Limited slip or electronic locking???
Thread Starter
|
Cargo Master
Joined: Nov 2011
Posts: 2,946
Likes: 11
From: Northern California
So how do you know if you are getting open differentials on the front of the 4x4? Watching that first video...I would have thought that in 4 wheel drive being on that roller wouldn't have mattered. Seeing that first video the 4 wheel drive isn't doing anything so what's the point of putting an open differential on it??
Posting Guru
Joined: Sep 2011
Posts: 1,088
Likes: 1
So how do you know if you are getting open differentials on the front of the 4x4? Watching that first video...I would have thought that in 4 wheel drive being on that roller wouldn't have mattered. Seeing that first video the 4 wheel drive isn't doing anything so what's the point of putting an open differential on it??
Thread Starter
|
Cargo Master
Joined: Nov 2011
Posts: 2,946
Likes: 11
From: Northern California
I guess it just goes against everything I think a 4 wheel drive was...I look at it as all 4 wheels pulling regardless. Sad to see that is not the case.
Posting Guru
Joined: Sep 2011
Posts: 1,088
Likes: 1
- open diffs: 2 wheels will drive worst case
- locking rear: 3 wheels will drive worst case
In a truck with 2WD and open diff, you'll have only one wheel driving in the worst case.
A 2WD truck with a locker is similar to a 4WD with open diffs in that two wheels will be trying to push forward in the worst case, just with the 2WD locker, it's two wheels on one axle, with the 4WD open diff it's two wheels on different axles. Depending on the terrain or specific circumstances, one could be better than the other, even the 2WD with locker *could* be better off than the 4WD with open diffs.
The ideal case would be a LS diff in the rear with a locking option, and then a locker in the front. On top of that, I'd have 2LO on my wishlist. Now everything would be covered.
Thread Starter
|
Cargo Master
Joined: Nov 2011
Posts: 2,946
Likes: 11
From: Northern California
In a truck with 4WD and:
- open diffs: 2 wheels will drive worst case
- locking rear: 3 wheels will drive worst case
In a truck with 2WD and open diff, you'll have only one wheel driving in the worst case.
A 2WD truck with a locker is similar to a 4WD with open diffs in that two wheels will be trying to push forward in the worst case, just with the 2WD locker, it's two wheels on one axle, with the 4WD open diff it's two wheels on different axles. Depending on the terrain or specific circumstances, one could be better than the other, even the 2WD with locker *could* be better off than the 4WD with open diffs.
The ideal case would be a LS diff in the rear with a locking option, and then a locker in the front. On top of that, I'd have 2LO on my wishlist. Now everything would be covered.
- open diffs: 2 wheels will drive worst case
- locking rear: 3 wheels will drive worst case
In a truck with 2WD and open diff, you'll have only one wheel driving in the worst case.
A 2WD truck with a locker is similar to a 4WD with open diffs in that two wheels will be trying to push forward in the worst case, just with the 2WD locker, it's two wheels on one axle, with the 4WD open diff it's two wheels on different axles. Depending on the terrain or specific circumstances, one could be better than the other, even the 2WD with locker *could* be better off than the 4WD with open diffs.
The ideal case would be a LS diff in the rear with a locking option, and then a locker in the front. On top of that, I'd have 2LO on my wishlist. Now everything would be covered.
Super Moderator
Joined: Jan 2008
Posts: 40,024
Likes: 1,519
From: Maine, Virginia
I will say that vids prove GM's point. But, I've owned 4x4 trucks since 1986 and my dad before me since 1976.
Together we've both owned open and LS diffs and never really had any issues that GM is saying that you will experience without and Eaton ale.
My '86 F-150 4x4 had 3.08 open diffs and my '88 4x4 had 3.73's, LS rear. My 2011 has 3.31 open diffs, no elocker.
Each of my three trucks felt great off road. My '11 feels a bit more sure footed mainly due to it's power and weight.
Good driving and great tires can alleviate most situations. Though I think GM is on the right track with the Eaton, I look at it as a marketing gimmick more than anything. Much like the Allison Transmission if you will.
Clearly Ford has seen a benefit to an open diff that can be locked on demand. Likewise Ford sees a benefit to an LSD for the HD trucks.
Together we've both owned open and LS diffs and never really had any issues that GM is saying that you will experience without and Eaton ale.
My '86 F-150 4x4 had 3.08 open diffs and my '88 4x4 had 3.73's, LS rear. My 2011 has 3.31 open diffs, no elocker.
Each of my three trucks felt great off road. My '11 feels a bit more sure footed mainly due to it's power and weight.
Good driving and great tires can alleviate most situations. Though I think GM is on the right track with the Eaton, I look at it as a marketing gimmick more than anything. Much like the Allison Transmission if you will.
Clearly Ford has seen a benefit to an open diff that can be locked on demand. Likewise Ford sees a benefit to an LSD for the HD trucks.
Thread Starter
|
Cargo Master
Joined: Nov 2011
Posts: 2,946
Likes: 11
From: Northern California
Hmm...
Did you get my PM?
Did you get my PM?
I will say that vids prove GM's point. But, I've owned 4x4 trucks since 1986 and my dad before me since 1976.
Together we've both owned open and LS diffs and never really had any issues that GM is saying that you will experience without and Eaton ale.
My '86 F-150 4x4 had 3.08 open diffs and my '88 4x4 had 3.73's, LS rear. My 2011 has 3.31 open diffs, no elocker.
Each of my three trucks felt great off road. My '11 feels a bit more sure footed mainly due to it's power and weight.
Good driving and great tires can alleviate most situations. Though I think GM is on the right track with the Eaton, I look at it as a marketing gimmick more than anything. Much like the Allison Transmission if you will.
Clearly Ford has seen a benefit to an open diff that can be locked on demand. Likewise Ford sees a benefit to an LSD for the HD trucks.
Together we've both owned open and LS diffs and never really had any issues that GM is saying that you will experience without and Eaton ale.
My '86 F-150 4x4 had 3.08 open diffs and my '88 4x4 had 3.73's, LS rear. My 2011 has 3.31 open diffs, no elocker.
Each of my three trucks felt great off road. My '11 feels a bit more sure footed mainly due to it's power and weight.
Good driving and great tires can alleviate most situations. Though I think GM is on the right track with the Eaton, I look at it as a marketing gimmick more than anything. Much like the Allison Transmission if you will.
Clearly Ford has seen a benefit to an open diff that can be locked on demand. Likewise Ford sees a benefit to an LSD for the HD trucks.
Fleet Mechanic
Joined: Nov 2003
Posts: 1,311
Likes: 7
Those are some great videos! Especially the first one simulating a launch ramp. IS this the type of EL on the F150? I thought when you engage the EL by pulling out the **** it is locked immediately not when it senses slipping? BTW that rear tire on the last video looked like it was going to break off! Just by watching these videos I think the EL is the way to go. Thanks! Reps sent. 
I don't beleive GM trucks have a selectable option as theirs is automatic.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
Thread Starter
|
Cargo Master
Joined: Nov 2011
Posts: 2,946
Likes: 11
From: Northern California
No its not the same...I mean essentially they do the same job, however GM's G80 rear locker is activated only by wheel slip as the videos indicate. I beleive Ford uses a Detroit selectable in their trucks, which means that in only functions when the **** in the dashboard is pulled out.
I don't beleive GM trucks have a selectable option as theirs is automatic.
I don't beleive GM trucks have a selectable option as theirs is automatic.
Moderator
Joined: Jul 2011
Posts: 6,509
Likes: 658
From: Sioux Falls Area
the 3.7 trucks get the venerable 8.8" ford rear, for which LS is availble
the 5.0's get the bigger rear, and they don't offer the LS outside of the max tow, which you cannot get on the STX
Moderator
Joined: Jul 2011
Posts: 6,509
Likes: 658
From: Sioux Falls Area
yep .... my bad .... sorry 
HD payload comes with LS 3.73's
max tow comes with open or Elock 3.73's
neither of which are available on the STX.
i dont remember who said it here, but i agree that ford is making some unpopular decisions with regard to the differential options they are providing their customers.
HD payload comes with LS 3.73's
max tow comes with open or Elock 3.73's
neither of which are available on the STX.
i dont remember who said it here, but i agree that ford is making some unpopular decisions with regard to the differential options they are providing their customers.
Elder User
Joined: Feb 2004
Posts: 754
Likes: 0
From: Cedar Springs,MI
So which rearend would be a better fit for my wife, LS or Elock? I will be ordering a 2012/13 Max Tow, Crew Cab, Lariat, 3.73 for her as a daily driver? She is 80% highway, 80 mile round trip daily. Michigan winters
More Turbo
Joined: Dec 2011
Posts: 739
Likes: 393
Unless something changes for the 2013's, you don't have a choice. They only offer the ELock in that configuration. If you add the HD Payload package then you have to get the LS.