Forum Discussion
blt2ski
Jul 14, 2015Moderator
"Hannibal" was towing a 12K 5w with a Dodge 5.7 and 3.73 gears. He changed out to 4.56 gears later. I am recalling at the end of the day, he liked the 3.73 better overall. But get up and go was better with the 4.56. You might try and PM Steve to get some better comments on how it did.
i've pulled a couple of time a 12K equipment trailer with my 255/330 GM vortec 5.7. 4.10 gears and a 4l80E which has horrible trans gearing from a towing standpoint. I could hold 45-50 on a 2-3% grade in 2nd gear at 4000 without issues. I am sure more hp would be faster per say. I would not have and issue pulling this trailer with a 6.0 and the 6sp auto from GM. Be it rated for it or not. It would do it fine.
Also, depending upon the motor in the Ex, a newer gas rig may have better performance than an older 250-275HP 7.3 psd.
Marty
i've pulled a couple of time a 12K equipment trailer with my 255/330 GM vortec 5.7. 4.10 gears and a 4l80E which has horrible trans gearing from a towing standpoint. I could hold 45-50 on a 2-3% grade in 2nd gear at 4000 without issues. I am sure more hp would be faster per say. I would not have and issue pulling this trailer with a 6.0 and the 6sp auto from GM. Be it rated for it or not. It would do it fine.
Also, depending upon the motor in the Ex, a newer gas rig may have better performance than an older 250-275HP 7.3 psd.
Marty
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