Engine/Transmission (1998.5 - 2002) 47RE Temp...

[Nate]

What is the normal reading for your transmission with the sender in the hot line? I've searched on this site and google and I haven't found very much.



I'm seeing about 200-220* in town and 140-150* in lockup.



I put the sender in the case and I'm seeing 140* in town. Interesting...



I'm running Banks guages. . they say to install the sender in the rear servo.

 

[DBraunig]

Mine runs about the same in the "hot line" 180-200 in town and 110-130 highway. the hot line is the most accurate point to measure the trans temp. it is right out of the converter on its way to the cooler. this is the hotest point for the fluid and the best place to measure temps.

Dave.

 

[Nate]

Yeah I know what your saying. It just seemed hot compared to my Jeep (42RE) which gets up to maybe 160-170* in town.



I had anyother thread on this, but I didn't get much info in terms of what everyone else was seeing for their transmission temps... I was hoping more people you post to this thread.

 

[azpete]

Running the freeway mines about 150-160. In town, just like you I will see 180-200 if I catch too many lights. Just installed a double deep pan and just like I've heard it doesn't help much except that it seems to cool down alittle quicker once you get some air moving.

 

[GBobbitt]

Since the stock converter has a fairly high stall speed, and stall speed is torque-related and vehicle weight related, and the cummins engine makes gobs of torque, and our trucks are heavy, would our trucks not build more heat in the converter than a vehicle such as the Jeep. It seems like the torque energy we lose in our inefficient factory converters would have to be converted into another form of energy such as heat. That would explain the higher hot line temperature readings. Maybe one of our trans manufacturers can explain this better than I can or at least correct me if I'm wrong.

 

[Double J]

I'm running around 140-150 while I'm locked up. In town, I can keep it below 180 provided I kick it in neutral whenever stopped at a light... It's become a habit that if I'm stopped and running, I'm in neutral. If I just leave it in drive temps can easily exceed 200.

 

[rweis]

I'm seeing unlocked 175, locked 150. DTT transmission 89%. I put a H7B cooler on mine and if it get a little warm (<200) I flip on the H7B fan and it will keep the hot line to no more than 50* (generally 25*) above pan temp which the H7B / fan will keep the pan temp at 150 (Mag Hytec DD).



I ALWAYS run the fan when towing my 13k RV. ESPECIALLY for backing when the temps can go to 250 in a heart beat without the fan, 220 with the fan.



Bob Weis

 

[MSalvatore]

I have sesorer in trans pan and never goes above 150 driving daily. towing maby hit 170-180. autometer ultralite guages



Marc