You can change brands without issues.
Interestingly, someone on here maintained a fleet of vehicles for their company, and did a lot of tests with UOAs. They found the one with the best UOAs wasn't dependent on conventional or synthetic, it was about which one stuck with the same brand for a considerable period of time. So there's some circumstantial evidence that it's better to stick with one brand. However, I've never heard of an engine having a problem and the issue being linked to switching oil brands often.
So use whatever oil you want. As mentioned, just make sure it's backed by a reputable company.
Though I question if the engine oil is going to affect the issue you're experiencing. Any thoughts to what you plan on doing next if the engine oil switch doesn't change anything? Any thoughts about doing another drain and fill on the transmission, this time with some Motorcraft?
Interestingly, someone on here maintained a fleet of vehicles for their company, and did a lot of tests with UOAs. They found the one with the best UOAs wasn't dependent on conventional or synthetic, it was about which one stuck with the same brand for a considerable period of time. So there's some circumstantial evidence that it's better to stick with one brand. However, I've never heard of an engine having a problem and the issue being linked to switching oil brands often.
So use whatever oil you want. As mentioned, just make sure it's backed by a reputable company.
Though I question if the engine oil is going to affect the issue you're experiencing. Any thoughts to what you plan on doing next if the engine oil switch doesn't change anything? Any thoughts about doing another drain and fill on the transmission, this time with some Motorcraft?