i got a 5.3 4l60e in my 83. the only problem is my trans is in limp home mode. ive replaced the vss and neutral safety switch box and the trans is freshly rebuilt. does anybody have any suggestions or has anyone had this problem before. any suggestions on what to check would be appreciated. thank you.

 

You need to see if there are any codes stored. I'm sure there are if it's in limp mode. Post up any codes you have.

 

so i tried hooking up the scanner to my obd2 port and its not reading that its hooked up. ive got everything hooked up correctly... at least i thought i did. purple to serial line. orange to battery and the two blacks grounded. ???

 

What harness are you using? You might have a blown fuse. Check the cig lighter fuse or power supply fuse. They usually share the same fuse as the obdII port.

 

what harness are you using? are you running a DBW TB? why do you have the Nuetral switch on it? i took mine off in my 94 no need for that imo.

 

+1 on checking the fuses.

Was it like this from the install or was it working fine and all the sudden happened?

 

I've got a harness from a 99 silverado. My buddy did most of the wiring for me. it's been doing it since i hooked it up. What should I do or check?

 

if you hate automatics, then throw a t56 in it

 

what size torque converter are you running? Sometimes if you have a loose converter it thinks the tranny is slipping toooo much and puts the vehicle into limp mode... it may not be your issue but this is what happened to my truck when i put my verter in...

 

recheck your harness and make sure you dont have any bad connections, i have a 97 and had a bad connection which put my tranny in limp mode and by the time i could get down the road to my house, my tranny was pretty damaged, well it was burning clutches before that so i knew i was going to have to rebuild it anyways, so i am actually waiting on my rebuild kit at the moment but im going to have to check ever single wire in the harness