J-mod questions.

hey

so i've been hearing about something called a j-mod for my transmission. could someone tell me what exactly a j-mod is and about how much it would cost? thanks for any help
bye

j-mod stands for jerrys mod it costs almost nothing and allows your car to shift better heres the write full write up

http://www.tccoa.com/articles/tranny/shiftybusiness.html