RAM 3500 NEW 6.7L Cummins LOSING Towing Capability?? *Diesel Mechanic Explains*

I review the New 2025 RAM 6.7L Cummins Diesel 2500/3500 HD Trucks and discuss Max Towing figures, Max Payload numbers, Pricing and talk about the new axle gearing (3.42s) now available moving forward with the new 2025 Cummins trucks and how it will affect performance.

FULL 2025 6.7L Cummins Update Video -    • RAM 2500 UPDATED 6.7L Cummins Diesel Engin...  

What I Use:
7.3L POWERSTROKE
Engine Oil - https://amzn.to/3ZLIWBD
Engine Oil Filter - https://amzn.to/4gHTwRb
Fuel Filter - https://amzn.to/3VPim9H
Gear Oil - https://amzn.to/3DAdWx1
Grease - https://amzn.to/3BpoHBW

6.4L HEMI
Engine Oil - https://amzn.to/4aEbtNE
Engine Oil Filter - https://amzn.to/3J1nDUM
Engine Air Filter - https://amzn.to/3JMmMVV
Cabin Air Filter - https://amzn.to/3JMZAHh
Gear Oil - https://amzn.to/3PoIcxa
Penetrating fluid - https://amzn.to/3EOclkx
Rust protection - https://amzn.to/3Zo0Rh6

Towing Gear:
10 ton Pintle hitch (2.5" receiver) - https://amzn.to/3r7Axvm
7 Ton Adjustable hitch (2" receiver) - https://amzn.to/46i2iAf
Adjustable Pintle hitch mount (2.5" receiver) - https://amzn.to/3RqHGS3
15 Ton Pintle hitch - https://amzn.to/45SaCqv
10,000lbs Tie Down Straps - https://amzn.to/3ZBnxeh




Alright so we now have more or less the full picture of these new HD RAM truck with the new updated 6.7L Cummins. the first thing I talk about the the new Helical cut gear train on the updated 6.7L cummins engine. There are a number of benefits to helical gears like noise reduction and vibration and strength. the big downside I see include added weight.

We know that this engine is going back to cast Iron block from the compact graphite Iron meaning the engine is already getting heavier and these gears are only going to add to it.

The reason why this weight could be a problem is because the payload numbers on the Ram 2500s historical have been very low in comparison to the competition like Ford and GM. Ram did bump up their GVWR from 10,000lbs to 10,190 which should help a little but overall the payload figures with a cummins engines have dropped from 3150lbs to 2750lbs which isnt going to make people happy.

Next is the gearing options (or lack off) that we are getting with this new cummins engine. 3.42 gears which I do not love, I wish Ram had included a higher gearing options for the 3500's.

Next is towing, the 3500's max towing figure actually dropped by around 500lbs which is a odd, expecially considering getting a brand new transmission but I would suspect the 3.42 gears impacted the lower tow rating.

for the towing in the Ram 2500 with the cummins engine it has basically remained the same going from 19,990lbs to 20,000lbs but we have to remember we are now paying an extra $3,000 and adding a new transmission with an extra 60 hp and 225lb-ft of torque so I would of expected to see a greater gain in towing capacity.

Lastly is Price and well these trucks are not cheap. a lower trim level big horn with no options and the cummins engine comes to $70,000 adding taxes and financing we are looking at around $90,000 which is just not that affordable.

the story only gets worse for Canada with the exchange rate likely pushing these trucks well over $100,000

Let me know what you guys think!



00:00 - Detroit Auto Show
01:09 - Helical Cut Gear Train
03:32 - Max Payload Figures
05:59 - Axle Gearing (3.42)
08:54 - Max Towing Figures
12:38 - Pricing $$