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Difference between 3.21 and 3.92 Axle Ratios


This is a discussion on Difference between 3.21 and 3.92 Axle Ratios within the Towing & Hauling forums, part of the 4th Gen : 2009 - Present category!
I'm about to get a 2014 1500 LoneStar with a 3.21 Axle Ratio (sweet deal for $23,000 with 19k miles). ...


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Old 12-06-2016, 11:33 AM   #1 (permalink)
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Default Difference between 3.21 and 3.92 Axle Ratios
I'm about to get a 2014 1500 LoneStar with a 3.21 Axle Ratio (sweet deal for $23,000 with 19k miles). Only problem is that it has the 3.21 axle ratio.

Question: Does it make that much of a difference? Some charts I'm looking at are giving me a 500lb pulling capacity difference, some are giving me 2,000lbs.

I'll own a small utility trailer dealership and although most of my trailers are delivered to me, I'll be pulling a stack of 3-4 trailers 2-3 times per month (8,000 lbs is the most I'll probably pull) on flat terrain (I'm in N. Texas).


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Old 12-06-2016, 12:20 PM   #2 (permalink)
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need more info on the truck to determine a max tow capacity. considering crew cab 4x4, 8000lbs could already be pushing it (legally). the difference in tow capacity between the two gear ratios is in fact around 2000 lbs. 3.21 to 3.92 is a big difference. whether or not its important to you, thats something your going to have to determine.
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Old 12-06-2016, 12:27 PM   #3 (permalink)
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Thanks for the response. It is a 4x2 Quad Cab w/ a 6'4" Box. I'll be using a weight distribution hitch and am looking into whether or not to put in an air bag suspension kit and the such.

I really wish it was the 3.92, but I don't think I can pass this up at the price.
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Old 12-06-2016, 12:29 PM   #4 (permalink)
 
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RAM Trucks - Towing & Payload capacity

click on the red box "lookup my vehicle" on the right side of yer screen, plop in yer vin, and yer in the know of how much u can tow!

came in handy while I was at dealerships looking at used trucks, same with the window sticker lookup site as well. super handy to see all the options the truck shipped with. just change ADDYOURVINHERE to your vin.

http://www.chrysler.com/hostd/window...ADDYOURVINHERE


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Old 12-06-2016, 12:41 PM   #5 (permalink)
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Originally Posted by TruckNoob View Post
Thanks for the response. It is a 4x2 Quad Cab w/ a 6'4" Box. I'll be using a weight distribution hitch and am looking into whether or not to put in an air bag suspension kit and the such.

I really wish it was the 3.92, but I don't think I can pass this up at the price.
an 8000 lb trailer is going to put you right at max capacity. are you comfortable with that? if i had to do that 2-3 times a month, id probably re-consider my purchase.
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Old 12-06-2016, 01:14 PM   #6 (permalink)
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The warm fuzzy feeling you get from finding a great price will fade long before the regret of not getting what you really want. That 2000 lb cushion is worth a few extra bucks.
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Old 12-06-2016, 02:01 PM   #7 (permalink)
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You guys are killin me. I was so sold and set on that truck. Now I'm seriously reconsidering. Its now a matter of whether or not I get the 3.92 or just decide to pull smaller 6500lb loads.

Thank you for the advice! I've been on these forums a lot the past week or two as an observer. I really look forward to being a part of the community.
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Old 12-06-2016, 03:13 PM   #8 (permalink)
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I have a 2016 1500 5.7 crew cab 4x4 with 8 speed and 3.21 rear. I tow a 26 ft travel trailer weighing 6000 lbs loaded with no problems.
It tows better than my 2012 did with the 6 speed and 3.55


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Old 12-06-2016, 05:58 PM   #9 (permalink)
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Ok, while doing more research it looks like I can just get new gears put on for under $1000. Is it as simple as that?
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Old 12-06-2016, 06:11 PM   #10 (permalink)
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Originally Posted by TruckNoob View Post
Ok, while doing more research it looks like I can just get new gears put on for under $1000. Is it as simple as that?
Pulling the trailer, yes. Legally no. Legally no matter what gears you put in it the truck is still rated for the original rating. But, the truck you were looking up will pull that 8000 pound trailer with no problem even though you're at the limit. Why not shop for a 2500 and then you'll be safe all the way around. I pull a 7300 pound trailer with my 1500 with 3.21 gears, I have pulled from Georgia to South Texas with no problem. I can tell though, with handling, the truck is pushing it.
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