My Google Fu is failing me today. What is the thermal operating range of conventional gear oil? At what temperature does it start breaking down?
Conventional Gear Oil Thermal Range
- Thread starter Rut Row
- Start date
OP
EXcuuuse me! Woke up on the wrong side of the bed again today?
Or maybe it is getting close to your annual shot of ... from Momma? I'm breaking in gears and wondering what "too hot" is in farenheit.
Follow proper break in. Then change it.done. if its generating excess heat I'd be worried about an install problem not about oil breakdown.
From Randy's r&p-
Running 250° to 275° is normal for new differentials during the break-in period. It is critical to not tow or take long road trips for first 500 miles as this builds additional heat. At 300° the diff is considered too hot and it should be allowed to cool.
From Randy's r&p-
Running 250° to 275° is normal for new differentials during the break-in period. It is critical to not tow or take long road trips for first 500 miles as this builds additional heat. At 300° the diff is considered too hot and it should be allowed to cool.
OP
This is what I was looking for. I know how to break them in but was curious about the temps. Thanks!
Remember that Randy's is considered a bit of a suspect company here. If i was you i would look into that some more
OP
so, back to the search for the technical info. I'm disappointed the gear oil manufacturers don't publish it.
OP
I was searching for "thermal range of conventional Gear Oil"
no wonder I couldn't find it
OP
thanks. My main goal is still to find specs about the oil. It frustrates me that Valvoline doesn't show anywhere what their optimal thermal range is for the oil. I've emailed Valvoline but am not expecting a response.
Their SDS says:
Boiling point/boiling range : > 424.9 °F / 218.3 °C (1013.333 hPa)
Flash point : 394 - 480 °F / 201 - 249 °C
So the 300 degree reference above is reasonable. I'm tired of Googling and give up.
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OP
amazing that they answered.
Valvoline Product Support answered:
"Thank you for your interest in our products and your question! We don't list a thermal operating temperature for our passenger car/ light duty truck automotive grade gear oils, however we did reach out to our product formulator to try and get a good answer for you. The operating temperature range our formulator provided for our Valvoline High Performance 80W-90 Gear Oil is -15°F up to 217°F."
Valvoline Product Support answered:
"Thank you for your interest in our products and your question! We don't list a thermal operating temperature for our passenger car/ light duty truck automotive grade gear oils, however we did reach out to our product formulator to try and get a good answer for you. The operating temperature range our formulator provided for our Valvoline High Performance 80W-90 Gear Oil is -15°F up to 217°F."