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Hi there im new to this but just wanted to discuss a problem ive had with my ford falcon fg 2009 with a auto zf6hp26 transmisson, so its my partners car and shes been driving it for a couples weeks noticing it making a werid rubbing sound now and then around 50-60km/h and now it got worse by it surging when in second gear in between 1-2 revs would rise and go down quickly , I took it to a transmisson specialist and he told me theres a 5% percent chance it could just need a service or its pretty much had it but he was pretty certain on it being done , now I myself like to work on my own cars other then paying thousands of dollars so I was going to do a whole transmisson swap so I got a hold of a second hand one in good condition and low kms for cheap . My friend told me to check the level of the transmisson oil so I took the filler plug out and very milky oil started bursting out . Firstly im thinking how is there water mixing with it and it shouldnt be so full so I let most of drain out till its at level with filler plug . I check my radiator water just to make sure and then theres milky substance in there aswel . It should be super clean cause I only just done a flush and fill on the radiator a couple months beforehand. I look online to find out where the water and oil are close together and I find out its the only part I know to my knowledge is the heat exchanger, so I go ahead and replace that with a second hand one I got with the trans and with the old one I try pressure the hose through the radiator input on the heat exchanger and block the output one to seen if water comes out of the oil lines . No water came out of the oil line so im guessing it must only happen when its under heaps of pressure and very hot if its not that then there must be another meeting point were the trans oil and water meet ? But any way I got rid of the milky water out of the radiator and topped it up with coolant and left the milky oil in the trans and took it for a drive it drove way better and stopped surging so I might try doing a drain and refill on the trans till it runs clear then service . But im only hoping it works . Sorry about the big story but itl be better if I said everything , if any one can help or give me tips on this il be greatly thankful as I dont much but trying and trying to do this on a low budget

Hi there I wanted to discuss a problem ive had with my ford falcon fg 2009 with a auto zf6hp26 transmission after swapping with a second hand one , so me and a mate done the swap of transmissions and we swapped the tcm around aswel , now im getting a system coms fault and ive had a friend come in and scan it with a proper scanner tool and its saying it a shifter module fault ? he has tried to clear it but it just pops up again . has anyone had this problem or know the solution ? thanks in advance