98 chevy tahoe transmission problems

The transmission in my moms tahoe wont shift out of 2nd,or maybe third,idont know bout tue gearing, but it runs 4700 rpms at 60 mph. The fluid smells burned, it has 147000 miles on it. Anybody know what could be wrong? I really need some help

sounds like the speed sensor or throttle position sensor one of the two.

Try changing the fluid and filter how long since its been changed?

Idk how long ago the filter change was. We bought it used at 130000 miles. What are tell-tale signs of a sensor going out?

Then it probably needs serviced I've done this before and the fluid smelled burnt and it wasn't shifting right I did it and it fixes it so it may work I'd try it before spending $$$$$ on a rebuild

Ok ill relay the info. Thx for the help.
do you know how much fluid it needs?

Not sure you'd have to look that up

Ok ill do that. Could the overdrive belt be burned up? It jerks when you get on the gas from coasting.

Have you Reyes taking it out of overdrive?

Really sounds to me by the Rpms that your not getting out of second and it's probably blown unless its the filter and fluid

Had a 98 chevy van the throttle position sensor went out it stayed in second gear would not go on up in to drive or over drive. And I had a 97 Buick that would not go into over drive that was speed sensor.

Ill be sure to relay the info. Wheres the throttle sensor at.

It shouldnt be blown tho, it's never slipped since weve had it.

3in x 3in square box on the intake close to throttle cable.

3in x 3in square box on the intake close to throttle cable. just google throttle position sensor and the year and type of car it will show it.

It will go into drive right but won't shift up past 2nd right

Ya thats whats happening. It seems to be stuck in 2nd.

Just try what I suggested If that doesn't work bring it to an tranny shop and if u want to test the speed sensor hook it up to a scanner

Thats what were planning on.

Soooo. We changed the trans oil and filter. It didnt help. It wont start moving till the revs get to 4000 and then it barely moves so the trans is completely
Shot. Were getting a 91 honda accord from my uncle.

You could try a junkyard trans if you know how to put a tranny in I know by me u can bring it back and get store credit it's like 150$

could be a bad torque converter even