Gear Part Numbers

[rubbersidedown]

How can you tell by part numbers between 13 and 15 wide gears and hyvo vrs non hyvo? A lot of gears share the same middle numbers with the tooth size in the number but the prefix is different. I'm searching for different 13 wide top gears.

 

[snowdad4]

non hyvo 13w will be 89J. 15w non hyvo(dont think there ever was a hyvo in that style) will start with 8DF. all the 13w hyvo's will pre-fix 8DW.

 

[rubbersidedown]

Thanks