I recently purchased a 2005 Sport Edition 4x4 V8 currently at 177k and after looking at the service records it's still running stock shocks/springs.
There aren't any strange noises coming from the suspension, so I don't think the shocks are blown, but the ride is a little bouncy and from what I gather after 12 years of driving and 177k miles I'm probably past due for a shock replacement.
Research has led me to look at the Bilstein 5100 shocks (often paired with FJ springs), and I've come across the 6112 package as well.
The 4Runner is my daily driver, and I don't do any heavy offroading. I'm not looking to lift the vehicle dramatically, but I would like to bring the front end up a bit to straighten out the rake. Measuring from the center of the wheel to the bottom of the fender flare I'm seeing 22" in the rear and 19" up front - a 3" rake. Does this indicate that the springs ought to be swapped out along with the shocks? If the springs ought to be replaced, what's a recommended set that will pair well with the damping of the Bilsteins but won't lift the vehicle more than 1"?
I know there's a lot out there covering this general topic (and I've read plenty of the posts), but I'd be interested to hear what folks have to say regarding my particular situation. Thanks in advance!
I would suggest getting the Bilstein 5100 shocks and a new set of factory 4runner springs. I think that would probably work well, and the front of the 5100 shocks are height adjustable, one of the perches on the shocks equates to a 2.5" lift, so that should just about level out your ride.
FJ cruiser springs are heavier duty, and add some additional lift, so if you don't want the lift, then stay with stock springs. You could always keep the original springs, but I'm betting that after 177K miles, you'll see an improvement in ride quality if you replace them.
Last comment, I had a lift Jeep wrangler about 20 yrs ago, and the ride was Awful! I assumed (probably correctly) that the big tires and lift kit are what made a normally harsh Jeep ride, even worse -- and that probably WAS the case.
The point is, with the 5100 shocks with FJ coils, you DO get a lift, but the ride is really good. Some (including me) feel that the ride is actually better than stock, and by better, I mean more comfortable, and a softer ride over bumps and potholes and uneven surfaces.
So if you don't want a lift, because you want to keep your 4R lower, that's fine, but if your motivation is to preserve your ride quality, you may find that the 5100 and FJ springs are just the ticket.
The 6112 package also seems really nice, and I believe it was designed specifically for the 4R. It's more money, and I don't know how it performs, but I assume that it will be even better than the 5100.
Here's what one person said about the 6112s in a different thread.
Gave in and bought 6112's about a month ago; running 5100's on FJ coils in the rear.
Can't say enough good about the 6112's. The ride is truly smooth and firm at all speeds, unlike the adjustable 5100's, which were rough and always out of synch with the FJ coils. The difference is HUGE!
Seems like the way 4runners should have come from the factory. Finally satisfied after trying 5-6 different options/combinations. Couldn't be happier!
http://www.toyota-4runner.org/4th-gen-t4rs/192772-any-reviews-new-bilstein-6112s-2.html#post2022445
Let us know what you end up getting, and how you like it.