First the transmission, I posted on a thread that folks were seeing that the transmission was not full. (Who wants to check your transmission fluid on a new truck? and it’s hard to check it since you have to gain access underneath the truck) Mine was around 1 quart low. Motor. These motors are pretty solid as long as the right oil is used and that EGR butterfly bolt stays in place. Since you‘ve only had it for 6 weeks you have to take it that the right oil was used. IMO, if you’re getting a new engine and they’re reworking the trans, I’d hang on to it. I had a frustrating round with my 2018 regarding the EGR. Two recalls and a nasty antifreeze leak. Really close to hitting the eject button so I feel your frustration. Right now, my ‘18 is the best truck I’ve every owned and I don’t see myself getting rid of it for a long time. On the other hand, if you’re wanting to get rid of it this seems like a good time to get what you’ve got in it. Good luck on your choice and I’m really sorry to hear that you’re having the ultimate in problems with your 3.0.
Regarding the 2021 vs 2018. There is an issue where the oil filter is not orderable so I’d check that part of it.
Regarding the 2021 vs 2018. There is an issue where the oil filter is not orderable so I’d check that part of it.