1997 MountaineerTransmission high shift

[jtre]

177k miles...lately my 1997 Mounty has been shifting real high. When I accelerate from a stop, it reaches about 4k RPM before shifting (much higher than usual), but maintains about 25000-3k or so depending on the speed I am driving. It seems sluggish to get through 1st gear. Any one ever experience a similar issue. I have had this issue intermittently in the past, but now it seems to be becoming more frequent. It also seems to be associated with a higher than normal idle, a bit above 1000 when hot

 

[toypaseo]

Check the transmission fluid level.

 

[Mbrooks420]

OD light ever flash? Does it drive in manual second from a stop?

 

[boominXplorer]

Of course check the basics but the 1-2 accumulator spring will commonly break and cause late shifting.

 

[Turdle]

Late upshift combined with high idle says your Throttle position sensor might be crapped out. If it is reading higher than 1v at idle I'd replace it.