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Hey everyone I'm pulling a 22 foot long toy hauler weighs 7,700 pounds loaded up and going up hills my transmission gets very hot have it in 4th gear not pushing it hard at all just changed the tranny oil and filter anyone got any suggestions to help this from overheating I don't want to replace my transmission and I do have the tow mode on
 

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Slow down.
Drop 3rd gear and pull at 3500 rpm until over the grade.
 

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^^^ What he said. If I'm in 3rd and don't exceed 45 MPH I seem to be able to pull uphill all day long. However, I haven't pull that much weight up steep hills. More like around 6,000 lbs.

7,700 lbs seems light for a toy hauler fully loaded. Mine is around 11,000 lbs fully loaded.
 

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mine is heating up as well 2007 2WD big tow. Mine seems to buck with any sort of head wind and trip 1 it runs fine two weeks later she is running hot. Iam getting a external tranny cooler put in tomorrow to help with those issues.

But 3rd gear for our trucks is a life saver your gauge will drop with those added RPM's
 

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I'm also thinking of the external cooler. Are you bypassing the factory...or installing this one in line with the factory.

I live in PA. If i install a external cooler in line with the factory would i just need to let my truck warm up for a minute or 2 during the cold winter months? Any other issues?
 

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The router my fluid takes is: radiator -> OEM cooler -> external cooler. At highway speeds in the winter my fluid never comes up to temperature, it's stuck on the bottom of the gauge. I didn't do the install of the external cooler. If I had done it then the route would be: OEM cooler -> external cooler -> radiator. Or, if I bypassed the radiator altogether then I would put in a bypass module that only sends the fluid to the OEM/external coolers once the fluid is up to temperature.
 

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People usually bypass the oem cooler for the safety factor of the transmission. Then there's no chance of having the plastic crack an leak coolant into your tranny, like many have had happen.
There is a thread on here somewhere with a guy that added a bypass for the colder months. I'll see if I can find it.
 

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I finally got around to doing the external W/factory bypass....I put the middle size one in and have the PML trans pan(trans pan was a worthless mod imo)do the tranny bypass and dont look back!
 

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People usually bypass the oem cooler for the safety factor of the transmission. Then there's no chance of having the plastic crack an leak coolant into your tranny, like many have had happen.
There is a thread on here somewhere with a guy that added a bypass for the colder months. I'll see if I can find it.
Just to clarify, people bypass the OEM radiator for the safety factor. I have yet to hear of anyone have a failed OEM transmission cooler.
 

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Just to clarify, people bypass the OEM radiator for the safety factor. I have yet to hear of anyone have a failed OEM transmission cooler.

I worded it wrong is all, was meaning the tank. Thank you for clarifying my miss information :)

Sitting in orientation that's I've done countless times lol brain dead on 3 hours sleep. I needed the help bud lol
 

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titan tranny.jpg

I have a 2007 same problems until i had a external cooler installed to run in series with the factory this is one year later with a head wind and when I threw the heater on it dropped it more.
 
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