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Ford 7.3 vs GM 6.6 gas 2500 trucks

Old 10-30-2020, 05:39 PM
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Default Ford 7.3 vs GM 6.6 gas 2500 trucks

Iím looking at the Ford 7.3 and GM 6.6 gas trucks. Both are new design engines. The only possible negative thing I see for the GM is that they chose direct injection.
i know the 7.3 puts down better numbers but Iím looking at longevity.
What are your thoughts on these 2 powertrains?
Old 10-30-2020, 06:30 PM
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if the new Chevy is anything like the 6.0 in the dependability department It will be awesome.
love my 6.0ís but the 6 speed trucks could use some help in the grunt department
pushing 900 thousand miles between 5 of them and a lot of those miles loaded with equipment in and out of construction sites.
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Old 10-30-2020, 06:35 PM
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Fords 7.3 ďGodzillaĒ wins no contest as long as you can stomach the extra $$ over the GM offering imo. Lower compression ratio, port injection, wider bores and bore spacing, 6 bolt mains with a forged steel crankshaft and piston oil cooling jets. Itís built like a Diesel without all the boost. No Replacement for Displacement when it comes to a 1 ton gas job.

Last edited by JExpedition07; 10-30-2020 at 06:56 PM.
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Old 10-30-2020, 07:20 PM
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Granted I only have 1500 miles on my 7.3L but itís a beast. Couple it with a 3.73 or 4.30 you can move whatever you want. Put a 5 Star Tuner on it and itíll put a smile on your face, put a cat back exhaust and it sounds good too. Not a bad thing about an old school truck engine. Oh and it hadnít been in the shop yet either, unlike the GMC from earlier this year.
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Old 10-30-2020, 07:33 PM
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In for the ride. 7.3 fan but don’t own one yet.
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Old 10-30-2020, 08:35 PM
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The direct injection is one of the reasons why I bought a 7.3 Ford. Port injection is much simpler and cheaper to repair should the need arise.
Old 10-30-2020, 08:48 PM
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GM truck owner for 35 years. Bought new truck this spring; 2020 F350 6.2l ten speed. Go drive both decision will be obvious. GM dropped the ball when they put a six speed with the new engine. Lost my business this time. The new Fords are just awesome. In case I forgot to mention; drove nothing but GM for 35 years.
I haul TC, tow boat, and tow AirStream. 6.2 has been great.
Was interested in new 7.3 but inventory very limited this year.
No regrets on 6.2
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Old 10-30-2020, 09:57 PM
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Originally Posted by BillTex View Post
GM truck owner for 35 years. Bought new truck this spring; 2020 F350 6.2l ten speed. Go drive both decision will be obvious. GM dropped the ball when they put a six speed with the new engine. Lost my business this time. The new Fords are just awesome. In case I forgot to mention; drove nothing but GM for 35 years.
I haul TC, tow boat, and tow AirStream. 6.2 has been great.
Was interested in new 7.3 but inventory very limited this year.
No regrets on 6.2
The 6.2 Ford can also be had with your choice of 3.73 or 4.30 with the 10 speed. GM only offers 3.73 and a 6 speed.

Last edited by JExpedition07; 10-30-2020 at 10:03 PM.
Old 10-31-2020, 03:44 AM
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Pulling the same trailer up the Ike gauntlet the 7.3 took 8 minutes while the 6.6 took 11 minutes...pretty significant difference
Old 10-31-2020, 07:04 AM
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If I had to pick between the two, 6.6, specifically because itís plenty of motor for my needs and has IFS. I do not want a solid front axle for my needs.
Old 10-31-2020, 07:26 AM
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Direct injection would not scare me away. It's a mature technology, proven and reliable. Transmission performance is what you should be paying attention to.
Old 10-31-2020, 08:12 AM
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I drove both, and felt the fit And finish on the Ford was much better. There were way too many things on the GM that screamed not well put together. If simple things like having a cover over the gas cap compartment and loose wiring in the engine compartment (wires by design) are not right, it made me wonder what other corners were cut. I have absolutely no complaints about my truck in 8000 miles. F250 7.3 with 4.3 rear end.
Old 10-31-2020, 08:42 AM
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The 6.6 is a dog, coupled with the antique 6 speed transmission
Old 10-31-2020, 08:49 AM
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Originally Posted by Konrad View Post
I’m looking at the Ford 7.3 and GM 6.6 gas trucks. Both are new design engines. The only possible negative thing I see for the GM is that they chose direct injection.
i know the 7.3 puts down better numbers but I’m looking at longevity.
What are your thoughts on these 2 powertrains?
IMO no competition! GM & Ram are sucking hindmost when it comes to their gas HD offerings vs Fords Godzilla! It was built/engineered to be a truly super duty powerplant and done so with reliable, "no zoot suit" technology. The new 7.3 is putting out the kind of power we were all fascinated by 25-30yrs ago by the first gen turbo diesels. AND from all reports it's also putting up some pretty impressive fuel economy numbers when empty and under 75mph. Low-mid teens were unheard of in bigblock gas HD motors back in the days of the 460 & 454/496.

Sign me up, I've been a GM disciple for a long time but my next truck will have a "zilla motah"!!!
Old 10-31-2020, 11:30 AM
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No question I would buy the Ford with the 7.3 - I've heard outstanding things about it. Simpler design as well.
Old 10-31-2020, 02:01 PM
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I've owned a Duramax for about 10 years, have had great luck with the truck, but it's time for something new. I've spent quite a bit of behind the wheel on the 2020 models. I would pick any Ford 10 speed option over the GM 6.6/6 speed. Power wise the 6.6 seems at least as strong as the 6.2, but the 6 speed/3.73 combo does it no favors. A 10 speed with something like the 4.30s that Ford offers would be great options for the GM. The 7.3/4.30 Fords are just in a different league. Being a new motor we can't speak for longevity, but I believe Ford did their homework. As far as I'm concerned the only thing GM has on Ford is the IFS ride. If you would have told me 5 years ago my next truck would have a blue oval on the grille, I would have called you crazy. Well, I guess it'll be black with the sport package
Old 11-01-2020, 06:47 PM
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With the 6 speed FM brought a knife to a gun fight.
Old 11-02-2020, 05:21 AM
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Originally Posted by ParkRanger View Post
I've owned a Duramax for about 10 years, have had great luck with the truck, but it's time for something new. I've spent quite a bit of behind the wheel on the 2020 models. I would pick any Ford 10 speed option over the GM 6.6/6 speed. Power wise the 6.6 seems at least as strong as the 6.2, but the 6 speed/3.73 combo does it no favors. A 10 speed with something like the 4.30s that Ford offers would be great options for the GM. The 7.3/4.30 Fords are just in a different league. Being a new motor we can't speak for longevity, but I believe Ford did their homework. As far as I'm concerned the only thing GM has on Ford is the IFS ride. If you would have told me 5 years ago my next truck would have a blue oval on the grille, I would have called you crazy. Well, I guess it'll be black with the sport package
I could have written these same words! The ten speed trannys are a game changer for gassers. After 35 years of GM I am in a “Black oval”! I think you want this;





Originally Posted by Bob1957 View Post
With the 6 speed GM brought a knife to a gun fight.
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