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Old 09-06-2014, 03:11 PM   #21
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"By changing the way it measures the 2015 F-450′s payload and towing ratings, Ford has thrown the latest punch in an ongoing debate with Ram over which brand of heavy-duty pickup has best-in-class towing.
Ford announced today that the newest F-450′s maximum towing rating now adheres to the SAE J2807 towing standard. Ford also announced that it would use base curb weights to determine the truck’s payload ratings moving forward. In the past, Ford has used its own methods for determining both of these ratings.
The automaker was the first to determine maximum payload rating in pickups using minimum curb weight, stripping certain equipment out of its pickups in order to lower their weight and boost ratings, as Automotive News points out.
When it comes to towing ratings, Ram recently adopted the J2807 towing standard across all of its 2015 trucks and GM has announced J2807-compliant ratings for the 2015 Chevrolet Silverado and GMC Sierra 1500s. Ford announced in February that the 2015 F-150 would be rated according to the standard. Unlike the F-450, Ford’s other Super Duty pickups, the F-250 and F-350, won’t follow the standard until they receive a redesign. However, a Ford spokesperson did tell Automotive News that their “maximum payloads would be restated using base curb weights.”
Using the J2807 standard, the crew-cab 4×4 F-450 was actually able to retain the maximum towing rating of 31,200 pounds that Ford previously touted from internal testing. That figure is 2,200 pounds more than the truck’s closest competitor, the Ram 3500 4×4, and Ford is claiming a best-in-class rating.
However, Ram previously argued that Ford can’t make that claim because technically, the F-450 is a Class 4 pickup, unlike the Class 3 Ram 3500. Despite the fact that the F-450 actually uses an F-350 frame, Class 3 pickups must have a gross vehicle weight rating (GVWR) of 14,000 pounds and lower. GVWR is the max amount the vehicle can weigh and the F-450′s was higher than 14,000 pounds.
In response, and as part of the migration to the J2807 standard, Ford now uses base curb weights to determine max payload which not only lowered the F-450′s max payload 150 pounds to 5,300, but also put the truck’s GVWR under 14,000 pounds.
So, in the end, migrating to the stricter standards were a win-win for Ford. Not only does it put the F-450 in line with other manufacturers using the J2807 standard—thus making it easier for customer comparisons between brands—it also allows the truck to claim best-in-class towing title among Class 3 trucks.
Moving to the J2807 standard also upped the F-450′s undisputed claim to best-in-class gross combined weight rating (GCWR) from 40,000 pounds to 40,400 pounds. GCWR measures the maximum amount of weight a truck can haul combining the weight of the vehicle and the trailer.
“We leave no doubt with customers that the F-450 pickup truck has best-in-class towing of 31,200 pounds—whether tested using our own internal towing standards or SAE J2807,” Raj Nair, Ford’s vice president for global product development, said in a prepared statement."

I'm sorry fellas. I tried. Believe me, I tried. Just couldn't take it no mo'.
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Old 09-06-2014, 04:34 PM   #22
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I've said it before and I'll say it again........all 3 of the trucks built today are great trucks. Never before would I have said that because 1 or 2 of the manufactures had issues. This is the first time all three have great transmissions. I'm sure GM is already planing on getting back in the fight (as soon as they get done with all their recalls).

Because of all the stiff competition we as owners win.
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Old 09-06-2014, 05:29 PM   #23
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Vaughan,

You already know my experience with letting a mechanic pull it apart that didn't know what he was doing!

I questioned whether I wanted the limited slip on this new one or not. I've had to live with some noises on various brands equipped with limited slip or posi-traction over the years. Maybe that is what is giving you the noise.
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Old 09-06-2014, 10:10 PM   #24
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Brad ~ pretty much all of us involved at Ford, the tech and myself are sure it's the Limited Slip making the noise. It hasn't gotten worse, comes and goes, and only on a full lock turn at parking speeds, usually when hot like after a long run with the RW behind it.

Going to try the Motorcraft Friction Modifier and see what happens. tearing into it is my last resort. If the Ford stuff works as well as the GM Limited Slip additive, I really doubt I'll have to have it pulled apart.
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Old 09-07-2014, 03:40 AM   #25
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Vaughan, You might also consider a Magtec cover for the rear end when you change the fluid- holds more gear lube, helps rear end run a little cooler.
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Old 09-07-2014, 10:37 PM   #26
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Might be the same rear end, I just know that after pulling with the Ford for almost 4 years and now pulling with the Ram there is no comparison. I would never have thought there was that much difference in brands of trucks.
Atom feels the same way when comparing his 2010 Ford to his 2014 Ford. The latest generation of trucks are night and day better than just a few years ago,
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Old 09-07-2014, 11:15 PM   #27
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As long as the stiff competition continues......the trucks will improve greatly each year.
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Old 09-08-2014, 01:27 PM   #28
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Agree with lwg...

the comparison across years shows more of a difference than across brands nowdays


Heck, compare how fast YOU used to be able to run to today
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Old 09-09-2014, 12:40 AM   #29
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hahaha - We've come a long ways from the 4.10s behind my 3 sp auto and that 4 bbl 460 that struggled to not overheat at 60 mph pulling a travel trailer
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Old 09-29-2014, 12:38 PM   #30
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Update - put the Friction Modifier in the axle and now have about 2000 miles with it in .
Noise totally gone. If you have a truck with the Limited Slip rear axle you might want to consider adding a bottle. Each manufacturer has their own, GM, FORD AND RAM. The stuff works.

Ford calls it a friction Modifier, GM calls it Limited Slip Additive. Not sure what Ram calls it. Regardless - it works.

It's a 4oz bottle, usually about $7-9.00 and smells really really nasty .....
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Old 09-29-2014, 02:19 PM   #31
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We now always had to use the Limit Slip Additive on our GM trucks, we had a popping noise in the rear axle when turning many years ago on a previous GM truck, changed the axle oil and added the additive, no problems since.
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Old 09-29-2014, 02:22 PM   #32
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Thanks Vaughan!

PS - that shudder I had pulling away from a stop towing under load has nearly disappeared with a few miles - just like you said.
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Old 09-29-2014, 02:34 PM   #33
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Update - put the Friction Modifier in the axle and now have about 2000 miles with it in .
Noise totally gone. If you have a truck with the Limited Slip rear axle you might want to consider adding a bottle. Each manufacturer has their own, GM, FORD AND RAM. The stuff works.

Ford calls it a friction Modifier, GM calls it Limited Slip Additive. Not sure what Ram calls it. Regardless - it works.

It's a 4oz bottle, usually about $7-9.00 and smells really really nasty .....

I'm glad you got that little problem figured out
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Old 09-29-2014, 02:35 PM   #34
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So am I ........... REALLY didn't want to have someone tear into the axle.
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