I resect your responces on many posts on this forum but I disagree with the need for a star scan. ALL tranny fluid expands when heated , all types , synthetic and regular oil. .All cars for the past 60 years with automatic trannys that CAME WITH dip sticks always had a cold , warm and hot level. This is not rocket science, and proper procedure for checking the level was always on a FULLY WARMED UP tranny. To reach a fully warmed up tranny it must be DRIVEN for 20 to 30 minutes at highway speeds, thru all gears.Now we come to our cars and a dealer tech does not have 30 min to waste warming up a tranny to check the level. Labor time is MONEY. He plugs in the star scan gets the tranny temp and cross reference to the temp chart and he gets the miller dip stick and has the level in 5 min labor. Any do it your selfer has the time though to fully warm up the tranny, so a star scan is not needed. A do it your selfer HINT , 2007 and newer have a thermostat in line with the tranny cooler. It opens at 160 F . When you feel warm tranny fluid flowing at the cooler on top of the a/c condencer you know your tranny is at the point of fully warmed 160-180 F. This brings me to my testing with my Mlller dip stick, I have gotten readings of 30MM cold, 50MM warm, 70 MM hot (a fully warm up tranny.) The Miller dip stick or Mercedes model is needed but not the star scan if you change your own tranny fluid.
so with your method you are @ 70mm at full tranny temp (which should be 167 - 171°F)
as such you are over filled by approx 5mm according to the Service Manual Specs.
5mm is not a lot, but as stated in the SM:
6. Check transmission oil temperature using the appropriate scan tool.
Note: The true transmission oil temperature can only be read by a scan tool in REVERSE or any forward
gear position. (Refer to 21 - AUTOMATIC TRANSMISSION- NAG1/TRANSMISSION TEMPERATURE SENSOR/
PARK-NEUTRAL SWITCH - OPERATION)
I attached it for Steve to review....
I don't disagree that you can do it yourself - I personally won't; more now than ever because of what occured when the dealer tech screwed up..
and just FYI, the dealer is supposed to preheat the ATF to approx 80°C (i.e. 176°F) prior to pouring it in, as is the correct procedure according to Chrysler.
and any Scan Tool with Chrysler NAG1 Support can read the temp of the transmission (but only when transmission is in Reverse or Forward Gear, Park or Neutral closes the sending unit and the scan tool returns the Coolant Temp, not the transmission temp)