Won't go passed 3rd gear when tranny is hot.
 

My 08 Pacifica has a 6 speed transmission and I noticed on long trips and driving around town for any length of time without turning the engine off, will not go passed 3rd gear unless I use the Autostick. While driving around town with friends for an hour or more non stop, I had to use the auto stick continually to get into 4th gear and above. If I let the engine cool for 30 - 40 minutes the problem goes away until hot again. Any help out there?

Check the level and condition of the fluid to start. If that turns out okay, then you need to get it to someone with a sophisticated code reader to look for error codes stored in the trans computer. Not any code reader is capable of digging deep into the trans. A good transmission shop should be able to do so. Those code readers are expensive so they will probably charge you a diagnosis fee. Some shops will eat that if you choose to have them do the repairs.

I did find a TSB related to shift improvements. I've pasted the details below. Let me know if you have any questions.

TSB NUMBER: 21-002-09
GROUP: Transmission
DATE: January 21, 2009

SUBJECT: Flash: Automatic Transmission Shift Improvements

OVERVIEW: This bulletin involves flash reprogramming the Powertrain Control Module (PCM) with new software, Clear the Variable Line Pressure (VLP) Counters and Perform the Quick Learn function.

MODELS: 2007 - **2008** (CS) Pacifica

NOTE: This bulletin applies to CS models built with a 4.0L engine with a 62TE
automatic transmission (Sales Codes EGQ and DG2) or a 3.8L engine
equipped with a 41TE automatic transmission (Sales Codes EGH and DFF).

SYMPTOM/CONDITION: The vehicle operator may experience one or more of the following symptoms:
i. **Complaints of overall shift quality (All transmissions)**
ii. **During a rapid coast down while braking a bump may be felt just before a
stop**(All transmissions)**
iii. **1 - 2 upshift Improvement (41TE transmissions)**
iv. **3 - 2 - 3 change mind shift bump (41TE transmissions)**
v. 3 - 2 kickdown bump or harshness (62TE transmissions)
vi. Too sensitive accelerator pedal response on initial tip in (squeal tires)(62TE
transmissions)