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Towing 4th Gen Dodge Ram Towing Questions


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  #1  
Old 08-04-2014, 11:34 PM
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skaling skaling is offline
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Default 3.21 towing

Just did 1200kms, 6500lbs jayco 26 bh(30' hitch to bumper). Family of 4, 2 bikes and 60lbs of propane tanks in bed of truck. average speed of 84km/h. Long 7% grade hills both way, mixed with small and medum hills and curvy roads..
22.1 L / 100km. tow/haul mode,Mostly 5/6th gear(100km/h @ 2000rmp) 4th on the long hills(80km/h @2000rmp or 100km/h@ 3500rpm). On the flats with no wind it went into 7 th a few times..
Oil temp stayed study @110*C or 117*c with A/C on(maxed at 126*c on long hill)
Tranny temp stayed between 84* c and 90*C
Coolant was always 15-20*c below oil.

Despite what people say about the 3.21 not being good at towing, this truck was a champ.

Here is a graph of altitude changes.
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Last edited by skaling; 08-05-2014 at 08:34 PM.
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  #2  
Old 08-05-2014, 10:15 AM
Hermes1 Hermes1 is offline
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Nice report on your experience. I suspect you have the 8-speed which is a big plus with the 3:21. Your Ram, as you have found out, will certainly do the job.
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Old 08-05-2014, 01:10 PM
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Yes, 8speed tranny. It's so smooth on the shifts!!
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Last edited by skaling; 08-05-2014 at 08:35 PM.
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Old 08-23-2014, 10:34 AM
mbarclay mbarclay is offline
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Sweet truck! Love the white sports. My 12 black sport has 3.21 gears as well. Wish it had 3.92 and LSD but it does fine without
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Old 08-23-2014, 11:33 AM
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I tow with the 3.21, 3.6l, and 8 speed. Does a great job.
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Old 08-23-2014, 09:23 PM
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Great report. Congrats on the truck.
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Old 09-18-2014, 09:29 PM
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It's great to see trucks with the 3.21 gearing towing so well. I purchased with 3.21 because all I really tow is what's pictured. I'd be surprised if total weight hit 1800lbs.

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Old 10-01-2014, 12:33 AM
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Quote:
Originally Posted by HEMI-675 View Post
It's great to see trucks with the 3.21 gearing towing so well. I purchased with 3.21 because all I really tow is what's pictured. I'd be surprised if total weight hit 1800lbs.

My kids power wheels can pull that
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Old 10-01-2014, 06:03 AM
HEMI-675 HEMI-675 is offline
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Quote:
Originally Posted by skaling View Post
My kids power wheels can pull that
Exactly my point!

We plan to get a hybrid camper one of these days. Weight dry is something around 4500.
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Old 06-10-2015, 10:32 PM
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I was comparing the 6-speed and 8-speed transmissions and was surprised to see the ultra low 1st gear in the 8-speed (4.71 vs 3.00 in the 6-speeds for 1500 RAMs).

65RFE 3.00(1st), 1.67(2nd), 1.50(3rd), 1.00(4th), 0.75(5th), 0.67(6th)
8HP70 4.71(1st), 3.14(2nd), 2.10(3rd), 1.67(4th), 1.29(5th), 1.00(6th), 0.84(7th), 0.67(8th)

6-speed (3.92) and 8-speed (3.21) total reduction in various gears:

8-speed: 3.21 x 4.71 = 15.12 (1st), 10.08 (2nd), 4.14 (5th), 3.21 (6th), 2.70 (7th), 2.15 (8th)
6-speed: 3.92 x 3.00 = 11.76 (1st), 6.55 (2nd), 3.92 (4th), 2.94 (5th), 2.63 (6th)

So this looks like instead of using a 6-speed with 3.92 gears, I could use an 8-speed with 3.21 gears and just use a lower transmission gear on the highway. For example if 5th works fine with the 6-speed and 3.92 gears, use 6th with the 8-speed and 3.21 gears. First gear total reduction is actually more with the 8-speed and only 3.21 rear gears.
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