I searched, plus poked around the stickies and there's a lot of stuff on TCs!
I got a problem that's either gonna be real simple to diagnose, or I'll start doing the readings to track down my current lockup problem.
The setup:
-Normal motor and a good tunejob
-I rebuilt the tranny all the best stuff and a 3000 Edge 4 years ago = maybe 12,000miles on it all.
-Normal motor and a good tunejob
-I rebuilt the tranny all the best stuff and a 3000 Edge 4 years ago = maybe 12,000miles on it all.
Current State:
-Last year when REAL hot outside I noticed the car ran hot on the interstate and lockup would kick out and a CEL would come on after running 1-1 1/2 hours at 75. Turned out the light was P1870.
-So, I replace thermostat. A Dealer friend says his decision-tree book says it's plugged cats. They supposedly overheat the car and cause the lockup to kick out.
-So, good excuse to get Tri-Ys and cats and new AC O2s last year.
-This year the car's doing fine but been getting P1870 light even around town - but it resets itself every 5th trip out or so.
-This weekend (with light off) it's real cool outside, the car never even gets to 1/4 on the temp gauge, but I lose lockup and get a new light again after 1/2 hour on the hiway. It happens again like clockwork coming home. The light's still on starting out but lockup is fine until pulling a grade at 1/2 hour, and then no more lockup after that.
-Last year when REAL hot outside I noticed the car ran hot on the interstate and lockup would kick out and a CEL would come on after running 1-1 1/2 hours at 75. Turned out the light was P1870.
-So, I replace thermostat. A Dealer friend says his decision-tree book says it's plugged cats. They supposedly overheat the car and cause the lockup to kick out.
-So, good excuse to get Tri-Ys and cats and new AC O2s last year.
-This year the car's doing fine but been getting P1870 light even around town - but it resets itself every 5th trip out or so.
-This weekend (with light off) it's real cool outside, the car never even gets to 1/4 on the temp gauge, but I lose lockup and get a new light again after 1/2 hour on the hiway. It happens again like clockwork coming home. The light's still on starting out but lockup is fine until pulling a grade at 1/2 hour, and then no more lockup after that.
So, it ain't temp related. And, what's so magic about exactly a 1/2 hour running at 75? Andre is stumped too. This garage queen ain't exactly getting pushed anywhere near the TC's limits.
Like I said it's either real obvious for you guys or I'll have to just tear into it.