This is the Wltoys 12428 Upgrade Metal Rear Differentials.The parts is the Upgrade Parts for the Official Parts Number 12428-0133.This parts the inner Differentials is made of Ordinary metal materials. It can greatly product your Diff. gear. With this upgraded accessory, your remote control car will no longer worry about gear slippage or wear.
Wltoys 12428 Upgrade Metal Rear Differentials Assembly(Ordinary metal materials) and Official Plastic Rear gear box cover,Wltoys 12428 Rear Differentials Parts Replacement Accessories
How to install?
When you install the Metal Rear Differential assembly ,Some guy's Car will run Reverse .Some guys will not meet this situation . when you meet this situation, just reverse the inner metal Rear differential ,then can solve the problems
Also take care of the Red cirucle position on the picture as follow .if the Rear Differential shaft run not smooth ,just use scissors cut those position ,then will run smooth

How to Reverse the inner metal Rear differential ,just like the picture as follow :








These Parts are used for the Wltoys 12428 RC Car Buggy, cross country Wl toys 12428 1/12 High-Speed Racing Car
If you want to buy more parts for this 12428 RC Car,
Please click the link below:
Wltoys 12428 Parts

Now, The Wltoys factory has produced 4 Series for the 12428 Car, which is the 12428, 12428-A,12428-B, and 12428-C.
The internal structure of these 4 products is roughly the same. These 4 cars' outer Body shell is different, and also only little inner parts are different.
So when you choose the parts accessories, like Tires, batteries, remote control, receiving board, hexagon nuts, screws, etc. can all be used in common.
Some special parts you can according to your Car Number to choose parts.
Wltoys 12428-A Parts for The Wltoys 12428-A RC Car
Wltoys 12428-B Parts for The Wltoys 12428-B RC Car
Wltoys 12428-C Parts for The Wltoys 12428-C RC Car