M22 Muncie. I hate powerglides, TH350 are too weak for a 427 and TH400 won't fit. Remember this is a GTS327 type 1 in Warwick yellow. One of the first 3 or 4 made. So I don't want any floor or tunnel mods. Muncie is the only one that will fit. I still have the 3.5:1 XY GT-HO 9" that came with the red car so i'll use it until it breaks, and replace with a Moser 12 bolt that won't break.