Arrma 3S BLX Differential Case Set (37T)

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Arrma 3S BLX Differential Case Set (37T)
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This is a replacement Arrma 37 Tooth 3S BLX Differential Case Set. This high-quality Diff Case 37T Main Gear set provides replacement parts for your kit supplied items.


  • Tough composite material for durability and consistent performance under extreme operating conditions
  • Precision manufactured gear tooth configuration for smooth and trouble-free gear operation
  • High-quality diff case molding ensures a reliable diff seal
  • Integrated ring gear and diff case for strong construction


  • (1) Ring Gear with Integrated Diff Case
  • (1) Diff Case Cap


  • ARA310873 - HD INPUT GEAR 13T (1pc)

This product was added to our catalog on October 11, 2018

Kapena Kukonu
Verified Owner
Sunday, Jun 26 2022 (about a year ago)
Arrma 3S BLX Differential Case Set (37T)
It was not hard to replace. I stripped my original stoker by tightening my slipper clutch too much. Decided that if I had to replace this part and other composite gear parts that the cost of upgraded metal gears are not worth the cost. And there is also the possibility that if you do use metal gears that other remaining composite gears will be a weak point