Welcome Visitor! Please take a few seconds and Register
for our forum. Even if you don't want to post, you can still 'Like' and react to posts.
Gotta watch those salvage yards! I've been looking to upgrade from 3.73 Open Diff to 4.10 limited slip. On Monday, my repair shop called and said they had found a 2007 FX4 with 4.10 Limited slip and 7000 miles on it, totaled! We got the front diff and entire rearend for $1700! Thankfully, I was at the shop when the delivery truck arrived yesterday. The front diff came off the truck looking newer than my own and was 4.10. However, the rearend looked not quite as clean and after examining the tag (Thanks to TRS' Axle Tech Sheet), turned out to be an old Limited Slip 7.5 rear axle (obviously not from an FX4) with 3.73's. Needless to say, it went back on the truck.
You're right... the rear obviously wasn't from the same truck that the front came out of! It was an old 7.5" Rear axle with much more than 7000 miles on it... that was my point! I am now installing the 4.10 FX4 Front Diff (7000 mile salvage yard unit) and updating my own Rear Diff to 4.10 and LS to match the front.
No, an LS unit is a completely new carrier, its costs lots of $$$ to buy and have installed. What is your goal? Do you NEED an LS? I find them useless offroad and there only purpose ont he street is putting power to the ground (which isnt a problem for an RBV anyways), If its for off-road, get a locker, there is just no substitute.
You don't seem to understand how an axle works, your current carrier (NOT the housing) is irrelevant when talking about an LS. An LS, detroit locker, ARB, ect are all brand new carriers that replace the stock open carrier. A "lunchbox locker" uses a stock carrier, but a lunchbox locker isnt an LS, its a locker.
No. You can have any LS installed that is designed for your rearend, just be prepared to cough up some $$$. An LS unit is a brand new carrier, therefore your stock one doesnt matter! The new carrier is placed on the housing and the original ring gear is bolted to the carrier.
For a small yearly donation, you can support this forum and receive a 'Supporting Member' banner, or become a 'Supporting Vendor' and promote your products here. Click the banner to find out how.
