i have a 2002 4.6 with 3.55 non limited slip, and pulling a trailer as much as i do i really need limited slip, so im thinking about getting one from the salvage yard,

i know the 9.75 is for the 5.4 and the 8.8 is the 4.6 so my question is would a 9.75 work better than a 8.8 or should i just go with the 8.8 again? and what size should i get as far as 3.55, 3.73 and so on.

AND...is there a way i can check to see if its limited slip or non limited slip, because the guy that runs the salvage yard here is a moron and probably doesnt keep up with it

 

If you are towing that much, why don't you just regear - get a set of 4.10's and an aftermarket limited slip or locker to go with it? No need to get a whole rear out of a boneyard.

 

thought about it, but i wouldnt trust myself doin it, and i sure as heck dont trust anybody else doin it figured itd be faster, safer, and easier to just get one from the salvage

 

and if i decided to do that, would the 4.10s be ok in the 8.8 rear end i have now?

 

Have a pro do the regearing for you. What size tires are you running?

 

ive got 275 75 16 buckshots if i remember correctly their just a tad bigger than the door jam sticker reccomends so its not a huge difference

 

Then 4.10's would be the best compromise between performance and economy. I highly doubt that you would be able to find a easy to install compatible axle assembly with 4.10's in a boneyard. If you professionally regear, you will be getting new parts properly installed, not used parts of unknown quality, and you can get an aftermarket limited slip or locker that's better than a stock Ford LS. I'm guessing $800 would do the whole job.

 

humm, well when you put it that way, the scrap yard here has them for $650, like you said unknown quality, unknown milage,

well, what should i look for, brand and all that other stuff

 

I'd shop for a good rear end shop rather than shop for specific brands of gears. We have a bunch of members in TX who should be able to give you some recommendations.

 

Go with Yukon gears, their good and priced fair. Find a good shop, it's not TO difficult of a job IMO, juts a little time consuming. Theres a write up in the how to's on this - I think efu did one , yea , here -

https://www.f150online.com/forums/ar...p-rev-1-a.html