Looking to tow 8000 lb trailer with a Hemi
I am considering an 8000 lb TT (loaded weight) that I would like to pull with a 3/4 Ram with a 5.7 Hemi. I have WD and sway control on both sides. Anyone have a similar set up and do you tow okay with it.
Forum Discussion
ib516 wrote:
It'll do it no problem. I tow 11,500 - 12,000 with mine.
Your tag says you have a 6.4L Dodge 2500. Quite a bit different than the 1500 w/5.7L!- It'll do it no problem. I tow 11,500 - 12,000 with mine.
4X4Dodger wrote:
AH64ID wrote:
345hp should do a lot better than 35 up a 6% grade with only 5000lbs behind it.
The 5.7L hemi is rated at 383 HP and 400 LB.ft of Torque. and yes it has power to spare.
Now it is, but that comment was in response to mileshuff's comment on his 04 Duramgo which was rated at 345/375.AH64ID wrote:
345hp should do a lot better than 35 up a 6% grade with only 5000lbs behind it.
The 5.7L hemi is rated at 383 HP and 400 LB.ft of Torque. and yes it has power to spare.mileshuff wrote:
AH64ID wrote:
Where did you think redline was? 35 in 3rd is roughly 1400 rpms, which isn't working that hard. 2nd Prime would have been around 2100 and 1st at 35 is only 4200
I'd say your gearing is vastly different than my 2004 Durango or your figures are way off. As for heat, not sure where you live but towing up steep mountain grades in 100-110F heat isn't so easy at times. Some TV's certainly do better than others with heat. Most here add aux tranny and/or engine coolers. The Durango ran hot, my 2500 diesel towing 11,000lbs runs cool.
Those are calculated based on the Dodge transmission used in the 2004 Durango Hemi and the 3.55's in your sig. I also used OEM tire size. Not sure what to tell you, but unless you had a different trans or tiny tiny tires those numbers are correct. It sounds like you were not aware of the gear you where using.
Dodge 545RFE (the only 5 speed used on a 2004 Durango)
1st 3.00:1
2nd 1.76:1
2ndP 1.50:1
3rd 1.00:1
4th 0.75:1
5th 0.67:1
Gear Ratio 3.55:1
Standard Tire size 245/70R17 684 rev/mile
Using those numbers it is easy to calculate rpms based on a locked torque converter. An unlocked torque converter will increase rpms by a few hundred.
Lets then look at the peak torque rating of 4200 rpms.
1st 35 mph
2nd 62 mph
2ndP 69 mph
3rd 104 mph
4th 138 mph
5th 155 mph
Even if you had 3.92's you wouldn't be anywhere near redline at 35 in 1st gear as it would be 4750 plus the torque converter slippage.
So how far off are they? Do the math yourself and see that you where not in 3rd gear and probably not even in 2P if you thought a downshift would send you thru redline.
Yes ambient temp makes a big difference on the cooling system, but so does running with a torque converter unlocked.
The HD trucks of the same year with the Hemi did have a larger cooling system but only 15% larger.
How many rpms where you turning at 35?AH64ID wrote:
Where did you think redline was? 35 in 3rd is roughly 1400 rpms, which isn't working that hard. 2nd Prime would have been around 2100 and 1st at 35 is only 4200
I'd say your gearing is vastly different than my 2004 Durango or your figures are way off. As for heat, not sure where you live but towing up steep mountain grades in 100-110F heat isn't so easy at times. Some TV's certainly do better than others with heat. Most here add aux tranny and/or engine coolers. The Durango ran hot, my 2500 diesel towing 11,000lbs runs cool.gcloss wrote:
4X4Dodger wrote:
Road Phantom wrote:
I am considering an 8000 lb TT (loaded weight) that I would like to pull with a 3/4 Ram with a 5.7 Hemi. I have WD and sway control on both sides. Anyone have a similar set up and do you tow okay with it.
The Dodge catalog which lists the J2807 specs for all it's trucks indicates that you can tow anywhere from 11,020 to 13,870 depending on how your 3/4 ton is equipped.
My 2500 Dodge Ram 2014 tows my 2004 31 foot Gulfstream Innsbruck like it's not there most of the time (unless I have a severe head wind) I recently hauled it up and over Loveland Pass in CO (11,000 ft) with no problem and passed most traffic; Trucks and TV,s with Trailers doing a consistent 60-63 mph occasionally dropping down to about 55 on the steepest parts. I had four passengers 2 dogs, two heavy tool boxes and a generator in the truck. And I got 7.7 MPG on that leg of the trip. (Determined by actual math not the electronic MPG gauge)
You will be fine.
4x4Dodger ... just out of curiosity, what engine and rear ratio do you have?
5.7L and the rear end is 3.73. With the new electronic multi speed (6 and 8)transmissions, rear end ratio is not the big determiner it once was in towing performance. The hit to fuel economy I dont think is worth it.4X4Dodger wrote:
Road Phantom wrote:
I am considering an 8000 lb TT (loaded weight) that I would like to pull with a 3/4 Ram with a 5.7 Hemi. I have WD and sway control on both sides. Anyone have a similar set up and do you tow okay with it.
The Dodge catalog which lists the J2807 specs for all it's trucks indicates that you can tow anywhere from 11,020 to 13,870 depending on how your 3/4 ton is equipped.
My 2500 Dodge Ram 2014 tows my 2004 31 foot Gulfstream Innsbruck like it's not there most of the time (unless I have a severe head wind) I recently hauled it up and over Loveland Pass in CO (11,000 ft) with no problem and passed most traffic; Trucks and TV,s with Trailers doing a consistent 60-63 mph occasionally dropping down to about 55 on the steepest parts. I had four passengers 2 dogs, two heavy tool boxes and a generator in the truck. And I got 7.7 MPG on that leg of the trip. (Determined by actual math not the electronic MPG gauge)
You will be fine.
4x4Dodger ... just out of curiosity, what engine and rear ratio do you have?Road Phantom wrote:
I am considering an 8000 lb TT (loaded weight) that I would like to pull with a 3/4 Ram with a 5.7 Hemi. I have WD and sway control on both sides. Anyone have a similar set up and do you tow okay with it.
The Dodge catalog which lists the J2807 specs for all it's trucks indicates that you can tow anywhere from 11,020 to 13,870 depending on how your 3/4 ton is equipped.
My 2500 Dodge Ram 2014 tows my 2004 31 foot Gulfstream Innsbruck like it's not there most of the time (unless I have a severe head wind) I recently hauled it up and over Loveland Pass in CO (11,000 ft) with no problem and passed most traffic; Trucks and TV,s with Trailers doing a consistent 60-63 mph occasionally dropping down to about 55 on the steepest parts. I had four passengers 2 dogs, two heavy tool boxes and a generator in the truck. And I got 7.7 MPG on that leg of the trip. (Determined by actual math not the electronic MPG gauge)
You will be fine.mileshuff wrote:
AH64ID wrote:
Tow how you want to, but it is not a fair review if you dont feel like pushing your rig within its design specs and then saying it wasnt enough. It may have been enough but sounds like you didn't want to push it.
You are correct. If I wish to downshift and run past red line I could probably go faster. Good idea? How does very high temps effect engine and tranny? Good for it?
You cannot run past redline on a modern engine, not with an automatic transmission anyhow.
Where did you think redline was? 35 in 3rd is roughly 1400 rpms, which isn't working that hard. 2nd Prime would have been around 2100 and 1st at 35 is only 4200 which is the peak torque rating. Peak hp was as rated at 5200m redline was either 5800 or 6000 depending on the source but it doesn't much matter as the ECM won't let you operate there. (The rpms will be a little higher than listed due to the torque converter slippage).
If you had to pull 6% grades in 1st with 335/370 and a 5K trailer something was wrong. What temps where you hitting? Trans heat is 1st gear is probably due to a lack of tw converter lock and going faster probably would have cooled the trans with a locked converter.
