Parts/Drivetrain/Differentials & diff parts/Arrma 3S BLX Differential Case Set (37T)
Arrma 3S BLX Differential Case Set (37T)
Arrma

Arrma 3S BLX Differential Case Set (37T)

Part # ARA3108725.0(1)
Where to buy
$8.99
AMain Hobbies
Seen Oct 12, 2026
$8.99Buy
Prices are as last seen at the store; stock is not tracked.

About this part

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.

Features:

  • 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

Includes:

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

Requires:

  • ARA310873 - HD INPUT GEAR 13T (1pc)
CA Residents Prop 65 Warning WARNING: This product can expose you to chemicals including Di(2-ethylhexyl)phthalate (DEHP), which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov Details...

Reviews5.0 · 1 review

Kapena KukonuVerified owneron 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

1 found this helpful

Builds using this part

No builds use this part yet — add it to yours from the build editor.