I think that quote is not done quite correctly 6686L. 'dunno; Anyway you can edit me out of that?
show me a law about MFG GCWR recommendations.... according to the FMCSA...=============================================
Yes - I know a lot of folks like you - we have some posting in here; they are satisfied their knowledge of engineering and metallurgy is superior to the factory folks who design & engineer our trucks.
No, I am not personally in law enforcement, so the term "weight police" does not apply to me personally. More and more states are equipping their law enforcement to enforce weight limitiations - glad of that; the more they get over-loaded trucks impounded and off the road, the safer my family and I are. As for your other comments - no, I am not exactly "late to the game"...I started driving multi-axle heavy vehcles in 1956. And no, I do not try and tow 30,000 lb. or so weights with my own truck - if I had to tow a load like that, I'd buy a truck "rated" for that kind of load.
So the "bottom line" answer to the initial question is - "no, I have not re-geared my truck from the stock 3.7 final drive". The "higher" (as in lower numerically) the final drive ratio, the lower the engine rpm. Modern transmissions, in particular the Allisons behind our Duramax's, are quality well-designed units. Operated within their design limitations, I cant imagine anyone who respects the laws of physics and safety concepts wanting to change.
===========================================have tried it with tow setting on and off. Prefer the Towing on as it just seems the engine/tranny seem happier, but am a rookie so asking the basic questions as well.
Tow mode - the button at the end of the shifter which selects P|R|N|D|L|1. In the owners manual, they call this button the selector for "Tow/Haul Mode". They also recommend that I press the Exhaust Brake button when I use the other button. Goes on to tell me that by pushing that button, it will adjust my shift pattern to reduce shift cycling. Also give me increased performance, vehicle control, and enhanced engine and transmission cooling.===========================================
May I suggest clarification on the "tow mode" function?
Sorry buddy, never saw that there was more action on this thread. I rarely get on here. Just signed in to look for something else and saw in my notifications that I was quoted in this thread.------------------------------------
You are pulling 30,000 lbs with a older 3500 with 440,000 miles on it, and going 80 mph?
Hopefully, you don't do that near me - sounds like a combination of total irresponsibility towards your fellow highway users, combined with a lack of understanding of the capacity info. of your series of truck.
Hopefully, you will come to your senses and buy a larger, heavier truck whose towing capacity meets your requirements.
As a side note, assuming your existing truck has an Allison automatic transmission, depending on the year and model it will have at least 5 forward speeds in high gear. Yes, when running at, near, or above rated towing loads, you will see slowing on grades. Again, if you cannot deal with the laws of physics causing your existing truck to slow down when pulling that kind of load up long up-grades, sounds to me like you should consider a larger, heavier tow vehicle matched to the weight you want to pull.
34340....meh, do that all the time.
Same truck...just more chrome.
Not @ 80, but not far below. :howdy
Yeah speed limits are pretty clearly just recommendations.Well, yeah they kinda are.