| Re: [GMCnet] does synthetic trans fluid lower temps? [message #121295] |
Fri, 08 April 2011 06:51 |
Gary Casey
Messages: 448
Registered: September 2009
Karma: 0
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Senior Member |
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The second opinion expressed below is certainly more correct. In an engine
viscous drag is a significant factor, but in a transmission these losses
("friction") is not much of a factor. By far the largest source of heat in a
transmission is the loss in the torque converter and that has nothing to do with
the type of oil. Yes, the synthetic could likely tolerate being hotter than
standard oil, so the "critical" temperature will be higher. I would suggest
that for standard oil the temperature at which to start being concerned is about
250 and for the synthetic might be 270. Both numbers are very approximate and
depend on how long the oil runs at temperature. If the temperature spiked to
even 300 for just a few minutes I wouldn't get too concerned, but if it
continuously runs at 250 I would think about adding another cooler - or change
driving habits.
Gary Casey
hertfordnc wrote on Thu, 07 April 2011 13:36
> First, do not take for granted the civility on this forum.I found a thread on
>this topic over on the rv.net towing forum but they act like thugs to each other
>so it's difficult to extract meaningful information.Someone there suggested that
>synthetic fluid actually dumps heat better then regular trans fluid and remains
>cooler.THen someone else suggested he was an ininformed moron and that synthetic
>fluids only TOLERATE heat better.
>
> As i plan to keep my eys glued to a trans temp gauge I am less interested in
>the latter.
> THanks
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