i want to designe a gearbox on catia , i want to pdf of assembly of gearbox with dimention....plz help anybody????

Could you possibly be any more vague? Honestly, how do you expect people to help when you give such little information? Idiot

I have a picture for you!

Or this pdf
http://nptel.ac.in/courses/IIT-MADRAS/Machine_Design_II/pdf/2_17.pdf

Here are all gearboxes technical supports

http://www.drehmo.com/en/downloads/dimension-sheets/gearboxes.html

Good luck!

Answered with a tutorial: https://grabcad.com/tutorials/i-want-to-designe-a-gearbox-on-catia-i-want-to-pdf-of-assembly-of-gearbox-with-dimention-plz-help-anybody

What do you what exactly. Showing single part and asking for gearbox. Dint understand. If drgs are available i can build in 3d.
subjected to payment terms.

To design a gearbox from nothing is not such a big deal, just get your own specifications on a paper and your calculator ready.
(sorry for my english, better in french if you want more explanations)