Is there any reason to get a limited slip rear axle in a 4x4? I have one on my 94 which is a 4x2. But if you get in bad weather you would run 4 wheel drive so what is the limited slip for?
Roger
for those times when you really need it. ex... one wheel in a mud hole, one on dry land. or going through a crossing sideways where it picks a rear tire off the ground.
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My silverado 4x4 doesn't have a LSD on the back, but i wish it did! I could turn corners at the lights faster without having one wheel spin, the examples XLTRunner gave, it gives a sportier drive, you don't need to engage 4x4 nearly as often, and lastly, you can't really do cookies without an LSD! Get an LSD!!!
Plus if you really think about it with out limited slip you really only have a 3 wheel drive truck, because only 1 of the rear wheels has traction. Go for the limited slip if you can.
Agreed on all of the above posts 100%. When buying new, the LS option only costs $300.00 unless it comes as part of a towing package. You'll never be sorry you got it.
Tim
__________________ SCPO United States Coast Guard Retired '04 Expedition XLT 4x2 '99 Taurus Wagon SE 24V '88 F-150 4x4 XLT Lariat 5.8L 5Spd
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A limited slip rear is better than an open diff but not by much. If one wheel is on blacktop and the other is on grass the wheel on grass will still peg leg with the LS. Aftermarket units like the truetrac are much better than the stock LS. You get an open diff up front regardless.
A limited slip rear is better than an open diff but not by much. If one wheel is on blacktop and the other is on grass the wheel on grass will still peg leg with the LS. Aftermarket units like the truetrac are much better than the stock LS. You get an open diff up front regardless.
All true, but the factory LS is cheaper than any aftermarket model that I'm aware of, especially once you factor in installation. Not to mention, an aftermarket one would likely void any warranty claims on the axles or ring & pinion. Plus, a little bit of brake pressure can help keep the LS locked up in situations like you are describing.
I don't see any reason to buy a new truck without an LS (unless it has an E-Locker). I know a dealer that won't order a truck without one unless a customer special orders it.
A limited slip rear is better than an open diff but not by much. If one wheel is on blacktop and the other is on grass the wheel on grass will still peg leg with the LS.
FYI... That's easilly fixed by restacking the clutch packs and shimming for the desired preload. The factory LS will then deliver near locker performance.
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Paul O
1990 F150 4x4 XLT X-Cab 5.0, 3.55, Comp 35-349-8, Flowtech LT's to 3" single, FRPP Mass Air Conversion
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A limited slip rear is better than an open diff but not by much. If one wheel is on blacktop and the other is on grass the wheel on grass will still peg leg with the LS. Aftermarket units like the truetrac are much better than the stock LS. You get an open diff up front regardless.
...Yes the true trac , its worth the money , No more screwing around with the clutchs... I highly recomend them .. Lew
I found a '09 SuperCrew with all the options I want except for it doesn't have the LS rear. I am debating whether to get this one or just order one.
Thanks for y'alls comments.
Roger
I found a '09 SuperCrew with all the options I want except for it doesn't have the LS rear. I am debating whether to get this one or just order one.
Thanks for y'alls comments.
Roger
Depends what kind of deal you can get on it vs ordering a truck. If the truck has ESOF and don't do much low traction driving you may not really need it. A truetrac or similar aftermarket diff with install would run around $800 or so with parts and labor.
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FYI... That's easilly fixed by restacking the clutch packs and shimming for the desired preload. The factory LS will then deliver near locker performance.
I'm well aware of that. I'm talking in stock form here and IMO the stock LS doesn't cut the mustard. I was surprised how well the LS on my dads 93' F-150 worked and it seemed to me like it had a higher preload. He off course needed new clutchpacks by 50k miles also. Seems to me the later model trucks run less preload to try to get more life out of the clutches.
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All true, but the factory LS is cheaper than any aftermarket model that I'm aware of, especially once you factor in installation. Not to mention, an aftermarket one would likely void any warranty claims on the axles or ring & pinion. Plus, a little bit of brake pressure can help keep the LS locked up in situations like you are describing.
I don't see any reason to buy a new truck without an LS (unless it has an E-Locker). I know a dealer that won't order a truck without one unless a customer special orders it.
I agree for $300 its a so so deal for the LS over the open diff. Its better than an open diff but it could use improvement. Better yet just offer the locking diff in other trim levels besides the FX4. Also if you have the aftermarket diff installed by the dealer your warrenty should still be intact except for the aftermarket parts.
Apply the brake isn't feasable in a lot of situations, only when your stuck or close to it. Applying the brake while trying to climb up a slippery snowy mountain road with a high crown is not a natural thing. Lose traction and momentum and you can be SOL. My trucks arn't just for pavement use so a good diff is important to me.
With rebates and all I am getting about 21% off the WS.
About the only time I will use the 4x4 is in bad weather, i.e. snow, ice, etc.
If I order my truck I may upgrade the rear axle ratio to 3.73 LS instead of the 3.55. I have always had the 3.55 LS in my trucks; '85 SC & '94 SC and never had any problems.
Roger
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