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Cummins12V98 · 08-31-2015, 08:15 PM

Quote:

Originally Posted by TDI-Minnie

Mine never goes above 165F.
But another thing to watch is the rear diff. These can get brutally hot! Change that oil every 30k and if you do a lot of heavy towing, go with a 120 weight synthetic. An aftermarket cover ads cooling fins and oil capacity. A good spend.

I drained and installed AMZ/OIL 75-110 Severe Gear in the read diff of my 11 HO Ram Dually at about 10K. Here is a pic after I removed the MagHytec cover getting the truck ready to trade on my 15. Truck had 65K in pic with about 55K on the fluid.

FleetMan · 08-31-2015, 08:28 PM

My '99 F-250 PSD pulling a 9,000# travel trailer is a consistent 65 degrees above ambient on the road. Since I do not have the OTW cooler in the radiator, it is a different story in traffic and construction zones in the hot weather.

The Winnebago may get close to 200 degrees pulling a long hill with toad in 100 degree weather but typically it runs in the 160 degree range.

TDI-Minnie · 09-01-2015, 09:03 AM

Quote:

Originally Posted by Cummins12V98

I drained and installed AMZ/OIL 75-110 Severe Gear in the read diff of my 11 HO Ram Dually at about 10K. Here is a pic after I removed the MagHytec cover getting the truck ready to trade on my 15. Truck had 65K in pic...

Nice. Was the pinion seal still good?

chertz · 09-01-2015, 10:25 AM

Agreed that Amsoil Severe Gear is good stuff! I run the 75-90 severe gear in my trucks... works amazingly well!

Cummins12V98 · 09-01-2015, 11:14 AM

Quote:

Originally Posted by TDI-Minnie

Nice. Was the pinion seal still good?

Yes, everything was dry front to back on the truck.

The oil was a nice brown color not black.

guestPacer · 09-06-2015, 01:11 AM

In my 1998 Dodge CTD I ran 185 degree trans. temp heading southover the Siskiyou’s intoCa. outside temp 95 plus pulling 8350# with loaded truck. I was pulling 28 psi(still have stock exhaust) @ 1050 ET. But like others have experienced with theolder dodges w/automatics you have to work to get power (#11 fuelplate) and reliability. Earlier in June before I started looking foradded power up over the top heading west up cabbage patch inOregon 200 degree Trans. going through Pendleton 0ver 100 degrees. Yes alittle different pull.
Yes it could be I've improved driving my Dodge which I wouldhave to agree.

popcan · 09-08-2015, 09:41 AM

My mechanic tells me that if temps get a little too high, to try this little trick: Turn off the AC, and turn on the heat. You might need to open up all the windows in summer to dump the cabin heat, but it will get the fluids moving to help cool the engine in a pinch. Not a long term solution, but might help?

Cummins12V98 · 09-08-2015, 12:16 PM

Quote:

Originally Posted by popcan

My mechanic tells me that if temps get a little too high, to try this little trick: Turn off the AC, and turn on the heat. You might need to open up all the windows in summer to dump the cabin heat, but it will get the fluids moving to help cool the engine in a pinch. Not a long term solution, but might help?

Yes that does help.

But with newer tow vehicles that should never be needed.

chertz · 09-08-2015, 03:19 PM

Quote:

Originally Posted by popcan

My mechanic tells me that if temps get a little too high, to try this little trick: Turn off the AC, and turn on the heat. You might need to open up all the windows in summer to dump the cabin heat, but it will get the fluids moving to help cool the engine in a pinch. Not a long term solution, but might help?

that does work for engine temp issues I agree... However, not sure it would help with trans temp... Most of us don't have oil / water coolers on tranny's, they are just oil / air coolers.

guestPacer · 09-16-2015, 11:56 AM

This can be a little late but, just some more input the Dodge diesels ( mine 1998) up until 2001 used to types of coolers the first being a water-to-oil (located passenger side against E block partially blocked by turbo) and the second is your standard aux. air to oil in front of the ac/radiator.
The problem with most (older and still some new) vehicles the warm hot air forced in and created in the engine compartment has no place to go at a useful rate.

Bamaman · 09-16-2015, 01:01 PM

Let me just say that if you exceed 210 degrees for very long, you could be damaging your transmission. And the automatic transmission on any pickup truck is it's weakest link in the driveline. Trannys that are run hot and long simply don't last that long.

I installed a TruKool auxiliary transmission cooler to my F250. The cost may have been around $150, and it's the best insurance you will ever spend on your truck.

And the penalty for not taking care of your transmission will be around $3K for a installed heavy duty rebuilt tranny with 3 year warranty to just under $5K for a top quality custom built auto tranny and new torque converter.