falconbrother wrote:
I have a buddy that tows with an Expedition and he's heavier than my rig. I'm towing with a 5.3 Suburban. My next TV will, in all likelyhood, be an Expedition. Totally subjective observation here.. The Ford engine/transmission package gets the power to the road better. The GMs have weaker differentials than Ford. I work at a community college with a robust auto diesel program. I always ask the students who work at transmission shops what they observe about Ford v. Chevy on overhauls and repairs. They always say that they see more GM's needing overhauls. Not scientific research but, just another rock on the pile. The GM design parking brakes have some suck unless they are perfectly adjusted, which I have finally learned how to do. I tend to keep a vehicle a long time. I love my old Suburban but, between GM and Ford I think Ford wins for towing a travel trailer. My observations have only been with the five liter drive trains. The ecoboost ought to really up the game of the Expedition. The undercarriage of the Suburban seems well built. The 5.3 is a great engine and built to last.
My brother is in construction and puts the miles on work trucks. For long term reliability he seems to prefer Chevrolet over Ford. His last Ford was blowing out spark plugs from time to time on the 5.4. I'm sure they addressed that issue but, it soured him to Ford. He's driving Chevrolets now and has had zero issues.
I just went from a '03 5.3L Tahoe with a 4L60E and 3.73 gears to a '12 crew cab Duramax/Allison. The main problem towing with the Tahoe was really the big jump between 2nd and 3rd on the transmission, and the soft coil spring rear. I never had any reliability issues (had the Tahoe 190k miles, about 50k of that towing), but man the Duramax just doesn't even break a sweat and it's so much more relaxing to tow with because it's always in the right gear. The transmission really does make a difference to how well it feels towing. The Tahoe was a very comfortable daily driver but towing up long grades was just tiring, and it pretty much got 9.5 mpg towing no matter what speed. I really like the 5.3L Vortec engine but the transmission is just so-so. If I could have one with a 6 speed manual I would.