6.8 V8 engine
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Joined: May 2004
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From: Home Base Nebraska
A detuned motor may not last as long but time will tell. Back in the day I had a few service trucks that came with a 351M and because of the lack of power they didn't last as long as the 400 motors I built to replace them. A 351M was easy to convert to a 400 by replacing the crankshaft and pistons, it's limiting factor was the ability breath.
Denny
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Joined: May 2021
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It may last longer if you consider mileage but time in service may be shorter because of the fleet service and mileage per year.
A detuned motor may not last as long but time will tell. Back in the day I had a few service trucks that came with a 351M and because of the lack of power they didn't last as long as the 400 motors I built to replace them. A 351M was easy to convert to a 400 by replacing the crankshaft and pistons, it's limiting factor was the ability breath.
Denny
A detuned motor may not last as long but time will tell. Back in the day I had a few service trucks that came with a 351M and because of the lack of power they didn't last as long as the 400 motors I built to replace them. A 351M was easy to convert to a 400 by replacing the crankshaft and pistons, it's limiting factor was the ability breath.
Denny
then we have the issues rumored to have been due to the tune on 7.3 used on motor homes, RVs, cutaways, and outfitted trucks. Some say it’s a breaking in issue being used hard since day one, but I can’t see ford not taking that into account when designing a motor specifically designed to replace the 6.8 v10 used in motor homes and commercial applications.
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Logistics Pro
Joined: Jan 2005
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From: penn twp.
ford’s 2023 literature says the 6.8 has a higher compression rate than the 7.3. I’m not sure if/what retuning would be since with a smaller displacement the specific output of the two are quite close.
then we have the issues rumored to have been due to the tune on 7.3 used on motor homes, RVs, cutaways, and outfitted trucks. Some say it’s a breaking in issue being used hard since day one, but I can’t see ford not taking that into account when designing a motor specifically designed to replace the 6.8 v10 used in motor homes and commercial applications.
then we have the issues rumored to have been due to the tune on 7.3 used on motor homes, RVs, cutaways, and outfitted trucks. Some say it’s a breaking in issue being used hard since day one, but I can’t see ford not taking that into account when designing a motor specifically designed to replace the 6.8 v10 used in motor homes and commercial applications.
Mountain Pass
Joined: Oct 2012
Posts: 133
Likes: 157
From: SW Idaho
I wouldn’t be surprised if it’s the same lifter used by different manufacturers. No matter the make of vehicle, lots of part suppliers actually make the parts for the rigs we buy. Besides a few things, Ford, GM, Chrysler are designers/assemblers
Mountain Pass
Joined: Jan 2021
Posts: 208
Likes: 51
From: Wisconsin
Transmissions; The 10r140 for the 6.7 and 7.3 only difference I've seen published is 4 sun gears in the 6.7 version and 3 in the 7.3 ..
I wonder if the 10r100 is the same case with lighter shafts and gears ?? Which makes sense to Me with some shared parts to keep
cost down .. More units less cost per unit ??
I think Ford is getting ready for a future gas engine power/torque competition with the 7.3 .. Like the Diesel engines over the last
20+ years .. The spread between the 6.8 and 7.3 will increase year to year ..
I wonder if the 10r100 is the same case with lighter shafts and gears ?? Which makes sense to Me with some shared parts to keep
cost down .. More units less cost per unit ??
I think Ford is getting ready for a future gas engine power/torque competition with the 7.3 .. Like the Diesel engines over the last
20+ years .. The spread between the 6.8 and 7.3 will increase year to year ..
Trailering
Joined: Aug 2023
Posts: 24
Likes: 16
From: Thousand Oaks
This is why I didn't have a problem ordering an XL. Unfortunately, my transmission failed after eight days and 1,100 miles of ownership. It's been stuck at the dealership ever since, entering its seventh week now. I just joined the forum to see if any others are having the same experience. I'm really hoping I just got the one in a million bad one.
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Joined: May 2022
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From: Everywhere and nowhere
This is why I didn't have a problem ordering an XL. Unfortunately, my transmission failed after eight days and 1,100 miles of ownership. It's been stuck at the dealership ever since, entering its seventh week now. I just joined the forum to see if any others are having the same experience. I'm really hoping I just got the one in a million bad one.
Trailering
Joined: Aug 2023
Posts: 24
Likes: 16
From: Thousand Oaks
Yep, eight days in. It's still sitting at the dealership after seven weeks. It was a grand total of eight weeks and a day from the time I ordered to the delivery date, so after next week it will have taken more time to fix it than to have another one built. Needless to say I'm not too happy.
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Joined: May 2022
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From: Everywhere and nowhere
Yep, eight days in. It's still sitting at the dealership after seven weeks. It was a grand total of eight weeks and a day from the time I ordered to the delivery date, so after next week it will have taken more time to fix it than to have another one built. Needless to say I'm not too happy.
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Joined: Jul 2004
Posts: 21,113
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From: Ohio
I was looking at F250 XL plus package truck? Had the 6.8L engine but never considered what transmission it was......... guess I will have to look again. Chebby dealer had the same truck 2500 WT 6.6L gasser that came in at 50K but added $5,000 market adjustment making it 55k. Repo's are at a all-time market high right now. Probably keep driving my 03 and let this market flush itself out.
Never paying for dealer adjustments and add on garbage.
Never paying for dealer adjustments and add on garbage.
More Turbo
Joined: Feb 2011
Posts: 708
Likes: 188
I was looking at F250 XL plus package truck? Had the 6.8L engine but never considered what transmission it was......... guess I will have to look again. Chebby dealer had the same truck 2500 WT 6.6L gasser that came in at 50K but added $5,000 market adjustment making it 55k. Repo's are at a all-time market high right now. Probably keep driving my 03 and let this market flush itself out.
Never paying for dealer adjustments and add on garbage.
Never paying for dealer adjustments and add on garbage.
Trailering
Joined: Aug 2023
Posts: 24
Likes: 16
From: Thousand Oaks
I was looking at F250 XL plus package truck? Had the 6.8L engine but never considered what transmission it was......... guess I will have to look again. Chebby dealer had the same truck 2500 WT 6.6L gasser that came in at 50K but added $5,000 market adjustment making it 55k. Repo's are at a all-time market high right now. Probably keep driving my 03 and let this market flush itself out.
Never paying for dealer adjustments and add on garbage.
Never paying for dealer adjustments and add on garbage.
It's really too bad it failed so catastrophically. I love the truck I ordered but now I'm really questioning if I should have gone a different direction.
Fleet Mechanic
Joined: Dec 2021
Posts: 1,735
Likes: 1,116
Yeah I would have preferred the 7.3 just for the more robust transmission, but unfortunately you can't spec the XL Off Road package with the 7.3. Plus if you wanted the 7.3 in XL trim you had to spec the STX package, which made it more expensive than just getting an XLT. I don't really understand why the 6.8 exists at all when it's only available in the most basic of trucks, but nonetheless I assumed it would be a quality combination based on the level of abuse most basic trucks come to expect.
It's really too bad it failed so catastrophically. I love the truck I ordered but now I'm really questioning if I should have gone a different direction.
It's really too bad it failed so catastrophically. I love the truck I ordered but now I'm really questioning if I should have gone a different direction.
Banned
Joined: Jul 2023
Posts: 94
Likes: 26
Yeah I would have preferred the 7.3 just for the more robust transmission, but unfortunately you can't spec the XL Off Road package with the 7.3. Plus if you wanted the 7.3 in XL trim you had to spec the STX package, which made it more expensive than just getting an XLT. I don't really understand why the 6.8 exists at all when it's only available in the most basic of trucks, but nonetheless I assumed it would be a quality combination based on the level of abuse most basic trucks come to expect.
It's really too bad it failed so catastrophically. I love the truck I ordered but now I'm really questioning if I should have gone a different direction.
It's really too bad it failed so catastrophically. I love the truck I ordered but now I'm really questioning if I should have gone a different direction.
