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Re: 4T60E transmission temp sensor
One idea is to hookup say a voltage gage to the solenoid(s) in question.
So then you can see if the activity is being "commanded".
I am wondering if a vehicle speed sensor or ERPM sensing is not working correctly.
Seems like this was around the time frame of the EC^3 (Electronic Converter Capacity Clutch or Electronically Controlled Converter Clutch - I forget which right now) which basically uses a pulse-width modulated pressure to control the TCC clutch. The idea is instead of locking up the TCC "solid" it allows the two sides of the clutch to slip in a controlled manner with about 5 rpm difference, all in the name of getting better damping thru the driveline.
I'm not 100% up to speed on the details of how the strategy works past that but any error in speed sensing is probably going to kick it back into a "normal" mode where clutches are in a normal and locked state. One side is probably related to Eng RPMs and the other is probably sensed in the transmission but not sure where.
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1988 Chevy R-30 1 ton DRW pickup (217k)
1991 Chevy S-10 4WD pickup (192k)
2000 Grand Prix GTP (218k)
2002 GMC Yukon (185k)
2009 G8 - GT (46k)
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