2004 Mercury Grand Marquis Q&A

2004 Mercury Grand Marquis Question: when the automatic transmission shifts into overdrive it slips

When I drive with overdrive deployed, it will slip when shifting into overdrive and then after the rpms go high enough, it will catch....is there some kind of an adjustment that can be done or do i need a new transmission....Shifting is fine with all the other gears...so i have been driving with the overdrive switched off and all is working well.... -
Answer 1
running low in fluid is the main cause for overdrive failure. there is no adjustment for this. you will need major work for this one Roy -
Comment 1
Thats wrong master tech i have one doing the same thing and my trans oil is full -