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I upgraded my ecx amp with a leopard 3300kv brushless motor setup and shredded my stock plastic gears. The new metal gears work great and I expect them to last a long time. Unlike the stock plastic gears you need to put a little lithium grease in the tranny or they make some noise plus it adds to the longevity of the gears. Great product, very happy.......... I wrote this original review about six months ago or maybe a little longer. Since then i have gone through 2 metal gear sets. for some reason the teeth on the differential keep tearing up. The other gears seem fine but unfortunately you can not just buy the differential seperately. Strange thing is i put the original plastic diff. back in just so i could run and it is still in there. No problems at all so i have been running metal and plastic together all this time..... Very strangeRead full review
Verified purchase: Yes | Condition: New
While this gear set is a little heavier than the stock plastic gears, it offers solid reliable performance. The middle stock gear stripped within only a few uses, and these have been a welcomed upgrade for an ECX Amp MT. Honestly, this is what should be shipping inside of the units as stock, since the plastic gears are so weak. Anyway, definitely worth the few bucks.
Verified purchase: Yes | Condition: New
exactly as described heavy duty metal gear set. i run mine locked on the street at high speed, in dirt and gravel, rough grassy fields everywhere and my truck pushes close to 100 mph. no problems at all works great!
Verified purchase: Yes | Condition: New
We upgraded the ECX amp to a brushless Castle system. The stock plastic gear set literally stripped in less than 5 minutes. I realize the plastic set keeps the initial cost down,but it will bring the fun to a immediate halt. It's not that big of a deal to swap,but I would do it before or at the same time as a brushless LiPo upgrade.
Verified purchase: Yes | Condition: New
Went 3s on the 4730kv with a 35t pinion stroking a 85t metal spur. 55mph. No more damaged transmission, but the drive shafts keep snapping at the wheels. Upgraded time.
Verified purchase: Yes | Condition: New
