Superflex With Bilstein 4600 and 5100

Tyler James Inc

Senior Member
Seems like there has been a huge wave of suspension threads recently, and I happen to have a very strong opinion on a couple things- particularly referring to my suspension.
*DISCLAIMER*
Aside from the components used, and the measurements given- the following is all MY OPINION.
My setup-
'97 4Runner
Front- '99 "Tall" springs, and Tundra 5100 on setting 3 of 5.
Rear- ToyTec Superflex coils(3.75" advertised lift) with the center bump stops/coil isolators removed(mine measured 1/4").

Ground-to-flare measurements are with 42psi in 315/70R17 BFG KO2 tires- with 12k miles on them- and over 3/4 tank of fuel. I'm on very close-to-flat ground.
Front-
38 1/8"(1/16" higher on DS, and 1/16" lower on PS)
Rear-
Driver- 40"
Passenger- 39 1/2"

From center-of-hub measurements-
Front-
21 5/8"
Rear-
Driver- 23 1/2"
Passenger- 23"

It's "common knowledge" 3rd gens have DS lean, and the Superflex coils are said to compensate that. However, as you can see in my above measurements, my DS actually sits 1/2" higher than the PS- even with an almost-full tank of fuel.
I can't say enough good things about the '99 tall springs with the Bilstein 5100. I had stock 250k mile shocks with 2.5" pre-load spacer, and .5" top hat spacer before I switched to the '99/5100 combo. Rides 100% better than that setup. And by "better", I mean more comfortable, and MUCH more controlled.
I installed the Superflex coils and 33-187174 Bilstein 5100 shocks a couple months before I got to get the new front suspension. I was very happy with the height, ride, and load carrying capacity. I don't carry much weight, but with an additional ~300lbs in the rig, they sagged about an inch, and still rode/handled great.
However, I thought they were limiting my up-travel, so I swapped them out for OEM '04 Tundra TRD 4600 shocks. They are an inch shorter, so I thought they might work well- if nothing else, it would help me figure out what length shocks I need.
After installing the 4600 rear shocks, the rear became SUPER bouncy and uncontrolled. It unloads super bad when braking, and around corners on windy roads. If you hit a dip, around a corner, on a windy road- better be prayin, 'cause you're 'bout to need Jesus.
They weren't brand new when I installed them, but they only had 20k miles on them, and the reason I got them was because my FIL took them off his pickup- due to the fact they were so horribly under-dampened. He replaced them with 5100's, and would still like a little tighter valving than the 5100, but he's satisfied.
I made a video to show how badly they control the bounce, but it's not letting me upload the video.
Here's a couple pics of how I currently sit at the aforementioned measurements. The rear shot was to show the DS being higher.
40a7d0661a865d7b88111f65c58684f2.jpg
36da902390326b541b9551f0e80c9937.jpg
08923ba9c89bddb160780a7f177a8b90.jpg

I'm pretty particular about a lot of things, but the lean doesn't bother me one bit. I couldn't care less, to be honest. It probably sits level with me in the driver seat anyway.
 
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Seems like there has been a huge wave of suspension threads recently, and I happen to have a very strong opinion on a couple things- particularly referring to my suspension.

This is exactly what all suspension threads and information should be like. Exactly what was done and exactly what it measures out. Anyone who supplies information similar to "it look like, maybe, I think, was told, possibly, et all" should have to buy beer for who ever asks!! They make tape measures for a reason...used them since the beginning of time for a reason.

BESIDES....BECAUSE I F'N LIKE IT...really doesn't impart the asked for information.

Cheers!!!! I would buy you a beer/drink just for posting this!!
 
Haha thanks [MENTION=119226]reelamin[/MENTION]
I need to add the center-of-hub to fender measurements to rule out the tire size factor.
Really wish Tapatalk would upload my video, but it doesn't seem to want to.
 
^ Agreed 100%. Actual measurements would seem to be required, but so many threads are devoid of them. I'm kinda surprised the '99 was that tall. I mean, he says the rear is in the 3" lift range, and the '99 springs up front work just fine with it.

Stupid question time. I see a lot of peeps using the '99 tall springs, up front at least. Can you still buy those new? If so I assume you just get them from any Toyota parts seller?

Looks good! I'd be annoyed by the taller drivers side, probably put a spacer in the other side to fix it. But I'm more than a bit OCD, so YMMV.
 
^ Agreed 100%. Actual measurements would seem to be required, but so many threads are devoid of them. I'm kinda surprised the '99 was that tall. I mean, he says the rear is in the 3" lift range, and the '99 springs up front work just fine with it.

Stupid question time. I see a lot of peeps using the '99 tall springs, up front at least. Can you still buy those new? If so I assume you just get them from any Toyota parts seller?

Looks good! I'd be annoyed by the taller drivers side, probably put a spacer in the other side to fix it. But I'm more than a bit OCD, so YMMV.

Every rig is so different....mine is a 96 with original front springs...measures 21" hub to fender!!! That is unheard of...but it is what mine measures at....when only 1% actually measure and the rest "look" who actually knows. I have spent a stupid amount of time and thanks to a lot of people who actually provided real measurements I was able to make some decisions.
 
As far as the 4600's that felt bouncy, how sure are you that they weren't blown? I've ridden on blown 4600 front shocks and the feeling I got by essentially riding on springs only seems to match your experience with the 4600 rears. All of the reading I've done on the 4600's says they're a firm shock and the 5100/ 5125 are much softer. Having driven on both 4600 fronts and 5100 Tacoma fronts, I'd say the 4600's are a bit firmer. I ran the stock TRD springs off a 2000 Tacoma with the 4600's, but on the 5100's I had the "99 tall" springs compressed to the middle notch. The "99 talls" are known for being a pretty soft spring, so I guess that contributed to the softer feeling setup.

Oh BTW, I knew when I saw this thread that [MENTION=119226]reelamin[/MENTION] would be one of the first posters on it :lol:
 
Thanks [MENTION=120497]WallyWest[/MENTION]
I believe the '99 tall springs give 1" lift. Maybe more like 3/4" if they're higher mileage?
I have adjustable perch Tundra 5100 on setting 3 of 5, so the front has a combined lift of about 2".
Not a stupid question at all! I can't say for sure- as I haven't checked- but I'll bet you can still bey them new.
I'd actually love to have a new set [emoji23]
 
Oh BTW, I knew when I saw this thread that [MENTION=119226]reelamin[/MENTION] would be one of the first posters on it :lol:[/QUOTE]

Damn....my tab is getting really large but I'm good for it...just like Blitzkrieg...I stand by my offers....but happy to pay it so others have real numbers not "It looks like"....faaaaaaaack....that is the crap I tell my wife....really...it looks like....GDFMITA !!!
 
[MENTION=68460]Dezert4Runner[/MENTION]
The whole reason my father in law took them off his '04 TRD Tundra at 20k miles is because he couldn't stand how under-dampened they were. He bought the truck brand new, and said they were like that from the beginning. That said, maybe TRD specs a softer dampening on their 4600, and maybe a non-TRD 4600 would be tighter? I can't say I have any experience with any other 4600.
It's not really relevant to compare shocks when using different springs, that's for sure.
The '99 tall are definitely softer than the '97 springs with the pre-load spacers! Soft springs with tight shock dampening is something I have become quite fond of. Feels like a trophy truck going over big long speed bumps [emoji23] But really, it soaks them up beautifully.
I'm not worried about sagging, 'cause the only front end weight I'll be adding is a winch, and with syn line, the weight is negligible. Still have adjustment to go up, but I don't think I would have to.
 
[MENTION=128258]rallypoint_1[/MENTION]
The only rate info I can find for the Superflex says 240, but I'm pretty hesitant to believe that. I feel that they are more like a 200lb rate!
Even if they compress easily, it shouldn't have the uncontrolled bounce/bob that I get. The fronts are pretty soft, but very controlled/no bounce on the front.
I still have the 5100 rears, and am planning on using them when I install my friends lift on her 2014 4R. Planning on stealing her OEM Tokico rears to try on mine.
 

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