Yes, my 6speed trans has a one piece axle.No the 4 speed does not,as I havent purchased it yet.I can figure out the ratio ,if I had them both here, unfortunity the 6 speeds at the paint shop with the rest of the mower,(getting a fresh new winter coat after last season)and althuogh I know my ratio,moter to tire,I never thought to check axle only,dont want to buy a transaxle if I cant make it work.The point was to have two to swicth back and forth to keep the lube full and fresh.Even if I dont use the higher gears on the six speed. Just want to keep my 7.5 to 1 constant from one to the other.Thanx anyway, guess we'll just have to expirament.TB