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thats what the shop told me i didnt ask what he met but ill try to find out. they added some type of lube that cost me 29.00 they said the fluid doesnt really lube the trams enough .
I'd worry about that "lube" that they added. The 4R100 takes Mercon only (not Mercon V). I understand that Mercon V has a lubricant in it that helps with shifting but that is not a good thing with the 4R100. I am by no means a tranny expert, so don't panic with my word, but I'd do some investigating. I had a shop put Mercon V in my tranny because the bottle said it was for Ford cars and trucks 1998 through current or something similar. My manual & dipstick both are marked "MERCON" I got the Mercon V out ASAP!!