Have a 2004 Endeavor (135,000), this summer experienced the "shutter" while the truck was trying to shift around 30 miles an hour. Had the fluids replaced by the dealer and after a few miles the problem was fixed.

Now, it's winter and after the truck sits over night it has to warm up for a while before the transmission works correctly in drive. Does anyone know the problem and/or the fix for it. Any estimates on the costs?

Thanks for any info.