Well i have a 97 12valve auto, with a couple mods. But this weekend was really the first time i used it to pull a heavy load up steep grades. I was pulling a pickup that weighs around 5K on a flatbed pull trailer thats probably around 2K . on a coupke of the steep grades my truck was a turd! the temp got up around 230. oil light came on the dash. It seems like it has something to do with the auto trans cause when the TC locks up it pulls alot harder. So my questions are:

Are they supposed to get that hot?
does the auto really suck that bad pulling"?

I was thinking of doing a 5 speed swap if that will make the motor pull at its postential..

My dad was right behind me in his lifted 99 powerstroke pulling about the same weight. says he has no problems at all. running the ac too.

 

reposted this in 12valve. Kodi

 

reposted this in 12valve. Kodi

 

reposted this in 12valve. Kodi

 

The stock torque converters in these transmissions are HORRIBLE to be nice about it. They put down about 50% of the power you are making Buy you a good torque converter, and a valve body to up the line pressure, and then throw a fuel plate in it. 7k lbs isnt that much weight. Still dont know why your oil light would be coming on, and the temp's getting that hot though. Check out www.goerend.com for the transmission stuff. Then put you a #0 fuel plate in there. She will pull a load then

Eric

 

Gauges- Pryo, Boost and Trans are nesscessary to monitor the power you are making. Your oil might have been getting hot because your EGTS were getting high.

 

check you radiater, Mine got hot pulling 20k for the first time this year found the fins cloged with tree flooting stuff you see in the fall and no amount of hosing while in the truck cleaned it out. I bought a new one but maybe could have cleaned it once i got it out. PS DO NOT BUT IN AFTER MARKET THERMOSTAT BUT OF CRAP. take my word for it. it now runs 180-190 all the time.

 

Do cummins usually run hotter with higher mileage? Mine has 290K on it.



It runs fine with the AC on, even in 100 deg days. It only heats up pulling a load up a long pull.