For a service department of a Jeep dealership, they show remarkably low understanding of the work required, and seem to be geared towards maximizing profit at the expense of the customer. There's no confidence that the service department is knowledgeable enough, or even honest enough to work on problems slightly more complex than an oil change.
If you are willing to give them any work, even under warranty, make sure you check all paperwork and double-check if the repairs are necessary and carried out in full. I know, this is asking a bit too much from an average person, so my suggestion is to avoid dealing with them altogether.
I own a JKU 2011 with manual transmission. At approximately 39000 miles, while the vehicle was still under warranty, I brought it in with a concern about a noise pertaining to the clutch. The service department has "diagnosed" the problem and suggested to replace the clutch. Thinking "this is a Jeep service department, so they must know what they are talking about" I have agreed to the replacement. Alas, clutch components are not covered by the warranty, so the expense came out of pocket.
One and a half years later, the hydraulic system of the new clutch has failed. It turns out the service department has replaced the slave cylinder, but kept the original master cylinder. Sigh...
Another two years go by, and now at approximately 78000 miles there's noise coming from the clutch again. This time I took it upon myself to look up the symptoms, and found a specific TSB describing the exact problem. The gist of it is that NSG370 transmissions have a design flaw that doesn't put correct pre-load on the throw-out bearing; the correct pre-load is achieved by adding some washers and whatnot.
Albeit the vehicle no longer under warranty, I brought it in for diagnosis. While describing the problem, I've shown a printout of the TSB to the service advisor, and was told that when the technician will be performing diagnostics, any and all relevant TSBs will come up, so there was no need for my input at the time.
Alas, the final diagnosis has disappointed. The found problem was generic (i.e. "throw-out bearing is bad"), no mention of any TSB. The suggestion was to replace the clutch. Again... Except this time it is almost 1.5x times more expensive.
1. Notwithstanding the need for the original clutch replacement, the job was not done professionally.
1.1. When hydraulic clutch components are replaced, it is advisable that both master and slave cylinders are replaced at the same time; because one of the cylinders was not replaced, the hydraulic system has failed.
1.2. The TSB in question should have been implemented with the original clutch replacement, as this is a known design flaw of all NSG370 transmissions.
2. The most recent diagnosis is failing to take into account specifics of the problem, opting for a generic description, and excessive suggested repairs.