Open differentials on FX4 REALLY??
#11
DHG FX4 SCab
Yes, my FX4 had an open differential. It came from the factory with open 3.55s. The open diff on an off road package sounded absolutely ludacris to me too. I have the original window sticker too with the FX4 package (with included rancho shocks, skid plates, 17s and "all terrain" tires)
Apparently GM did the same thing in the early 2000s.. standard open diff on Z71 equipped trucks.
But I have since upgraded to a TrueTrac.
Apparently GM did the same thing in the early 2000s.. standard open diff on Z71 equipped trucks.
But I have since upgraded to a TrueTrac.
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canddmeyer (02-02-2013)
#12
Senior Member
Your in luck than! I would go aussie or spartan locker. As for the mustang/explorer as long as its 31spline and not the 28 it will work. You will most likely need to rebuild the ls unit too.
#16
Senior Member
But how hard do you wheel it? I've seen lots of off road mags try to make an Ifs system work with a locker and it was always breaking cv shafts. They even put a 1 ton Ifs system in and still broke cv's. Then they up graded cvs and broke the diff. They also had 35-37 inch tires on it maybe it's because it was a chev also. If it works for you good. I've just heard lots of stories of broken parts on a locked Ifs.
#17
F150 Manic
But how hard do you wheel it? I've seen lots of off road mags try to make an Ifs system work with a locker and it was always breaking cv shafts. They even put a 1 ton Ifs system in and still broke cv's. Then they up graded cvs and broke the diff. They also had 35-37 inch tires on it maybe it's because it was a chev also. If it works for you good. I've just heard lots of stories of broken parts on a locked Ifs.
#18
Senior Member
Originally Posted by 4x4wolf
They always try big heavy trucks and big tires. I always wondered how well it would work on a truck like mine a regular cab and just 33's.
#19
They always used chevy's. They have weak split case diffs to begin with. My truck has 3.73's now. But I had 4.10's with 33" tsl's and never broke a cv or diff housing. I wheeled hard. Another reason fords are better.