TLDR Review: "91T Spur Gear Slipper Clutch for Arrma Granite/Senton/Typhon 4X4 550"
Pros
- •Fits perfectly and is ideal for upgrading a 1/10 scale Arrma Granite 4X4 550, Senton 4X4 550, or Typhon 4X4 550.
- •Comes with everything needed for installation in theory, including the 91T 48DP spur differential gear and three pinion gears (17T, 19T, 21T).
- •Aside from material strength issues, the overall design and included components are considered good and visually appealing for the price.
- •The metal gear and spring/nut parts are generally usable and seem to be of decent quality.
Cons
- •The product suffers from poor construction and very low durability, often breaking within minutes or after just a few runs.
- •A critical weak point exists where the pin connects the gear to the slipper clutch, leading to breakage in multiple spots, especially the back end of the spur gear where metal strength is insufficient.
- •Many users report the pin breaking repeatedly and parts not being removable or replaceable easily.
- •The material used is cheap and affects reliability significantly.
- •Missing essential parts like the front bearing spacer and bearings, which are commonly damaged or needed for assembly.
- •The included pinion gears do not fit properly on the motor shaft in many cases, causing issues like parts getting stuck.
- •Motor mount holes and pinion gear sizes often do not align correctly with the specified Arrma models intended for compatibility, making the set unusable without modifications or additional purchases.
- •Significant wobble after installation is frequently mentioned, posing a high risk of rapid damage or failure.
- •Requires buying additional gear parts or switching to another brand for a functional and reliable setup.
- •Overall, poor design and build quality mean this upgrade is often not recommended for serious use or reliability.
Bottom Line
If you want a simple drop-in upgrade for your 1/10 Arrma Granite, Senton, or Typhon 4X4 550, this 91T Spur Gear Slipper Clutch Set looks promising at first glance but disappoints due to fragile materials and compatibility issues, especially with the pin connection and included pinions. Many users find themselves replacing parts or switching brands shortly after installation. We recommend considering other higher-quality or better-fitting gear sets to avoid frequent breakdowns and extra expenses. If durability and precise fit are your priorities, this kit might not cut it despite its attractive price and decent initial design.
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