chrisp
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- VF2 MY16 SS Redline Sportwagon
Does anyone know the temp range the thermal block opens/ operates at ?
I’d expect the VF workshop manual PDF that you can find for download within the forum would indicate the fully open temp of the transmission fluid thermal bypass valve as used with our external cooler. I haven’t had a chance to look at it but you can find and download it and check it out yourself.
Many Chevy that used 6L80E also use a thermal bypass valve bolted to the transmissions side. Those original TBV’s would fully open at 90C but a revised part was retrofitted and that valve opened at 70C. The relevant TSB is easier to find and listed below.
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Note RPO code of MYC is 6L80 while MYD is 6L90 auto.
I tried to work out the opening/closing temperature so time ago. I haven’t managed to work it out. The aluminium block is just a set of fluid channels (and is a different shape or size in different applications), so the critical bit is the actual thermostat in the bypass valve.
I have a bypass valve and I can see the codes on the cover that goes over the thermostat, but I haven’t been able to conclusively workout the temperature. I’d be interested to know if anyone else knows how to read the code, or if the temperature code is actually on the internal thermostat.