Arrma EXB GP4 29mm Limited Slip Differential

Read Reviews
Write a Review
Arrma EXB GP4 29mm Limited Slip Differential
Back Order Now
You may back order this item and it will ship when it arrives.
$2.99 flat rate shipping! Learn More
Price: $74.99

Please Log in to receive a notification when this item arrives in stock.

Save In List
Note: Manufacturer does not allow coupons
This item earns up to 75 VIP Reward Points Learn More

Arrma EXB GP4 29mm Limited Slip Differential. This optional pre-assembled limited slip diff is a tuning option for your ARRMA 6S vehicle, and can be used in the front or rear position. 

NOTE: Must be combined with ARA310979 - MAIN INPUT GEAR 10T SPIRAL CUT GP4 5mm. 


  • Factory assembled and filled with 10k cSt silicone oil for fast and efficient servicing 
  • Tough steel internal gears for long-lasting durability in all conditions 
  • Stainless steel limited slip diff plates installed for limited slip differential action 
  • Strong composite diff case with integrated steel insert for durability 
  • 43T GP4 spiral cut steel main gear for increased durability under extreme loads 
  • Metal Cross Shafts for increased efficiency 
  • Includes rubber shielded bearings for fast and efficient fit to your vehicle
  • Requires ARA310979 - MAIN INPUT GEAR 10T SPIRAL CUT GP4 5mm


  • (1) Factory Assembled Limited Slip Front or Rear Diff, GP4 43T Spiral Cut Gear and 10k cSt Silicone Oil 

This product was added to our catalog on January 18, 2021

Nick Omalley
Tuesday, Jan 3 2023 (about a year ago)
Arrma EXB GP4 29mm Limited Slip Differential
$70 is ridiculous for somthing that brakes on every other run. The Rcawd ones are on ebay for 35$. They are also metal cased. I've had them in my mojave for 6 packs with no issues ?
stephan labelle
Verified Owner
Saturday, Jan 7 2023 (about a year ago)
Arrma EXB GP4 29mm Limited Slip Differential
I have a newer Kraton EXB and these are the diffs that come on the front and rear. On my Kraton these diffs have proven to be dependable. My Notorious, standing backflips, curb backflips, speed bump backflips, chain link fence double back flips, and never ending using the throttle to flip it back on to its wheels. On my Notorious the EXB diffs have proven themselves tough and have shone no sign of gear slippage under high loads. The EXB diffs out of the bag are set up for the front. To run them in the rear you have to change the order of the slipper plates to make the diff more open. Instructions for this can be found in the Kraton 6s EXB or Outcast 6s EXB manuals online.

I consider Arrma EXB LSD diffs the gold standard for 6s trucks.

Notorious dead sailor list; BLX front and rear ( lots of gear slippage but no broken teeth), Hotracing gears and cases front and rear (they disintegrated fast).