牙差 is NOT 神話, it save me a lot of time in past 1.5 years.
The real good 牙差 is it last for almost 1 year since Aug 2010 with my 416x until now.
And real good 牙差 is just assemble it without special technique and skill
我想問吓牙差用唔同嘅油有乜唔同效果呢?跟車(TA06)嚟係900,唔知得唔得嘅呢?<=== The diff will be tighter if you use thicker diff oil. I personally use a thicker diff oil to cope with a more powerful motor. Otherwise the car will spin