EXCESS PLAY IN DIFF PINION

I need help.....I have excess play in my rear diff pinion...looking to upgrade
my ring gears while fixing issue. I have 3.73 in now. Called 4wheelparts, only thing available is 4.56. Wanted to know who else has had this and if it will work, problems?, how will affect my speed, rpms at highway?

2006 Prerunner trd sport 4x2-6-inch pro comp lift, 35inch tires
thanks

 

Well you're a prerunner so you dont need to worry about matching your rear diff with the front diff. & seeing how you run 35"'s I'd think the lower ratio would be a better fit... but no issue really

 

yeah the 4.56 will be good for the 35's