Locking a Ball Differential (Reversible method) Locking a Ball Differential (Reversible method)

DM Locking Ball Differential tutorial (10)The following guide will show you how to lock your ball differential. This method is fully reversible if you do not like the behaviour of the locked diff. Many RC Drifters recommend this especially for the rear diff, but it can easily be performed on the front diff as well. This gives users an inexpensive way to lock a diff so that they can make a better decision whether a spool axle is worth purchasing in the future.

For this mod I will be using a Yokomo MR4TC/Drift Package ball diff. Most ball differentials are designed the same way so this method should work for most ball diffs. This will work for both gear and pulley ball diffs.

Step 1:
Take apart the ball differential, then remove the differential diff balls. Store them if you want the option to be able to revert to ball diff, otherwise do what you will with them.
DM Locking Ball Differential tutorial (1)DM Locking Ball Differential tutorial (2)
Step 2:
Find some a rubber type material to sandwich between the diff ring and the gear. This is to ensure that the gear and the diff plates do not slip, a rubber type material is better resistant to movement. I chose to use a thick rubber glove, it is thicker than traditional sterile rubber gloves. It will make up for the space the balls leave out.
DM Locking Ball Differential tutorial (3)
Step 3:
Use the differential plate as an outline to cut out the rubber material to the approximate shape. Make sure to cut a large enough hole in the centre to accommodate the bearings so it does not cause any future problems.
DM Locking Ball Differential tutorial (4)DM Locking Ball Differential tutorial (5)
Step 4:
Assemble the ball diff back together. The differential goes back together with the rubber material sandwich between the diff plate and the gear or pulley. Tighten the differential so that there is no movement. Hold down each side and turn to ensure it is locked in place.
DM Locking Ball Differential tutorial (6)DM Locking Ball Differential tutorial (7)
Step 5:
Now re-install into your chassis and the differential should now be locked. Remember to shim the differential correctly on each side so that it has very minimal play.
DM Locking Ball Differential tutorial (9)DM Locking Ball Differential tutorial (8)

Step 6:
Happy drifting! XD

  • Norshahazwan

    March 28, 2012 #1 Author

    “Assemble the ball diff back together..” did you mean reassemble the ball again or just the diff without the ball?

    Reply

    • DriftMission

      March 28, 2012 #2 Author

      Re-assemble the diff without the balls ๐Ÿ™‚

      Reply

  • Grind Drift Crew

    September 1, 2012 #3 Author

    alright got this now done and all set up waiting to the rain stop outside. as soon as i get to test it i’ll let you know how it worked ๐Ÿ˜€

    Reply

    • Grind Drift Crew

      September 2, 2012 #4 Author

      wow! it worked better than thought…. i strongly courage others to try this ๐Ÿ˜€

      Reply

      • DriftMission

        September 4, 2012 #5 Author

        Good, glad the mod worked for you ๐Ÿ™‚

        Reply

  • Justyn Kace

    October 6, 2012 #6 Author

    It works great. I just done it to my TC3 and it stays locked.

    Reply

    • DriftMission

      October 23, 2012 #7 Author

      nice! thanks for the feedback ๐Ÿ˜€

      Reply

  • Chris Findlay

    April 7, 2013 #8 Author

    wicked trick dude madrat is now locker equipped…..

    Reply

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