Only 1st and Reverse!

[aking284]

Hey guys!

So my 4l60e tranny in my 97 c1500 suddenly started acted funny. It will engage first gear and reverse, but other gears will not. I do have a tranny leak which I tried fixing by replacing the rear main seal and the output shaft seal however it still leaks.
Dip stick showed to be dry, added fluid and still same thing.
Do you guys think the tranny is shot? Or maybe not enough fluid still?
Ps.- trans component slipping code was given on reader.
Thank y’all so much!

 

[NickTransmissions]

Hey guys!

So my 4l60e tranny in my 97 c1500 suddenly started acted funny. It will engage first gear and reverse, but other gears will not. I do have a tranny leak which I tried fixing by replacing the rear main seal and the output shaft seal however it still leaks.
Dip stick showed to be dry, added fluid and still same thing.
Do you guys think the tranny is shot? Or maybe not enough fluid still?
Thank y’all so much!

On a flat surface at operating temp, check fluid level-it should be at the full hot mark.

Next, check your speed sensor, wire to the speed sensor...no upshift out of first is an indicator that voltage signal from the speed sensor isnt getting to the pcm so the pcm cuts off all upshifts.

Also make sure it's plugged in.

 

[aking284]

On a flat surface at operating temp, check fluid level-it should be at the full hot mark.

Next, check your speed sensor, wire to the speed sensor...no upshift out of first is an indicator that voltage signal from the speed sensor isnt getting to the pcm so the pcm cuts off all upshifts.

Also make sure it's plugged in.

Will give this a try thanks @NickTransmissions

 

[NickTransmissions]

Will give this a try thanks @NickTransmissions

You're welcome, let us know what you find...