Locking diff...who can explain this??
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Senior User
Joined: Dec 2012
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Locking diff...who can explain this??
ok I am lost on this one....when the diff is locked...... its locked I do not understand what is happening here.....who can explain why the diff is not locking on the Ford?
Posting Guru
Joined: Sep 2009
Posts: 2,015
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From: Lakehills, TX
I'm not sure what's up with the ramp in the first place. Rollers on one side, I assume?
Either way, clearly if the truck is equipped with an E-locker it's not engaged. In mine it's very clearly felt on high-traction surfaces (asphalt) and walks up loose dirt and small-rock-strewn hills steeper than that ramp. And there's no drama you get from an LSD-like locker. It's just on before I start. I'd love to run that ramp in my truck and figure out WTF they're trying to pull with that. Fishy.
Either way, clearly if the truck is equipped with an E-locker it's not engaged. In mine it's very clearly felt on high-traction surfaces (asphalt) and walks up loose dirt and small-rock-strewn hills steeper than that ramp. And there's no drama you get from an LSD-like locker. It's just on before I start. I'd love to run that ramp in my truck and figure out WTF they're trying to pull with that. Fishy.
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yeah its got rollers on the driver side and regular steel grate on the pass side.....they are testing the diffs in all 3 trucks. You can hear the guy say that in order to lock the diff in the Ford you pull out the 4x4 switch.
Now did they do that or did they leave it in.....I know the chevrolet locks the diff by somewhere around 7mph difference in each wheel. I have locked the diff in my truck just to play and it is a true locker as I understand it to be so I am lost as to why their truck could not make it up the ramp.
Also why did they have it in 4 wheel drive and left the chevy in 2wd??? I wonder did they switch it to 4wd but not pull the switch out to lock the diff? Obviously that is not gonna work....if they expected it to lock like the chevrolet based on slip then no it will never lock and the results are what we see.
Is there a Ford engineer here to explain this? When pulling the ELD switch out it is a true locker correct?
Now did they do that or did they leave it in.....I know the chevrolet locks the diff by somewhere around 7mph difference in each wheel. I have locked the diff in my truck just to play and it is a true locker as I understand it to be so I am lost as to why their truck could not make it up the ramp.
Also why did they have it in 4 wheel drive and left the chevy in 2wd??? I wonder did they switch it to 4wd but not pull the switch out to lock the diff? Obviously that is not gonna work....if they expected it to lock like the chevrolet based on slip then no it will never lock and the results are what we see.
Is there a Ford engineer here to explain this? When pulling the ELD switch out it is a true locker correct?
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so whats your opinion on this? do you think they left the ELD unengaged? The ELD is standard on the 4x4 super duty correct?
This just does not make sense.....if the rear does not lock then whats the use of having it?
I personally think they left the ELD switched off or the truck was not equipped with it (I doubt it I am sure it is standard on a 4x4)
This just does not make sense.....if the rear does not lock then whats the use of having it?
I personally think they left the ELD switched off or the truck was not equipped with it (I doubt it I am sure it is standard on a 4x4)
Fleet Mechanic
Joined: Jul 2005
Posts: 1,800
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From: Southern Colorado
From my GM buddies, I have learned that Gov-locks tend to blow up in their later years, which isn't a vote in their favor. It's not a horrible design, but like all lockers, it's not perfect either. I think it requires a 100 rpm difference in wheel speed between the slipping and the non-slipping side to engage, which is why you hear the clunk.
Super Moderator
Joined: Aug 2003
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From: Isanti, MN
Myth BUSTED!
This video is deceptive and misleading at best.
To start off they can't even spell Cummins, see below.
How can this source be considered credible if they can't even properly spell one of the most well known engine manufacturer's names?
Secondly did you guys notice that the truck was a DRW truck? The electronic locking differential is not available on a DRW truck. That's most likely because the DRW truck uses a Dana rear axle which is completely different from the Ford designed and manufactured axle for the SRW trucks. The two axles share nothing in common, so it makes sense why the ELD wouldn't be available.
Proof that it wasn't available from the factory is below, taken straight from the 2011 Super Duty order guide. And proof that it didn't have an aftermarket locker installed can be seen in the video.
To start off they can't even spell Cummins, see below.
How can this source be considered credible if they can't even properly spell one of the most well known engine manufacturer's names? Secondly did you guys notice that the truck was a DRW truck? The electronic locking differential is not available on a DRW truck. That's most likely because the DRW truck uses a Dana rear axle which is completely different from the Ford designed and manufactured axle for the SRW trucks. The two axles share nothing in common, so it makes sense why the ELD wouldn't be available.
Proof that it wasn't available from the factory is below, taken straight from the 2011 Super Duty order guide. And proof that it didn't have an aftermarket locker installed can be seen in the video.
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Senior User
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ok thats it....Thanks Crazy001!!!!!
I thought this video was BS when I saw it but I could not understand why the diff was not locking. Ok so the DRW is not equipped with ELD....mystery solved.
I am a GM fan I have had 4 GM/Chevy trucks one used to be an '04 Dmax.....I like GM Still but I chose the Ford for many reasons you guys aleady know.
I hate to see videos like this trying to show which truck is superior and then not compare equally.
Bogus video and very lame on the people who put this video together!
I thought this video was BS when I saw it but I could not understand why the diff was not locking. Ok so the DRW is not equipped with ELD....mystery solved.
I am a GM fan I have had 4 GM/Chevy trucks one used to be an '04 Dmax.....I like GM Still but I chose the Ford for many reasons you guys aleady know.
I hate to see videos like this trying to show which truck is superior and then not compare equally.
Bogus video and very lame on the people who put this video together!
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Super Moderator
Joined: Aug 2003
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From: Isanti, MN
I have absolutely no use for blind brand loyalty, but well done objective tests can be great tools for comparison. But blatantly misleading everyone like that makes it far from objective, although the misspelling of Cummins lends credibility to the idea of simple incompetence rather than intentional deception.
Post Fiend
Joined: Mar 2009
Posts: 11,798
Likes: 14
From: Mt. Shasta California
There are a lot of different locking differentials now days and years ago it was just the posi-traction and the limited slip. That demonstration was as deceptive as the ads you see about vacuum cleaners. If all those trucks started 5 feet back (on the pavement) at full throttle they would have all gone up the ramp locked. They just have different characteristics and they capitalized on it with the phony ramp demo. "If you order now we will send a second one free, but wait!"............lol.
Fleet Owner
Joined: Apr 2012
Posts: 27,307
Likes: 549
From: Spanaway
A vacuum cleaner salesman was the first thing that came to mind when I
watched that video. If you stack the deck even Joseph Stalin
can look better.
That is one reasons I don't trust advertising and political polls.
Sean
watched that video. If you stack the deck even Joseph Stalin
can look better.
That is one reasons I don't trust advertising and political polls.
Sean
9 ECHO 1
Joined: Aug 2009
Posts: 12,467
Likes: 58
From: Missouri
+1.
I have absolutely no use for blind brand loyalty, but well done objective tests can be great tools for comparison. But blatantly misleading everyone like that makes it far from objective, although the misspelling of Cummins lends credibility to the idea of simple incompetence rather than intentional deception.
I have absolutely no use for blind brand loyalty, but well done objective tests can be great tools for comparison. But blatantly misleading everyone like that makes it far from objective, although the misspelling of Cummins lends credibility to the idea of simple incompetence rather than intentional deception.
You can hear the guy say it has a locking diff, but as we know, it did not. Also, leaving the Chevy in 2wd? That wouldnt have made a difference anyway. Just trying to make the Chevy seem all that much better lol
Post Fiend
Joined: Mar 2009
Posts: 11,798
Likes: 14
From: Mt. Shasta California
I have never bought anything I saw on TV so they could have skipped all those ads since 1955 and it wouldn't have made a difference. Political polls; people just vote for whatever they think will help them or whatever might help their kind.........if you know what I mean.
Cargo Master
Joined: Jun 2011
Posts: 2,272
Likes: 208
From: Cincy area
That video was entertaining. Even if it wasn't a scam I wouldn't buy any other truck. Those trucks are plain fugly. I noticed they left out the crappy front suspension. No comparison's there, huh chevy guy.
Post Fiend
Joined: Mar 2009
Posts: 11,798
Likes: 14
From: Mt. Shasta California
Rest assured, it was a scam. I have seen this same kind of scam before. Some diffs are just a little more sensitive at first than others.