Re: Trans fluid change: What else to do?

Posted by Tim Cole On 2012/5/1 18:31:36

On the subject of fluid condition let me add this note pertaining to Mopar ATF+4

a) The red fluid color is from dye to distinguish it from other oils
b) Mopar ATF+4 and Mopar Power Steering Oil + 4 are the same product and interchangible
c) The color of the fluid may change to brown with use and color is not an indication of fluid condition
d) The odor of the fluid may change with use and is not an indication of the condition of the fluid

These are actual service guidelines from Chrysler. So aside from listed maintenance intervals the only recommendation to replace the fluid in a Chrysler is when the transmission is changed or if there are symptoms.

Now of course, modern transmissions have good filters. The Ultramatic doesn't and would benefit from an add on. But, once the car is parked for a week there is a alot of settlement which is probably why they seem more reliable today than when they were being driven all the time. I doubt that "modern fluids" have much to do with it.