New Transmission Gears
 

Im thinking about upgrading to 4.16 gears, will it affect my transmission in a negative way or a good way? Its the original transmission, and its a 95 F-150 V8 5.0L
And will I see more power and touque or just power?
And, will putting new gears in save me from having to replace my transmission later?
Please let me know, i need all the advice i can get on this 1.
Im 17 and paying for all my truck stuff as well as my truck, and trying to learn mechanics as best i can.
Thanks in advance,
-Nash