Change Differential Gears to new Ratio?
Has anyone changed the differential gears in their MH to a different ratio? Our 1999 Brave is geared way too low for how we use it and my thought was that I'd get better mileage with a higher ratio. ...
Forum Discussion
Are you sure the torque converter is locking in for overdrive? As I recall if the motorhome is built on a Ford 20,500 lb. chassis it should have a 5.38:1 differential ratio, and when in overdrive the driveshaft speed should be .7 that of the engine.
The 5.38 was the tallest gear ration offered in 1999. If the motorhome is on a lighter chassis it could have a final gear ratio as low as 4.30:1
ON EDIT:
Also keep in mind the motorhome has the first version of the V10. It only has 275 HP. The following year they raised the HP to 310. The 3 valve version from the 2006 model year to the 2015 model year has 362 HP. I believe the same engine was derated to 320 HP in 2016 to meet more stringent EPA standards.
The 5.38 was the tallest gear ration offered in 1999. If the motorhome is on a lighter chassis it could have a final gear ratio as low as 4.30:1
ON EDIT:
Also keep in mind the motorhome has the first version of the V10. It only has 275 HP. The following year they raised the HP to 310. The 3 valve version from the 2006 model year to the 2015 model year has 362 HP. I believe the same engine was derated to 320 HP in 2016 to meet more stringent EPA standards.
