I had my D60 semi float axle break on my E350 on I-95, lost the left rear wheel and skidded down the highway for 1000 ft or so on the brake drum. Lucky for a lull in traffic, I had no collision with another vehicle. Been trying to find a D70 to replace my D60, none to be found anywhere. Having an axle custom build by East Coast Gear Supply, guys who are very familiar with these axles. Only way I found to get an upgrade.
Although the 2008 FF had RSC, it has 60 tooth tone rings that are incompatible with the 2009 RSC. In short, I had the 54 tooth rings off my semi-floater machined to fit the FF hubs in place of the 60T rings. Everything works fine now.
I hope this helps someone else looking to do the same swap,
I just completed an upgrade to a ff D70 on my 2012 E350 van converted to a motorhome. The conversion was accomplished with all new Ford parts, except for the differential gears, custom from West Coast differential, maintaining the 3.73 ratio. Load rating of the new axle is 7700lbs, and the wheel spacers are no longer needed. Upgraded tires to Continentals, rated at 3950lbs load. Email if you are interested in details, gregswetzel@gmail.com.
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