Nnbs problem
#1
Staging Lane
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Join Date: May 2011
Location: Greenville, sc
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Nnbs problem
Have a 2007 nnbs with the 4.8 and im noticing a slight problem. Truck runs great but while sitting in traffic the coolant temp is creeping up and as it creeps up the tranny temp starts to also. Truck has 50,000 miles and i never noticed issue before.
Usually truck runs at about 210 degrees with roughly 170 degree tranny temp but as of lately ive been seeing 220-230 degree coolant temps and 200 degree tranny temps... Only in traffic. Any ideas?
Usually truck runs at about 210 degrees with roughly 170 degree tranny temp but as of lately ive been seeing 220-230 degree coolant temps and 200 degree tranny temps... Only in traffic. Any ideas?
#7
any debris in the radiator?
I have an 07 silvy nbs with the 4.8. it has the trailering package and is a z71.
when I was driving really slow down a gravel road (leading for a tractor we were moving) i noticed my trans temp rose to *180. it has a seperate trans cooler, but it didnt help much at slow speeds (less than 10 mph). soon as i gave it a little gas, it cooled down. im gonna say your fine.
I have an 07 silvy nbs with the 4.8. it has the trailering package and is a z71.
when I was driving really slow down a gravel road (leading for a tractor we were moving) i noticed my trans temp rose to *180. it has a seperate trans cooler, but it didnt help much at slow speeds (less than 10 mph). soon as i gave it a little gas, it cooled down. im gonna say your fine.
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#8
Staging Lane
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Can i install a 160 thermostat without a tune or anything? And keep fans at factory turn on temp? Or will that defeat purpose? And what would yall suggest for external tranny cooler? Mine has internal in radiator? Install tips?