When you put it into high gear then hit the gas it will kinda hesitate then clunk into gear it only does it every now and then just wondering whats up with it every other gear works fine??

 

The first thing I would do is check your front and rear diff fluids.

 

Its not coming from the rear diff and it doesnt seem like its the front either.

 

Its not coming from the diff's though cause in any other gear like low or reverse shouldnt it still do it?

 

it may just be slightly out of adjustment. you can tinker with it for your self if you want,pretty easy. What i do with mine is put it in gear then just tap the throttle and it will kick in(you can see the gear shifter jump forward) then your good to go.