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410 2.0 Hi anyone else have a problem with the differential pinion gears? I have less than 2 hours drive time on it. The pic is the front & rear gear & new

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teknofan66

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gears 3.jpg
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No. No problems yet.

That machined diff pinion gear is meant to be used as a set with machined diff ring gear.
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I'm pretty sure you'll have to modify/extend flat spot on shaft where the set screw goes.
 
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Are you running 2S LiPo packs on your SCT410 2.0 ride? If I had to take a guess, I'd say the on going full throttle landings, in attempt to keep nose up flight attitude, are a big issue with the stock (casted?) diff pinion gear not being as strong as it could be.

I know it depends on how fast I'm going and/or which side of the jump I'm hitting, as to how much energy my SCT's tires have on landing. Finding that right moment to let off the trigger finger can be a hard thing to do when things are going south and trying not to let things get further out of control.:p:giggle:(y)
 
I am running 2S LiPo packs. I have been running the SCT410.3 for years without any gear problems. I guess what I want to know is why Tekno would start putting clearly inferior gears in their kits now. That is nonsense that you have to put the old gears in to get a durable truck. I hope they will reconsider their decision to sell these gears. Two other people at the one of the tracks I go to have had this problem. Thanks for tips on using the old gears.
 
If memory serves me right,teknofan66, the SCT410.3 had a MAP price greater than that of the new SCTs. We all know the answer to keeping prices enticing enough for the general hobbyist, and manufacturer still being able to make a profit. Everybody is squeezing those last drops, tightening their belts.... I'm sure it's a tough call for Tekno to decide on what parts in kits get the shrinkflation treatment.

Quality assurance could be an issue that needs rectified? All I can say is, you got to let Tekno know what is wearing out/breaking on the new kits. The same goes for every RCer and every RC product manufacturer communication.
 
Man that really sucks I was thinking of getting the sct. But might by a Mugen instead.
 
The powdered metal gears and pinion are for sure lower quality parts, that being said, if you can fit shims on the output shaft bearing pushing the ring gear closer to the pinion it’s worth a try. I put two on the ring gear side of mine, but I used the tkr5151 and tkr5152 machined steel combo, I didn’t try the kit parts.
Like others said it’s got to be a pair though, ring and pinion same material.
I metaphorically threw away 64$ worth of tkr5153m/tkr5154m to use 100$ of tkr5151/tkr5152 parts.
Another 9$ in tkr5149m plastic cross pins to use 15$ tkr5149 steel cross pins. They are all in a ziplock bag probably till the end of time or I sell the truck.
I would have gladly paid the extra 52$ difference in the kit to get the machined gears and steel cross pins in the first place.
And few more dollars to get a decent delrin shock piston and machined shock shaft guides.
Has anyone noticed that the 4mm chassis screws are no longer stamped 12.9 grade steel like the 1/8 scale Tekno kits have?
 
I am running 2S LiPo packs. I have been running the SCT410.3 for years without any gear problems. I guess what I want to know is why Tekno would start putting clearly inferior gears in their kits now. That is nonsense that you have to put the old gears in to get a durable truck. I hope they will reconsider their decision to sell these gears. Two other people at the one of the tracks I go to have had this problem. Thanks for tips on using the old gears.
It simply comes down to cost. The metallurgy gears are a significant cost savings. Are they as durable as fully machined steel gears? Of course not, there's no way they could be. Having said that, they are still extremely durable. We tested them on 4s with 8th scale power and they held up fine. I think the problem is that the metallurgy gears require the mesh to be a little more precise whereas the fully machined gears can survive a pretty loose mesh without issue.
 

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