thinking about installing a 3.73 LS
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From: Mooresville indiana
thinking about installing a 3.73 LS
I have a 2003 Screw 4x4 5.4 with a 3:73 open diff and it is very irritating in snow even with tires that probably have less then 15,000 miles on them. How hard would it be to swap the axle out for a Limited slip? or just replacing the gears in the stock assembly
Last edited by Fordfan2006; Mar 9, 2015 at 11:59 AM.
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From: Indianapolis, IN
I don't see why it wouldn't be a direct swap. The only difference is what's inside the pumpkin. I have the same dilemma - my old truck with a LS was way more capable in normal driving.
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From: Mooresville indiana
i bet haha. i've been stuck so many times in the past few months yesterday i got into a driveway covered in snow 3 ft in stuck 4 hi 2nd gear stuck 4 lo got it out.
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I would highly recommend a detroit truetrac limited slip. I have one in my 2wd 4.6L and with 300lbs of sand in the bed and it makes a tremendous difference.
Just make sure to use conventional gear oil in the diff or you're cheating yourself on its capabilities. As for it being a direct swap: It was in my truck but mine also had a factory Limited slip. I think I remember reading non-LSD rearends need something added for it to work but not 100%
Just make sure to use conventional gear oil in the diff or you're cheating yourself on its capabilities. As for it being a direct swap: It was in my truck but mine also had a factory Limited slip. I think I remember reading non-LSD rearends need something added for it to work but not 100%
Last edited by me1234; Mar 9, 2015 at 12:40 PM.
Thread Starter
Senior Member
Joined: Jul 2013
Posts: 3,266
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From: Mooresville indiana
I would highly recommend a detroit truetrac limited slip. I have one in my 2wd 4.6L and with 300lbs of sand in the bed and it makes a tremendous difference. Just make sure to use conventional gear oil in the diff or you're cheating yourself on its capabilities. As for it being a direct swap: It was in my truck but mine also had a factory Limited slip. I think I remember reading non-LSD rearends need something added for it to work but not 100%