I have a 2011 FX4 screw. The front shocks were done and replaced at 24,000 miles under warranty. The rear shocks are now gone at 45,000 miles (not under warranty). For mostly highway driving that seems a bit early to me. Any suggestions on new rear shocks (no lift, no drop) and what is the level of difficulty in doing it yourself.

 

look at Rancho or Billstein for replacements....ain't to hard to replace the rears....

 

with regards to shocks.....IMHO:

1) Koni- Excellent for racing applications- overpriced for street applications

2) Tokico, QA1 & Bilstein- A very good shock for street/strip applications. If you are running very stiff tires on the street (such as Bridgstone or tires with profiles shorter than 50 series), these provide the extra give that you need for both comfort & stability

3) KYB- A very good shock for street/strip applications. If you are running a softer tires on the street (such as BFG or tires with profiles not shorter than 50 series), these provide the extra stiffness that you need for both comfort & stability. The Exel-G’s (formerly GR-2) are the equivalent to the Edelbrock IAS automatic adjusting units. Overall, stiffness between the Gas-a-just and the GR2’s are the same, the difference is the GR-2's valving which stiffens things up from a oem setting to that of the Gas-a-just units.

4) Gabriel- A very nice good quality HD OEM replacement type unit.

5) Monroe- stay away from that junk!

 

Also recommended to replace shocks as a set. If you buy any of the aforementioned shocks for the rear only, you'll not have a very balanced package. And with the quality of just about any aftermarket shock available for your truck these days, it'll be noticeable. Probably not dangerous by any means, but certainly less than ideal.

Your front shocks were replaced with stock replacement parts and I asure you, they are not rock stars by any means. If it's a budget issue for you, my vote is to wait until you can do them all; you'll be glad you did.

 

I agree, replace all four.