yay! Another problem!

[Oscar]

ok problem number 2, i think my gearbox maybe fubar, its an auto, when its cold, and sometimes when its warmed up, 2-3 and 3-overdrive it dosnt want 2 change, revs go up speed only slowly increases, and it feels like its gona hit 8k rpm before it wants 2 change, also when its cold if u put it into drive it stalls like if u bring up a clutch, the weird thing is when the problem occurs the voltage rockets up 2 around 15.7-9 v.