F350: 4.30 or 3.73 Gears
Very close to ordering a new F350 SRW 6.2 engine, long bed, rear wheel drive, crew cab. Tow a Grand Design Reflection 27RL. Pin weight 1900 lbs and trailer at 9000 lbs (both scaled weight, fully pac...
Forum Discussion
RCMAN46 wrote:Chuck_thehammer wrote:
I would like the 4:30...
2 wheel drive 3:73.. very towable..
the 4:30 would allow a higher gear going up hill.. less rpms
engine is fine at 4,000 rpm's.. but body, sound, vibrations..
my opinion
The 4:30 will not allow less rpms going up a hill.
If climbing a hill requires x horsepower then the the engine will have to turn y rpm to make that horsepower.
Thus same rpm regardless of the rear end ratio provided you have a transmission that will allow the required rpm. The newer 6 and 8 speed transmissions do this very well.
There is nothing wrong with using 6 th gear with a 4:30 and 5th gear with the 3:73. The final gear ratio to the rear wheels will be very close.
Rear end Gearing does not make more power.
NOT more Power.. more mechanical leverage.
and it will lower the rpm's SOME.
why do you think some bigger trucks have 2 speed rear ends??
I used to drive a White .. 5 speed transmission and a Eaton 2 speed rear end. I wish pickups had 2 speeds...
