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[GMCnet] Fwd: Digi Panel Group Buy [message #173413] Fri, 15 June 2012 16:58 Go to previous message
emerystora is currently offline  emerystora   United States
Messages: 4442
Registered: January 2004
Karma:
Senior Member

>
>
> On Jun 15, 2012, at 3:22 PM, D C *Mac* Macdonald <k2gkk@hotmail.com> wrote:
>
>>
>> Good afternoon, Emery.
>>
>> So which tranny temp should concern me, in or out?
>> I suspect out, but I'm pretty green on this stuff.
>>
>>
>
> Yes, out is going to show you the hottest temps but that really isn't going to let you know if the transmission cooler is working well. If you monitor the transmission pan temperature it will give a good indication of how well your transmission is being cooled. My tranny temp sensor is in the pan, which is probably the most accurate, most meaningful, and least subject to "spikes". What I've seen over the past year (at highway speed):
>
> Towing: Temp about 60 degrees over air temp on level roads (e.g. air temp of 90 means trans temp of 150). On grades where the engine is working pretty hard the trans temp will climb to about 75 degrees over air (e.g. air temp of 90 means trans temp of 165). On long hard climbs with the engine at WOT in 2nd gear, the trans temp will steadily climb well above these numbers. The highest trans temp I've seen so far was 195 degrees at the crest of a 5 mile long, 6% grade with 95 degree temps. Once you hit the 190 level you might either start going downhill soon to take the load off the engine/ transmission or pull over to let things cool down. Heat is a major destroyer of your transmission.
>>
>> I guess I could double up Oil and Tranny temps with the
>> switch and do the same with chassis and house battery
>> monitoring.
>
> You are going to find that the oil temperature closely follows the coolant temperature. I once installed an oil temperature monitor right at the outlet of the engine where it went into the oil hose going to the oil cooler. After a short time I removed it because it wasn't telling me anything that the water temperature gauge wasn't already doing.
>>
>> Now, I'm pondering buying a PAIR of 3-slot monitors to
>> monitor six parameters continuously without having to
>> switch functions around, but that's rather costly.
>
> When you have too many gauges you are spending all your time monitoring them. Sometimes I wonder how I managed to drive my GMC all those years with just the original stock gauges! As you pointed out, sometimes one can just be a little but too anal. :) :) The thing is to have just the few gauges you really need BUT know how to interpret what they are telling you.
> Emery Stora
>>
>
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