1998 Lincoln Navigator Q&A

1998 Lincoln Navigator Question: My 1998 Navigator seems to vibrate/sputter a little as the gears are shifting.

This seems to occur when I am driving at speeds of 40-45 miles per hour. What could be the problem? -
Answer 1
scan codes and post so we can adv -
Answer 2
when is the last time it's had a simple trans service( not flush) , just drain & fill &filter if needed? With FACTORY fluid. -
Comment 1
Hmmnn... good question and never thought about that...I think it's been a long time since I have had the transmission fluid drained and the filter changed. May need to do that since I have 198,000 miles on it! -
Comment 2
Don't flush it! Just a drain & fill as I previously mentioned. Good luck. -
Comment 3
ok many thanks again for your help! -