Front Diff? Locked? Open?
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Tuned
Joined: Jan 2005
Posts: 266
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Front Diff? Locked? Open?
Maybe this is an entry level 4x4 question, but I need to ask... '04 4.6 f150 SCrew 4x4. Is the front differential Locked? Open? LSD? (When I forget to take it out of 4x4, it jumps on sharp turns.) (I have an 8.8" 3.73 open rear diff)
This is my first 4x4, although I worked for a farmer and got stuck may times with his f250 4x4. If I remember correctly, His truck jumped on sharp turns, but when stuck, 1 front wheel and 1 rear wheel spun.
I tried pulling pulling a bush out with this tree earlier this summer with my truck. I was on gravel in 4lo. Couldn't do it; tires just spun a tiny bit. Upon inspection of the gravel, I could see that both front wheels spun and 1 rear did also.
So what do I got? If I have an open fron diff what causes the jumping in tight turns? Is it the speed differential between front and rear axle?? Is there a difference between 4hi and 4lo?
Help me understand!!
TIA -jim
This is my first 4x4, although I worked for a farmer and got stuck may times with his f250 4x4. If I remember correctly, His truck jumped on sharp turns, but when stuck, 1 front wheel and 1 rear wheel spun.
I tried pulling pulling a bush out with this tree earlier this summer with my truck. I was on gravel in 4lo. Couldn't do it; tires just spun a tiny bit. Upon inspection of the gravel, I could see that both front wheels spun and 1 rear did also.
So what do I got? If I have an open fron diff what causes the jumping in tight turns? Is it the speed differential between front and rear axle?? Is there a difference between 4hi and 4lo?
Help me understand!!
TIA -jim
Posting Guru
Joined: Nov 2006
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No its open..... Trucks dont coem from the factory with a front locker lsd or any thing. Now some one previos to you could have added something but more than likely they would have told you are atleast did the rear end first instead of the front.
New User
Joined: Oct 2007
Posts: 2
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From: Oran, MO
Superduty is right, your truck didn't come from the factory equipped with LS in the front diff. The jumping when you are turning is because you have it in 4wd and more than likely on pavement. The reason your truck spun both front tires is unknown to me but I can tell you that most open rear ends with spin both tires in reverse given equal traction. I'm guessing since the front diff is essentially running backwards they both spun for the same reason.
Elder User
Joined: Dec 2006
Posts: 662
Likes: 2
From: CO
You're exactly right, that binding/jumping is the diiference in speed between the front and rear axles since the transfer case is solid. The drive train is screaming Ouch!! when that happens. Don't use 4wd on dry, solid surfaces.
Even with an open diff, if the traction conditions are just right under each tire, you will get both of them to spin. It doesn't happen very often, but it's not impossible either.
Even with an open diff, if the traction conditions are just right under each tire, you will get both of them to spin. It doesn't happen very often, but it's not impossible either.
