Ram 3.21 rear end towing
Hello! New guy here with a question. I'm looking at Ram 1500's and was wondering about the 3.21 rear end. Will this ratio be able to tow a TT with a GVWR of 7500lb up grades of 7% and still keep up wi...
Forum Discussion
rjstractor wrote:
Considering that the truck in question has an EIGHT speed transmission, the 3.21 gears may be suitable for your application. Many get fixated on the rear axle ratio alone, which hearkens back to the days when transmissions had only 3 speeds. Towing the load in question, this truck with 3.21 rear axle gears may cruise the freeway in 6th gear instead of 8th, but may otherwise provide decent performance. Having said that, trucks with a numerically higher gear ratio will have higher tow ratings, but that doesn't mean that a 3.21 axle ratio will not provide good performance with the 8 speed transmission.
X2
You will most likely have to pull the hills in a gear lower than 8th even with the 4.1 gear.
You will find the overall ratio for the 4.1 in 8 th gear will be almost the same as the 3.21 is in 7 th gear.
So when pulling the big hill it does not matter if you do it in 3 rd gear with the 3.21 vs 4 th gear with the 4.1.
This is true as the overall ratio in 3 rd gear and a 3.21 is almost the same as 4 th gear with the 4.1.
You will be putting about the same horsepower to the ground as the engine rpm will be very close in both cases.
