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**sourdough** · 08-12-2018, 08:45 AM

I own a 6.4 hemi. The limit for the 6.4 with 3.73 is 12,500 and with the 4.10 it's 15,200?? (from memory). I have the 3.73 and my trailer is 10k gvw, usually loaded about 9250 - 9400. The 6.4 does a great job with it. I have toyed with the idea of letting it try to pull up to the max tow weight but I think it's happiest about where it is. I think it would struggle greatly in the Rockies with 12,500 behind it. The 4.10 would be better and I'm sure would handle it fine (12,500) but I think that would be putting it at it's limit.

So, would it be a upgrade/downgrade? I think the ultimate solution is the combo you listed, Cummins/Aisin but at a hefty price tag. The 6.4 with the 4.10 would do the job IMO but not as easily as the diesel. I would rule out a 3.73 personally.

08-12-2018, 08:45 AM	#3
sourdough Site Team Join Date: Feb 2014 Location: W. Texas Posts: 17,702	I own a 6.4 hemi. The limit for the 6.4 with 3.73 is 12,500 and with the 4.10 it's 15,200?? (from memory). I have the 3.73 and my trailer is 10k gvw, usually loaded about 9250 - 9400. The 6.4 does a great job with it. I have toyed with the idea of letting it try to pull up to the max tow weight but I think it's happiest about where it is. I think it would struggle greatly in the Rockies with 12,500 behind it. The 4.10 would be better and I'm sure would handle it fine (12,500) but I think that would be putting it at it's limit. So, would it be a upgrade/downgrade? I think the ultimate solution is the combo you listed, Cummins/Aisin but at a hefty price tag. The 6.4 with the 4.10 would do the job IMO but not as easily as the diesel. I would rule out a 3.73 personally. __________________ Danny and Susan, wife of 56 years 2019 Ram 3500 Laramie CC SWB SB 6.4 4x4 4.10 2020 Montana High Country 331RL