Originally Posted by Deuling
In my k5 when i had 32s I ran in 4lo all day long. But... I have 3.73 gears. If you have 4.10s I think lo gear is too low with 31s and you won't get enough momentum.
4lo takes more load of the trans
I got the D44 rear (3.73) and still have the 31s, it should be fine