no comment i just need the answer where is the number one spark plug on the 307 distributor cap
get an abs dianostic scan at an auto shop.
On my "99" it is 17 MM. I've never changed a seal.
It keeps the spider gears spread apart , to mesh to the Differential output shaft gears ( 2) , one on each side of of the spider gear set , inside the Differential Housing .
What I was trying to find was a Modification to a Traxxas Rustler / Nitro Sport Diff ,
that you took a longer pin and cut it just a small bit longer , which in turn , is suppose
to force the spider gear teeth ( further ) into the Diff output shaft , gear teeth , for better tooth contact area , hence .... less gear tooth breakage .....maybe last longer also.
If you didn't put it back on right or maybe left something off like the rotor, sure.