Transmission torque ratings

If you have two transmissions and one is a RTLO16718B and the other is a RTLO18718B.........the ONLY difference in these two transmissions is the heat treatment of the gears inside the case. The gears will interchange with each other. Now the difference in the heat treatment allows the RTLO18718B to handle 200 FT/LBS more torque from the engine without metal fatigue. The 1650 FT/LBS transmission will handle the higher torque output for awhile without failure, as long as the driver doesn't shock load the transmission. I'd also invest in a transmission oil cooler for the 1650 FT/LBS transmission if there isn't one now, if you uprate the engine.

If you look at a RTLO18918B versus a RTLO16918B then the higher torque rated transmissioin has a better oiling system inside of it, along with the better heat treatment of the gears.

 

the "T2" at the end of your model number means that particular transmission is rated for 1850lbs torque rating in the top two gears. I dont know what the difference is physically between 8th and 9th gears on a T2 trans and a regular trans, Mr Haney or someone else will chime in.

 

Good Evening,

You can convert that to a 13spd and get 1850ft in the last two gears. The in RTLOC means this is convertible transmission. 16909ATC means 1650ft of torque for L-6 and 7-8 get 1850ft of torque.

http://www.roadranger.com/Roadranger/productssolutions/transmissions/rtoc-16909a/index.htm

KH

 

Still CN, that is a good rugged reliable tranny combo you have considering the Cat/Tranny combo has advantages over Cummins engines per the Eaton Fuller site.

KH

 

why not just get the ecm flashed to 475hp/1750tq, and go from there, not really gonna hurt anything?