Eco Boost Owners - Anyone using a Tow Tune?
Anyone using a tow tune from a company like 5-Star? If so, does it make a difference? Are you using 87 or 91 octane?
Forum Discussion
Wes Tausend wrote:
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I wonder how the new low-friction rear ends are doing in these powerhouses? The EB exceeds the HP/torque of the early 2 valve V-10's, and often F-250 towing capacity as well. But the old V-10's were ahead of a fuel-thirsty 10.5 inch Sterling gearset used in most 350's and even some 450's, I believe.
What is under the F-150 with 11k plus tow capacity? I thought they were just a 9.5 inch (EDIT: 9.75 inch) rear axle or thereabouts. Some new metallurgy at work here?
Wes
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Ford also stuck (still is actually) a 9.75" ring gear in the E350 vans with the diesel or the V10. It holds up just fine for anyone staying below 20,000 GCWR, and at stock to moderately boosted HP. I'm not aware of any special treatments they do to the material. I suspect the full-synthetic gear oil specified is the main reason they can rate a small rear end so high.
