how can i lock up my xmods differental but with something i can remove if wanted pics would be nice

I don't think you will be able to get any responses... Here it is hobby grade vechiles...

i knew that but theres people that mess with toys r us cars that post here as well

Hot glue?

use silly putty. it's silicon based and can be mixed with a small amount of diff oil to make it more manageable. I use it on the center diff on my buggy. Works well and is removeable.