at what speed should my 1994 geo prz change to high gear
all auto transmissions are different, But generally a transmission in good order will shift between 2-3k rpm's. Watch the rpm gauge and if your shifting well before the red line your car is fine. I have noticed as speed increases it takes longer for the car to shift to its next gear but if your not having issues i would say its fine.
Search Geo Prizm Questions
Geo Prizm Experts