Yes--the Ask to aks is currently a characteristic of Black English-- but this is just a sub set of rural american english-- that includes Purty (or pertty, or any other varient spelling for Pretty)-- and YCLU the term for this sort of shifting of sounds.. i thought it was interesting, but not so interesting that i remember the term..

some other thread (or is it the beginning of this one.?) points out Brid-- has changed into Bird by the same process.

and curiously, to my ear I say Juring for During..but when i did an informal survey-- most people heard me say during-- yet i hear the sound as very different.. but not quite as changed as "Did you eat?" is in the expression "Jeet?" (but Jyeet might be a better spelling..) but getting there.