3.21 vs 3.55
Ram has built a number of 1500s, 5.7 hemi's with the new 8spd trans. Some or most of them have the 3.21 gears. The tow rating is about 2,000lbs less than the same truck with 3.55s regardless if the tr...
Forum Discussion
It appears from the numbers you posted, an 8 speed with a 3.21 has better torque multiplication than a 6 speed with a 3.55 or even 3.73 all the way up to 6th (gear to gear). It isn't until 7th gear that the 3.21 would be worse then a 3.73 in 5th gear. But at that point you drop the 8 speed to 6th and are better.
It may just be a dependability thing that Ram doesn't want you towing say 9000# in 8th gear with the 3.21 axle (while a 3.55 axle will do it easier).
It may just be a dependability thing that Ram doesn't want you towing say 9000# in 8th gear with the 3.21 axle (while a 3.55 axle will do it easier).
