Hi
i have 4L60E and i want to upgrade it to handel at most 450whp

Some local store offer this kit
Red Eagle belt, Hi-per blue pistons,Borg Warner clutches,Sonax oil pressure booster, GFX clutch pack


Would it handel the power? If not what sould i alter or add
And thinking of adding corvette servo


It will be on 99 silverado 1500 RCSS NBS

 

I’d add beast sun shell, upgraded out put shaft Sonnax valve body kit and super servos. put the smaller drill size in the plate Sonnax adjustable shift pressure set up and hd 2-3 shift

 

I'd use the Sonnax shell rather than the Beast (although for the moderate power you're talking about, either is OK, can't go wrong either way), and DEFINITELY the Vette servo. Also the Transgo shift kit. Follow their instructions about notching the servo. The Sonnax roller thrust bearing kit to replace the thrust washers. A NEW input drum, because the band rides on the outside of it, and it almost always ends up warped. Find a 65E if you can and get the 5-gear planets out of it. Replace ALL the bushings. Look VERY closely at how the reaction carrier shaft fits into the input gear; replace both if it's not tight.