Today I was driving back from NH.. About a 3 hr drive. Getting on the highway my trans would not shift into 4 gear. It's like it was stuck between 3rd and 4th and kept bouncing between the two gears. My speedo was also going nuts as well - bouncing all over the place. I ended up keeping the car in 3rd most of the way home. The trans shifted fine up until the 3-4 shift.
So I get home and let the car rest for an hour or so. Then I go for a drive to a buddy's house and now the trans shifts just fine.. Shifts into 4th and stays in gear. A few hours later while driving back home the trans is a mess again.. This time downshifting to 2nd and back on its own while on the highway. I ended up limping it home as this time it seemed like it was slipping between the 2nd to 3rd shift as well. Sooo, I'm assuming my stock 115k trans is finally toast after all power I kept throwing at it over the passed few years.