Transmission shifting at high rpm ?? Why ??

SeashaAnn · 2017-01-31T00:00:22+00:00

I have a 94 4Runner four wheel drive V6 and my transmission won't shift until I get to about 4000 RPMs in each gear, and to get into overdrive I have to do almost 70mph. it's causing me to run at high RPM's and it's eating up my gas. My check engine light is not on so I can't get a code to find out what it is. I like to mention I'm a girl but I'm not a dumb girl so I've been trying to investigate what it is and I've come across a few different things. Possibly a speed sensor, a shift solenoid , throttle position cable, or TpS sensor... I'd like to try to pinpoint what it is instead of having to replace all these parts because it's quite costly. Any help on the subject would be greatly appreciated and if you need any more information on the subject let me know please and thank you.