Lifetime Supporting Member
Join Date: Jan 2007
Feedback Score: 0 reviews
I always use overdrive, unless the grade dictates otherwise. Sounds like maybe you could have down shifted on the described situation. Depends on a lot of different circumstances, length of the grade, how close to the top, weight of load, etc. EGTís dictate some of what to do. If they are too high itís let off some or downshift. A truck with stock injectors and tune will be hard to get the egtís too high. We have some fairly steep grades here in NE Iowa, on some I down shift at the bottom of the hill before the motor even begins to lug, pick a speed (usually 55) and hold it there till the top. One thing I have learned with my 3.55 geared truck, waiting too long to down shift is the wrong thing to do. The 4.10 auto truck is much more forgiving.
1995 F350 CC dually, 5 speed, 2WD, 3.55 gear, 4Ē exhaust, e99 intake spyder and intercooler, DIY air filter mod, custom gauge pod with pyro, egt, and trans temp. 160 FF injectors, DP F6 w/40 tow, 80 tow, 80 dd, fast idle & exhaust brake, PTO w/hydraulic pump for custom tilt bed trailer and winch