i've two little coolers installed in front of my radiator as the 'v'-shape. i don't know what GVW is. (it came with the car) there's not too much delay in shifting to 4th.(when is abt 35F). recently is about 13F, i noticed that the car took 1,2 mins longer to warm up. usually, i drove after a while, it'll shift to 4th naturally.
PS:it's indeed from the same family. weather's getting lower and cold as 12F, my 'brake light' sometimes couldn't go off and came on.
eh, it's not a big deal. didn't pull the brake, back wheels didn't lock up.
