Ram 3.21 rear end towing

lbbq wrote:
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 with traffic? Say 55 mph. I understand that actual weight will make a difference. Assume a 5.7 Hemi, 4x4, eight speed transmission. I would prefer a 2500 but the 6.4 (as well as 3.92 gearing in the 1500) seem to be non existent for 2015. Thank you for any information you may provide. I did a search before posting and did not find anything.

As an owner of a 2014 with 3.21 for a 5500lb GVWR trailer (4500 actual), with frequent mountain/hill towing I would suggest against it. Can you do it? Sure, of course.

I spent a lot of time locking out overdrive normally (non-towing) and keeping her in 5th (towing, where she bags into 3rd/4th on her own). She loves to pick gears that are out of the power band (~1500 lazy rpm) left to her own devices.... which is great if you are a high mileage flatlander.

Your question was keeping up to traffic though on ~7%er's.. yep, you will. Just be prepared to either thumb shift or press down on the right foot.