Originally Posted by
danosborne661
Hello all! New around here to Tamiya Mini's (well, after last running a Mini about 15 years ago!)
Is there a recommended diff I can fit to my M03? Can the newish Yeah Racing one be fitted with some modifying? If not maybe blue tack in the standard diff will be the next best option!
Also do the fast gears fit the M03 ok and a worthy upgrade? I'm running indoors on a high-grip carpet track with hard Shimizu's all round btw

TA03 ball diff, or just add a couple extra of the large washers to the gear diff and use some AW grease. The Yeah Racing diff won't fit without some serious custom fabrication.
Most speed gear sets are a waste of time as they're not durable.