ok about month ago i picked up a used hughes transmission with converter everything looked good with the trans

i've been driving the car for about a month and about 2 days ago i noticed it started slipping trans temp was about 160* and the color and level was perfect in the trans.

it got to the point if i gave it any gas the rpms would climb but very slight movement and i could'nt even feel it shift. 1st to 2nd shift felt ok beyond that i could'nt feel it shift. i have been reading that it's probably the 3/4 clutch or tv cable not adjusted

can i just get a rebuild kit from hughes and that would fix it ? and would it come with the 3/4 clutch?

thanks