HYPER GO 16420Y Powder Metallurgy Differential

About this spur gear

A differential that has started to click is already losing drive, and on a four wheel drive chassis that shows up as a car that pulls to one side under power. This one comes built, so the job is the gearbox halves and not a bag of pinions and shims on a kitchen table. It runs with the 16401Y spur set, and it is worth changing both if the truck has done a hard season.

Where it sits in the HYPER GO RC car range

The 16420Y is part of our Drivetrain, Gears & Axles shelf, which carries 6 parts for the MJX HYPER GO range. Model code 16420Y is the number every listing here is keyed to: quote it and the gears, shocks, wheels and bodies that suit this chassis all line up. It is a service part rather than a vehicle, so check the fits row before you order.

Fit and compatibility

This part is listed against the chassis named in its title. Those codes are stamped on the chassis plate under the body; photographs are a poor guide at this scale, because neighbouring versions differ by a couple of millimetres and look identical. If the plate on your car is unreadable, send us a picture with the shell off and we will tell you which version you have.

Living with it

Set gear mesh with a strip of paper between the teeth, tighten, then pull the paper out. Replace shafts in pairs across an axle so the car tracks straight under power.

Specification

Questions about the 16420Y

How do I know this is the right part?

Go by the model code on the chassis plate and the fits row above, not by the photograph. Drivetrain parts differ by a couple of millimetres and look identical in pictures.

Do I need to replace the pinion as well?

If you are replacing a worn spur, yes — they wear as a pair and a fresh gear against a worn pinion will whine and fail again quickly.

Is the differential serviceable?

It is supplied sealed and fitted as a unit. We do not sell the internal gears separately.