So, when I drive my wrangler, specifically on the highway and it shifts into overdrive there is a strange vibration. It is worse when the car is under load going up hill or with multiple people in the car. It seems to happen right when it shifts into overdrive at 55mph turning around 2300 RPMs. Especially going uphill is when this happens. I changed the tranny fluid out at 65k and I have 72k on it now. Could it be the rear tranny mount? I have 1 year and 8k miles left on my CPO warranty, but when you bring it in it is a minimum $150 to have them check it out. Hoping to have the problem diagnosed so I can check to see if that is something covered under the warranty.