How common is this axle?
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Postmaster
Joined: Aug 2004
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From: West Mansfield, Ohio
How common is this axle?
So I decided to decode my axle. It's an H9, which according to the reference material on this site, indicated that its a 3.55 L/S. Is that true? This truck has the off road and towing packages, and I've NEVER spun only one rear tire. If I decide to spin the tires a little on dry pavement, both of those babies are rollin. So is the information I've gathered correct?
Post Fiend
Joined: Nov 2001
Posts: 14,947
Likes: 6
From: Topsfield, MA
Most likely...they're fairly common...
Jack up both rear wheels and turn one - if the other wheel turns the same direction it's confirmed.
An LS will behave differently while driving than an open diff...
Read posts 14 + 17 of this thread for info...
https://www.ford-trucks.com/forums/s...d.php?t=440090
Jack up both rear wheels and turn one - if the other wheel turns the same direction it's confirmed.
An LS will behave differently while driving than an open diff...
Read posts 14 + 17 of this thread for info...
https://www.ford-trucks.com/forums/s...d.php?t=440090
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Postmaster
Joined: Aug 2004
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From: West Mansfield, Ohio
Thanks a lot for that. If I recall right both tires spun the same direction in the air. And regaurding that link..... I have all the symptoms of a L/S that you described. That thing will not turn at all, and it wears the rear tires in a hurry. It also handles much differently than any other truck I've driven in snow and ice.
Let me make this statement. I do know that if I am sitting on a snowy or somewhat icy driveway or road, if I dont keep the brakes held down, both rear tires will spin at idle. There has been one occassion where this was happening, and one was spinning, and the other was kind of half *** spinning. The right rear was spinning and the left rear was also spinning, but it seemed like it was havin a harder time turnin.
So how does this affect my 4wd. I know that on other trucks, if one tire on the back is spinning, only one on the front is also. Would I have complete 4wd since both back tires spin?
Let me make this statement. I do know that if I am sitting on a snowy or somewhat icy driveway or road, if I dont keep the brakes held down, both rear tires will spin at idle. There has been one occassion where this was happening, and one was spinning, and the other was kind of half *** spinning. The right rear was spinning and the left rear was also spinning, but it seemed like it was havin a harder time turnin.
So how does this affect my 4wd. I know that on other trucks, if one tire on the back is spinning, only one on the front is also. Would I have complete 4wd since both back tires spin?
Post Fiend
Joined: Nov 2001
Posts: 14,947
Likes: 6
From: Topsfield, MA
Most trucks that are 4wd - are realistically only 2wd if both of their axles have open diffs (which most do). Trucks with a limited slip in the back will spin both rear tires unless there is a large enough torque bias between the wheels - such as when 1 of those tires is off the ground. The limited slip has it's limits as to how much torque it can split.
The front and rear axles are separate drivetrains - the rear doesn't affect the front. If you have a limited slip in the back and open diff in the front - than you have more of a 3wd. You'll spin 1 front tire unless the traction and power transfer is identical between the two fronts (which usually never happens).
The front and rear axles are separate drivetrains - the rear doesn't affect the front. If you have a limited slip in the back and open diff in the front - than you have more of a 3wd. You'll spin 1 front tire unless the traction and power transfer is identical between the two fronts (which usually never happens).
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Postmaster
Joined: Aug 2004
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From: West Mansfield, Ohio
I figured thats what it would end up being. Although a few occassions when I have been playing in the mud, all 4's are spinning crazy. There has been a few occassions where its kind of been a 3 1/2 wheel drive.... where both rears are spinning, one front is spinning, and the other front is spinning half as fast as the other front...... and making a clicking noise. It reminds me of a Honda 4x4 4 wheeler.
Post Fiend
Joined: Nov 2001
Posts: 14,947
Likes: 6
From: Topsfield, MA
Yup, that'll happen. It's the nature of an open diff. Power is put to the side with the least traction - which changes every second...it's also not just traction - any resistance to turning. For example, the passanger side has more axleshaft to turn so power may be bias to the drivers side. It's just whatever side the differential can turn more easily.
