FORD F-150 AXLE RATIO CHOICE
My new trailer (Keystone 26RBS) weighs only 6600 lbs + cargo. I’m about to order a 2021 Ford F-150 equipped as follows: V6 3.5 engine Standard (not Max) Trailer Towing Package. This truck has a 10...
Forum Discussion
valhalla360 wrote:
Assuming you don't exceed the ratings...it will only put more strain on the drive shaft and rear transaxle gears but they are rated for that extra load.
Everything else will see identical strain levels.
- The axles past the pumpkin have no clue what is providing the torque.
- The transmission will simply select a different gear to keep the strain the same and the engine won't know the difference as the overall gear ratio will be pretty much the same.
It's only if you exceed the max rating for the rear end that it becomes an issue.
Assuming you don't exceed the ratings, it might not matter, but the stress is not all the same. Trans in lowest gear, converter at stall. Higher speed gears takes more torque on driveshaft to turn wheels. To apply this torque, motor mounts must resist the engine rotating in frame. Frame/body must hold the mounts in place against extra force. Driveline and gears carry the extra force. What most RVers will be most likely to see is the extra heat in transmission fluid because of extra slip in the converter.
I bet the take off from stop has more to do with increase in ratings than anything about on the highway.
