clockwise on the right side, anti-clockwise on the left side). You can squeeze some extra life out of them by doing a left/right rotation before the wear is too pronounced. As others have mentioned, the larger the suspension angle, the more wear you will get as the pins slide more on their slots. You can also squeeze some extra life by swapping cups between cars that operate at different suspension angles as the position of the wear zone could be different. Nothing like squeezing pennies out of the hobby 2 Share this post Link to post Share on other sites
Kpowell911 1207 Posted September 25 On 9/21/2023 at 10:37 AM, skom25 said: Maybe you will see something. As I wrote, it is not heavy wear but I am bit surprised. I run it for about 5 hours, maybe bit more. Sport Tuned motor, rather clean conditions. That personally wouldnt concern me after 5 hours of run time 1 Share this post Link to post Share on other sites
