Vehicle is a 2003 Neon with 2.0 L 4 cylinder engine and 4 speed automatic, 40TE transaxle. Engine has 207,000 miles and transmission has about 100,000 miles since last rebuild.
I removed the transmission / transaxle pan, l drained fluid, replaced filter with Wix brand. I added about 5 quarts of ATF+4 fluid purchased from Advance Auto. I also flushed 4 additional quarts of fluid through the radiator transmission cooler. Fluid is at the proper level on the dipstick. It is half way between the add and full mark for fluid at operating temperature.
Now after this transmission service the vehicle exhibits what I believe is called bump shift. When slowing to a stop from 40 mph or greater and when the vehicle reaches about 25 mph there is a noticeable bump or jerk or some harsh downshift in the drive train. This behavior was NOT present before the fluid and filter change. Can a fluid and filter change cause a harsh downshift? If this shifting behavior is caused by the fluid, that would mean that there are some slight differences in the formulation of ATF+4 among different vendors or Advance Auto is fudging on the formulation it is using??? Has anyone else experienced such behavior after a fluid and filter change on the Chrysler 4X TE transaxles? Do I need to do another fluid flush with a different vendors ATF+4 fluid???
I removed the transmission / transaxle pan, l drained fluid, replaced filter with Wix brand. I added about 5 quarts of ATF+4 fluid purchased from Advance Auto. I also flushed 4 additional quarts of fluid through the radiator transmission cooler. Fluid is at the proper level on the dipstick. It is half way between the add and full mark for fluid at operating temperature.
Now after this transmission service the vehicle exhibits what I believe is called bump shift. When slowing to a stop from 40 mph or greater and when the vehicle reaches about 25 mph there is a noticeable bump or jerk or some harsh downshift in the drive train. This behavior was NOT present before the fluid and filter change. Can a fluid and filter change cause a harsh downshift? If this shifting behavior is caused by the fluid, that would mean that there are some slight differences in the formulation of ATF+4 among different vendors or Advance Auto is fudging on the formulation it is using??? Has anyone else experienced such behavior after a fluid and filter change on the Chrysler 4X TE transaxles? Do I need to do another fluid flush with a different vendors ATF+4 fluid???