did my 4.10 by myself well me and my dad chiped off a little bit of one of the teeth on the pinon and set them up varley whines how long do you think they will last, since they are not set up perfect and wasn't that happy i think if they do go out i will go with 4.30

 

gears are not suppose to whine once installed so you did something wrong

 

Id get those taken out and new ones put in by a shop.

 

right away... you've unbalanced the gears and not installed them correctly. No whining is acceptable.