what has everybody been doing about this sluggish 4L60E. since about 50k the downshifts seem to take almost twice as long. will a vette servo help this or do i need custom transmission tuning like ls1edit?
07 Sierra CC 5.3L, Airaid MIT, K&N, Borla ProXS, Powerslot rotors, Hawk pads, Vette Servo, Black Bear 93 Oct Tune
00 Sierra RC 4.8L,Volant,P&P TB,Hypertech,Bullet Muffler,Billet Servo,160 T-Stat,LT1 fans,Fastest 1/4 with 150 shot 13.32@101mph *SOLD in 2006*