F250 3.73 to 4.30 axle ratio
I have a 2017 F250 4x4 crew cab, 160" wheel base, 6.2l gas, 3.73 gear ratio. I am trying to see if having 4.30 axle ratio gears installed will make much difference regarding 5th wheel towing. I noti...
Forum Discussion
YES.......Lower Gear ratio (4:30) allows for higher tow rating
BUT.....your 2017 F250 has a 6200# RAWR
5th wheel PIN Weight is carried by rear axle.
I have a 2007 3500 SRW with same rated rear axle. Tow a 14K 5th wheel with a 3080# WET Pin weight. That puts be right at the RAWR of 6200#.
Puts be OVER the MFG GVWR of 10,100#
Swapping gears gives you more 'grunt' but does not change the Axle Weight Ratings
Get your truck WEIGHED 'Camp Ready' (all passengers- humna/pets, all cargo (backpacks, stuff in cab, stuff in bed etc)
See what your Rear Axle Weight is.......subtract that from the RAWR of 6200#
That will be how much addition weight your rear axle can 'carry'
Subtract 5th wheel hitch weight from that number..........that is available pin weight
Figure 22% of 5th wheel GVWR for a 'WET PIN' weight
2017 F20 crew cab 4x4 ------might have 3000/3100# available depending on actual weight on truck rear axle
That puts you in the 14K GVWR for 5th wheel (real world towing)
BUT.....your 2017 F250 has a 6200# RAWR
5th wheel PIN Weight is carried by rear axle.
I have a 2007 3500 SRW with same rated rear axle. Tow a 14K 5th wheel with a 3080# WET Pin weight. That puts be right at the RAWR of 6200#.
Puts be OVER the MFG GVWR of 10,100#
Swapping gears gives you more 'grunt' but does not change the Axle Weight Ratings
Get your truck WEIGHED 'Camp Ready' (all passengers- humna/pets, all cargo (backpacks, stuff in cab, stuff in bed etc)
See what your Rear Axle Weight is.......subtract that from the RAWR of 6200#
That will be how much addition weight your rear axle can 'carry'
Subtract 5th wheel hitch weight from that number..........that is available pin weight
Figure 22% of 5th wheel GVWR for a 'WET PIN' weight
2017 F20 crew cab 4x4 ------might have 3000/3100# available depending on actual weight on truck rear axle
That puts you in the 14K GVWR for 5th wheel (real world towing)
