3.21 gear ratio - anyone actually towing with it?

[AFMoulton]

Yes it will change


Sent from my iPhone using Tapatalk

 

[TerraNewf]

I tow my boat with ease. 2015 Robalo R200 with 150 Yamaha 4stroke and tandem axle Trailer. It's 4300 #'s with engine and a full tank of gas. My truck has the 3:21 rear and I can't really see the need for a different diff.

 

[kbtulsa]

I just towed my Jayco 28RLS, with my 2017 Ram 1500 quad cab express. Towed from Tulsa, Ok to Wolfeboro,NH and back. 3:21 gears Hemi, No problems what so ever. Not the best gas mileage, but it never luged or had any problems in the mountains. I was convinced by everyone on here that it wasnt going to work. It had plenty of power and no wag going down the road. At 70 it got 7.5 mpg, at 65 it got 8.5 mpg and at 60 it got 10 mpg.

 

[StinkyHotChocolate]

I tow my 21' Coleman CT16FBS camper (approx. 4k lbs loaded). Recently went on a 400 mile trip, averaged 12.0 mpg according to EVIC. Towed at 60 mph with no issue, plenty of power, in 7th gear most of the time.

2013 Hemi, 3.21 gears, leveled on 35s.

 

[69GWC]

I have found that most people that put down the 3:21s do not own a truck with 3:21s.
Before the 8sp I would totally agree but the 8sp makes the difference.

Now I do agree that you would still be better off with 3:92s but its not going to be a do or die situation the 3:21s work just fine.

 

[911ems]

I just towed my Jayco 28RLS, with my 2017 Ram 1500 quad cab express. Towed from Tulsa, Ok to Wolfeboro,NH and back. 3:21 gears Hemi, No problems what so ever. Not the best gas mileage, but it never luged or had any problems in the mountains. I was convinced by everyone on here that it wasnt going to work. It had plenty of power and no wag going down the road. At 70 it got 7.5 mpg, at 65 it got 8.5 mpg and at 60 it got 10 mpg.

What’s the weight on the Jayco loaded? What hitch are you using? My only concern is the mountains. On flats the truck has done wonderful, but I like hearing yours did well in the mountains!


Sent from my iPhone using Tapatalk

 

[911ems]

Just got back from 400 miles this weekend with the 3.21. Locked into 7th and it pulled the 7000lbs beautifully. First trip with the tow mirrors and what a difference!





Sent from my iPhone using Tapatalk

 

[911ems]

Sent from my iPhone using Tapatalk

 

[AFMoulton]

Sent from my iPhone using Tapatalk

Is that Granite Crystal?!?


Sent from my iPhone using Tapatalk

 

[Ramnewbie]

What would it cost to switch out to 3:92's? Just my thinking but if you've got it in you're head that you want 3:92's you ain't never gonna be satisfied with the 3:21's no matter what. I just no me that whenever I get my mind set on something that no matter what nothing else will work.

Sent from my XT1650 using Tapatalk

 

[AFMoulton]

Parts alone are about $2,000


Sent from my iPhone using Tapatalk

 

[Ramnewbie]

Wow, I didn't realize it would be that expensive.

Sent from my XT1650 using Tapatalk

 

[69GWC]

Pretty much gotta buy a front diff, then the rear gears.

 

[Ramnewbie]

Oh hell, I wasn't even thinking about the front end, my mind is stuck on 2 wheel.

Sent from my XT1650 using Tapatalk

 

[69GWC]

Yeah a 2wd would be cheap to do.

 

[AFMoulton]

Unless you can find a wrecked one with a good 3.92 up front then you could probably save $1000 or more


Sent from my iPhone using Tapatalk

 

[69GWC]

https://www.moparpartdepot.com/oem-...sZS1hbmQtY2FycmllciZtPSZhPSZvPSZ5PSZ0PSZlPQ==

 

[BrianandChrissy]

Yessir. My 2016 8spd, 3.21 rear regularly tows my tandem axle trailer. Now that I have the air bag 1000 kit, and the trailer brake, I am feeling real happy. As for pulling? I regularly have between 5-7000 lbs being pulled and it does it effortlessly. Just remember to put it your truck in haul/tow mode.

Sent from my Z982 using Tapatalk

 

[TerraNewf]

I tow this beauty with no problem. The hull is 3000#'s plus the engine (150hp Yamaha 4 stroke) fuel and trailer. I couldn't be happier with the 3:21 diff. Plus this truck can drop it in the ocean and retrieve it with ease.

 

[Jimmy1439]

No issues

I know this thread has been around a while, but I wanted to add a positive experience.

Details: Truck: 2016 Big Horn 5.7 2wd w/3.21 gear, 8 speed XMSN. Bridgestone Dueler H/L Alenza tires. EAZ-Lift weight distribution hitch w/bar style sway bar. Camper: Flagstaff 27 RLWS, 6300 dry, 620 tongue, 32 feet long hitch ball to back bumper.

1800 mile trip from West TN to Chesapeake City, M.D. and back over Thanksgiving week.

I carefully set up the hitch based on instructions, videos, forums, etc. We also made sure not to overpack because I know how easily you can load up a camper. Hitch weight doesn't include 2 propane tanks and battery, so tongue weight is no issue. It actually was slightly smoother with water in the tank.

First day was 20-30 mph winds. Was able to do 60-63 mph comfortably. Slowed a little when trucks passed. The rest of the trip was 65-70 mph, occasionally topping 72. I honestly had no issues at all with the tow. Some sway was present, as expected, but nothing scary at all. I topped a hill once on the first day with a truck next to me and the anti sway kicked in unexpectedly, but no biggie. On the rest of the trip, speed was based on highway conditions. I-81and I-495 have some truck rutting that slowed us a bit.

The XMSN did great. I put it in Tow/Hawl and never messed with it. Smooth as glass. Temperature was pretty consistent around 195. Saw 203 in the mountains around Knoxville.

In case anyone is curious, we averaged 9.5 mpg.

I'll answer the obvious question before it's asked. I spend a lot of time on the road, so I wanted the Ram ride and the 3.21 mileage. We don't tow often. My best advice is to just be patient. You're not gonna anywhere fast with a camper. I'll get the recommended 2500 when I retire.

I'm a fan of the truck with the 3.21.
Jim