JP2085

Imagine how disappointed you'd be if you bought a 4x4 w/ open diffs like I did. I've gotten stuck twice now, granted mostly due to the tires I had at the time. I think I'm going to do a Detroit Truetrac when I can afford it.

f150cwcw

So im guessing this means you have 4x4 but not all four tires turn at once?

VanoFord

its like your rear axle, just twice.

f150cwcw

im going to have to shop around and see what i can find. I dont mind spending 300-400 dollars for something like this as much as i have problems with slipping.

Scany

I don't know the specifics of the F150, but I do work on my BMW track car and putting an LSD in is as easy as changing your diff. Fairly straight forward. I don't see why it shouldn't be as easy in the truck.

As for 1WD (non-LSD), 2WD, and 4WD I chose 2WD because of maintenance and need. More drivetrain stuff means more stuff to maintain and that can break. Plus it adds weight to the truck. With an LSD and some ballast in the bed I have gotten around most places. But it's not a 4WD by any means, but I also don't need it and doubt that 80% or more with 4WD does.

A thing to consider with an LSD is that you might get two wheels going, but also two wheels sliding, meaning your rear end will start sliding sideways if it doesn't go all forward. You can control it, but you can't just hit the throttle or you'll spin it around. I almost slid down a hill on a muddy road coming around a turn once. But some careful driving is all it took to keep moving forward. Also, make sure you have good/correct tires and correct air pressures for the driving you are doing. A good excuse to get an extra set of rims and tires

If you want pictures of an LSD I can crawl under and take some and you can visually compare to yours. But you might want to call a qualified Ford mechanic to see if the diffs are interchangeable. I'd be very surprised if not since it is an option and I doubt the axles are different.

2WD FTW and good luck!

ray h

To the OP: To install a LSD in your diff you will need to reset the ring gear backlash and pattern. If you get a factory LS, I think you will be disappointed. It wont make that much difference.
To Van: I hope you didnt buy that Auburn thinking it is a "locker". Its not a locker, its an aggressive limited slip, but not a locker.

RahX

Or go to a local pick-n-pull and find a wrecked truck with a good rearend and just swap the whole thing.

f150cwcw

Thats kinda what i was thinking about doing. It would be so easy to just switch out the whole axle.

f150cwcw

the Auburn limited slip Van is talking about is specifically designed for road racing.

f150cwcw

When going to look for a "pick and pull" axle, doesnt the sticker inside of the front door have a code to tell whether the axle that is on the truck is limited slip or not?