4l60e no lockup, no codes, trans is otherwise excellent
Alrighty, for starters this is on my 1995 g20, so it is not lt1, but a 5.7 tbi, either way it is era appropriate for the trans stuff. Thankyou ahead of time!
So, when i test drove the van, i got lockup. On my way home with it i dont get lockup. I have been driving it for a few weeks now and lockup has not come back even once.
It does not store any codes.
The SES light comes on at cruising speed but goes away, seems to not show up if i stick to backroads with lots of varied speed.
The trans works perfectly in every other way, shifts are smooth and solid, downshifts are perfectly time, etc, fluid looks great and is full.
Idle seems a bit high in park, i have not put a tach on it. coolant temp sensor to the PCM could be at fault, coolant is nasty, i need to flush it.
Harness looks really clean, actually the whole van is pretty darn immaculate all around. I did unplug the trans connector and it looked clean, and plugged it back in. Grounds are all clean.
Not sure what else to note.
I wonder if this could just be a brake switch issue, as i do not think that will throw the code. Do any of yall know if it is it integrated with the stop lamp switch, or shift lock, etc?
Perhaps this is an PCM fault, i should probably yank the tps or something and see if it holds a code. I am going to buy a backup used one anyway...
any input would be appreciated. Where would yall start looking?