I recently installed a rear diff temp gauge. Does anyone know what temp it should be reading at under normal driving conditions? It's reading roughly about 130 degrees. Also I tried to install a 1/8 npt sender into the test port on the tranny and for some reason or another it wouldnt fit into the hole. The threads matched up was the sender to long? I searched this and couldnt find to much info.

 

Rear diff temp gauge? Why?

 

Im running oversize tires and switched to steel rims. I wheel alot of muddy terrain and in result end up getting stuck to where the tires are working overtime to get me free. And every now and then I tow a small trailer. So im pretty sure its getting to hot at some point in time.

 

I have never heard of someone having a diff temp gauge on their truck before. Just out of curiousity even if it was running HOT what could you possibly do to cool it down......stop driving?

 

Trucks that tow usually have diff gauges, you let the cool down by just stopping.

 

My tractor trailer has diff temp gauges in both of the rear diffs


I was thinking about putting in a rear diff temp gauge in the Ranger but scrapped that idea.

FWIW though, my big rig diff never gets over about 130F unless I lock the diff then it goes to like 150F after an hour or so fully locked.

 

I believe 120-150 is average and considered normal... above that the oil starts breaking down...

FWIW... I have a temp prob in my diff too...