we just purchased this 09 4 wheel dr around may or june no problems with transmission shifted fine. about 3 wks ago when i would take off between speeds of 30 or more the transmission would shift but ithad a vibration to it. took it to dealer they drove it didnt know what was wrong they said they might have to pull transmissiom then they called & told me that the shop manager that use to be the transmission guy drove it they decided that it needed adjustment to the way u drive got it back was told i may have to drive for about 200 miles it will get better. It hasnt gotten better.i dont take off fast so i decided to try it no vibration if u take off slow it vibrates but it goes through all the gears.