Im sorry for this but what do i have to change with me gears are 3.21 to 4.88 do i have to change carriers.

 

Interestingly enough, those of us who have swapped from 3.21s to 4.10s or numerically higher have had different results. I did not have to change carriers going to 4.10s nor have most folks here but, I have read where a few have had to, at least according to the shop that was doing the work. Maybe they were after some extra $$