i have a 1991 dodge ram truck the transmission is the A-518 automatic, my transmission was fully rebuilt about 500 miles ago. on my recipt it shows i was chrged for 15 qts of atf+3, when i went to find +3 for a back up quart i was told it doesn't excist anymore and the its +4 that i need, so i called the transmission shop and he said you can put +4 in it if it ever gets low. now when i first called the shop before i ever dealt with the owner one of the mechanics told me that they used a global atf that was ok to run in any automatic transmission except for some ford transmissions that called for type f, so being told +3 dont excist im pretty sure my brand new rebuilt transmission has a global atf of some kind seems how the mechanic him self told me thats what they use. and im pretty sure its the oreilly brand global atf because i seen oreilly labeled oil and transmission bottles all over there shop when i went in there, should i be flushing my transmission asap and putting +4 in it? or is the global atf ok to use? i find it hard to believe that the transmission shop would put global in it and give me a two year warranty if it could damage the transmission, specially after a master rebuild, so i dont know should i be ok to continue driving with whatever global atf is in it and when it comes to change the fluid should i get oreillys global atf or should i flush it and put +$ in it? i also heard the wolfs head is a global atf and from what i have read ppl love it and have had no problems, i dont know alot about atf so thats why im asking, im also a new member so bare with me if my questions seem stupid, thanks to everyone with input.