Engine/Transmission (1998.5 - 2002) How hot is your NV5600?

[jwinnie]

I got home from work the other day and was under my truck playing with my new infrared thermometer, pointing at the transmission it showed almost 200* Is this normal after 35 unloaded hwy miles? What temps are you guys seeing pulling trailers? ambient air temp was about 70*. I'm putting in a temp guage this week.



John

 

[Riflesmith]

Mine peaks at 160 degrees unloaded at freeway speeds with 90 degree ambient temps. I do have Fast Coolers and run Amsoil in it, so I don't know if the comparison is valid. I have no idea how hot it ran without the Fast Coolers and with the stock lube.

 

[TomGolden]

According to my SPA digital temp gauge, which is installed in one of the two FastCoolers on my NV5600, in the winter I rarely ever get over 110*, at this time of year when average outside air temps are 100 - 105*, my transmission hovers around the 150* mark.



I have ~6 quarts of Amsoil Series 3000 5W-30 synthetic oil in mine. I almost never tow, and rarely have any weight in the bed, except my tool box which is ~200 pounds.

 

[FDNYMOPARGUY]

Stock lube, one Fastcooler, truck @ 7600lbs:

90 degrees ambient air temp, cruising 65mph: 150-165 degrees

below 50 degrees ambient air temp, cruising 65mph: 125 degrees

towing 7000 lb. TT 90 degrees cruising 65mph in 6th gear: 185 degrees

towing 7000 lb. TT 90 degrees cruising 60 mph in 5th gear: 155 dregees

 

[Dkevdog]

I would NOT expect to see 200* after only 35 unloaded miles... ... .

I RARELY see mine go over about 185-190* and that is towing a 10K high profile 5er.



Are you sure of the accuracy of the gauge?



Kev

 

[csevers]

Today 70 ambient 35 mile emtpy trip to work 144 case temp with radar temp gun. Redline MTL in trans.



Craig

 

[CFAR]

I have two fast coolers penzoil synchromesh juice, my highest temps are at idle maybe 155* after a drive. Its like the pyro it heats up after you stop. No air flow. But 200* seems high.

 

[Sticks]

I wonder if you were picking up some of the exhaust heat. Check again from the drivers side and point blank. I have seen funky engine temperatures with one of those infra red doohickies. The hot air moving around the area where you are checking will throw it off.



For example, I checked a valve cover on a car and it came up as 390* and I could touch it bare handed, where as the head next to the injectors was a comfortable 175* and was not able to nor willing to touch it. The car had been running for a while, and the fan was blowing the heat from the exhaust manifold around.

 

[700rmk]

the heat

Lets see, towing a 23ft boat back from Lake Powell this past weekend, with my mudder tires on, and 108 degree air temp, at 4pm I got to 210 in pretty short order towing at about 72mph. I have fast coolers installed and stock oil... .





Empty I average around 150-165 at freeway speeds...

 

[Mad Bomber]

temps

Just got the temp gauge in with fast coolers I run 150*. Eric

 

[CFAR]

10k enclosed 16'x8' cargo trailer, 500lb bike in the back, 75mph, I was seeing 210*, idling to cool off turbo it would go up to 230*. Brand new synchromesh transmission fluid, fast coolers.



What do you think too hot?



Highest ambient according to the Dodge-ometer was 92*.

 

[C. Harlan]

8100 lbs empty, cruising 75-80 mph- ~160°-165°



Loaded, I have gone as far as 185°... This was towing a 32' flatbed with a JD tractor & batwing shredder, for ~110 miles. . Usually, towing anything does not go over 170°



-Chris-

 

[jwinnie]

Well I'm still waiting on my gage so I grabbed a "calibrated" infrared gun from work and it showed 168° after the same trip.

I don't think I'd worry too much if I was running 200°, The spec sheet on the Pennzoil synchromesh fluid says: "This product will satisfactorily lubricate General Motors or Chrysler manual transaxles and transmissions from -40°C to +150°C. "

150°C = 302°F That's hot.



Thanks for all the replies



John