Differential swap
Our tow vehicle is a 2004 f350 with the v10 and 3.73 gears. It pulls just fine here in flat-land country, but not much of a grade is needed to make it shift down. We'll be heading out West in the near...
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Sorry for the delay on this report. I picked up the truck and 5er last Saturday. We were running an '04 SD V10 CC SRW LB 3.73 as our tow vehicle pulling a 10,000 lb 5er. The truck did okay here in flatland country, but even on the flat it shifted down often. It seemed like even the slightest rise would bring on a downshift. That concerned me because in less than two years we will retire and head out to see ALL the national parks. Traveling up ANY mountain, I thought, would put tremendous strain on the transmission. So we had the differentials changed to 4.56.
On the drive home the tranny shifted down very seldom. Now, granted the drive home is very flat, but still, the difference is amazing. The truck has significantly more power than it had before. It is much more enjoyable to drive now.
Prior to the change 70 mph produced 2000 rpm. Now 70 mph produces 2450 rpm. Driving the truck without the trailer the increased rpm is not the least bit annoying.
So far, I'm happy with the change.
On the drive home the tranny shifted down very seldom. Now, granted the drive home is very flat, but still, the difference is amazing. The truck has significantly more power than it had before. It is much more enjoyable to drive now.
Prior to the change 70 mph produced 2000 rpm. Now 70 mph produces 2450 rpm. Driving the truck without the trailer the increased rpm is not the least bit annoying.
So far, I'm happy with the change.
