Hello everyone.
i searched round and couldn�t find this problem. I had my 4l60e rebuilt about 10 years ago, since then i have put maybe 1000 miles on it as i haven�t needed it and its been my slow project. I finally got it built to a place where i want to start driving it. But when i drive, it shifts from 1-2 fine then 2-3 is like throwing it in neutral, if i get 2nd up high enough i can feather the gas pedal and get it into 4th but it won�t go into overdrive. Any ideas? I have replaced basically every sensor tps etc. the rebuild was supposed to have included all new electronics, heavy duty clutch packs upgraded servo etc. any ideas?

 

4th is overdrive...so if you're getting it into 4th you're getting overdrive. Sounds like you have mechanical issues

 

Are we 100% sure we're full on fluid?

 

I should have said the torque converter is not locking up, and yes fluid is good, transmission is at 163 degrees and in the cross hatch.

 

You can connect a scan tool and determine what is being commanded.
Pair that with a line pressure test
And you'll have confirmation on the status of this unit

Initial description sounds like mechanical issues

 

I have a scan too, what exactly should I look for being commanded?

 

Which gear is being commanded
Whether or not lockup is being commanded
PCS amperage commanded vs actual

Pair all that with a pressure gauge monitoring the line pressure of the trans and you can make a good determination of what might be wrong

 

I did watch as the scan tool showed each gear that was being commanded. Didn�t see that it commanded a lockup. I�ll have to check pressure and get back.

 

It finally pop a vss code today. I haven�t had time to do much with it but hopefully that�s all it is.