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Normal trans temp for 07 silverado 1500 Z71

Wardsilverado

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Wardsilverado Enthusiast

Wardsilverado

Posted
Posted

I was just wondering what the normal trans temp would be and at what temp should start worrying. In two high and normal driving it gets around 85-90. When I plow in four low it only gets up to 65-70 degrees and in four high plowing it gets up to 100 degrees. The temp stays lower while I'm plowing in four low but people tell me I should be plowing in four high.

kstruckcountry Senior Enthusiast

kstruckcountry

Posted
Posted

Regular driving it should be about 90 degrees above air temperature. Plowing and towing will vary, most don't worry til it approaches 230 or so.

Chris Senior Enthusiast

Chris

Posted
Posted

Im going to guess those temps are in Celsius because i see higher in Fahrenheit even with an oversized cooler. And about 60-70 degrees Fahrenheit above ambient temp is about good. I run 50 anove ambient with my cooler but in cooler temps i end up over-cooling thd fluid

fireengineme Enthusiast

fireengineme

Posted
Posted

when i first bought mine(used) and took it for a test drive for a few days mine pegged to the max after driving it for about an hour ,. it was determined that the pump inside the tranny was not pumping the fluid to the tranny cooler which caused my issue ,. they put in a new rebuilt tranny and mine never goes over 100 degress in either 2wd or 4wd

intheburbs Enthusiast

intheburbs

Posted
Posted

My guess is the Trans pump is turning faster than usual in 4 low, so it's circulating fluid faster, hence the improved cooling and lower temperatures.

 

Dexron VI is stable to >250°F. I've had mine as hot as 235 when pulling a heavy trailer in the Rockies. Don't worry about it.

Wardsilverado Enthusiast

Wardsilverado

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Posted

K thanks. I started using the tow/haul mode when plowing light snow in 4 high. Holds the rev a little higher before shifting. This seems to help the temp stay down below the 200 F

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