holy smokes 400 bucks for a rebuild !id take em in and out all day for that price.the best i could get from anyone local out of like 10 diff shops is 1000,bucks.i install and take it out ,wth.and thats on the 60e s.and red i think you probly could install the transgo kit ,cmon they have directions ,and its all in the valve body ,youlle have it out just put on a table and do it ,looks like a big sandwich.lol.good luck.
mods:2004 sierra ext sb,20s ,big brake kit w,hawk pads,air bagged,2006 6.0 lq4 swap,vortec supercharged10psi, air to water intercooled w/ dual electric fans on it ,snow meth injection kit,60lbers, e-fans ,big radiator swap ,cam 218 /222 548/550 comp .hardened prs .1.85 comp roller rockers ,guideplates ,crane double springs,trans 4l65e built .pacesetter l/ts true duals w/x pipe and magnaflows,14 bolt rearend swap ,3.73s,aroemotive fuel pump system w/elec.fuel controller and bypass regulator a/n fittings, taylor 10.5s interceptor gauge,aem w/b a/f ,autometer boost/vac NELSON 93 OCTANE TUNED .