2nd look at 03 Tacoma front suspension

7wt

Expedition Leader
It shouldn’t come as any surprise to anyone that the Northeast is tough truck parts and coilovers are no exception. After almost five years of trusty service, it was time to replace my Donahoes with something that would work a bit better in the harsh weather environments we see. The Donahoes worked great for the uses they were designed for, namely high speed big bump travel with the added ability to add some preload to the coils to help carry extra weight in the form of bumpers and winches. The problem is, I don’t need either of those things. I would be better off with a suspension that emphasizes flex and durability. Besides, race truck parts are for race trucks.

I started looking for other solutions and naturally concentrated on the Old Man Emu stuff because they seemed to fit the bill for what I needed. However a few things irked me. More than a few reviews mentioned how they sagged or couldn't handle extra weight up front over time. Also there was the trim packer issue, some guys were needing to add trim packers to regain the hight lost after use. This didn’t sound like an install and forget solution so I held off making the order.

Then I came across Vermejo's rig article in Toyota Owner's mag. His truck uses the Sonoran Steel suspension system. After pestering him for his thoughts, I was encouraged by his feedback. So I called Steve at Sonoran for tech advice. His solution seemed to be perfect for me so I ordered them.

The Sonoran Steel coil assembly uses Bilstein 5100 ride hight adjustable shocks and Toyota Tundra TRD coils with some house bits Steve produces. The Tundra coils on paper seem like a perfect solution. The coil rate is softer than the Donahoes by a good amount, 650lbs verses something like the mid 500’s (I forgot the exact number). This alone should help my truck achieve the most out of it’s meager front travel. Also since the Tundra coils were designed to hold up a V8, I knew they would be able to carry the extra weight of a bumper and winch if I decide to add them later. The other benefit is the Bilsteins are sealed and will hold up to the weather. I have had Bilstein rear shocks on my truck in one way or the other since I bought it so I felt comfortable with their shocks. The last detail was that the coil assemble came completely assembled. This was important to me because I no longer had the stock Toyota top plate and other bits since I replaced those pieces with the Donahoes.

After driving it around for a week I can honestly say I made a great decision. The ride is a lot softer but still firm, it's like Lexus made a light truck. It also tightened up the front with all the little creaks and clunks completely gone. While I have not had a chance to stretch it's legs offroad, I did go down a washed out gravel road and it certainly seems like I have more up travel. Time will completely tell but so far it looks very promising.


The following pics highlight the install.

Here is what I was dealing with. Pretty gross and in need of some TLC.

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Old shock out, hit the area with a wore brush and a quick shot of Rustoleum to freshen it up.

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Two of the old, one of the new.

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Bolted in and ready to go. Simple and clean looks good!

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Back on all fours. I picked up almost an inch of lift.

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The CV angle looks good.

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Eww, nasty! You should see how rough these things look. The grade 8 hardware that holds them in the shock bucket are completely corroded. The aluminum top plate has all sorts of layers of salt and corrosion caked on, some comes off and some doesn't. The lower bushings are rusted completely and the finish on the coils has flaked off in some spots and rusted up. The driver side must be completely empty of juice judging on how much crap is in the lower spring bucket.

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cruiseroutfit

Well-known member
Are you getting any contact between the larger Tundra coil and the frame? I ran the Tundra/Bilstein setup on my 04' for a few months but on extreme droop the coil would ********** the frame, making a most annoying noise and creating a stress point on the coil. The problem does not occur on the similar platform 4Runner oddly enough. We checked it on several different Tacoma's and all had similar interference issues on full droop. I went back to the OME and now I'm running the 882, Nitrocharger Sport and pre-installed trim spacers, couldn't be happier and my front end is likely heavier than most. Winchbar, winch, shower, dual bats, SC, etc. Keep us posted on the Tundra coils, I'd be interested if your 03' is experiencing the contact.
 

austintaco

Explorer
I have had my Tundra coils on for 4 years on my 03 double cab and I have never noticed any rubbing on the frame, but I am going to look at it closely in the morning.

Is Sonoran still putting his own spec'd bilsteins on with the tundra coils or are they off the shelf units?
 

cruiseroutfit

Well-known member
I have had my Tundra coils on for 4 years on my 03 double cab and I have never noticed any rubbing on the frame, but I am going to look at it closely in the morning.

Is Sonoran still putting his own spec'd bilsteins on with the tundra coils or are they off the shelf units?

Good question. When we were playing around with all these we were using bferg's 4Runner and my Tacoma. Ferg ordered the coil setups from Sonoran, I used new coils from Toyota and Bilsteins from RCD spec'd for the Tacoma setup. We couldn't identify any differences between the two but obviously valving isn't external ;) However my issue wasn't so much with the valving or shock dynamics rather the rubbing. We then tried them on a 96' Tacoma with the same exact results a pronounced 'clank' as the coilover smacked the frame when the a-arm extended to full droop. Could likely have been addressed with a limiting strap but at the time the Nitrocharger Sports were just showing up to the US so I wanted to give those a go. Fixed my clank, my height and I like the ride. I wouldn't be opposed to another trial with the Bilsteins as I use them on lots of other Land Cruiser applications (SOA conversions for example) but I just don't have a reason to move things around.
 

Mrknowitall

Adventurer
Do any of you have experience with the NWOR progressive coils? seems like a good way to go (in a weather resistant, affordable setup), especially combined with the Bilstein 5100's.
 

7wt

Expedition Leader
Kurt,

This is very interesting. I use to have the Tundra coils on the yellow Bilstein HD's and I too had a clunk but it wasn't coming from any frame interference. It was coming from the internal bumpstops in the shock. They weren't designed to run any lift so they were pretty much sitting close to the bumpstops under normal driving. Any sort of offroad driving maxed out the droop and caused a loud clunk. I was worried about going this route again because I didn't understand how important matching the coil to the spring was. The Bilstein 5100's seem to be made for these coils and work like a charm. I am not sure if Steve has them custom valved or not but the results are fantastic. I do not have any clunks, rubs or any other issue to worry about. Back when I bought the truck I had it undercoated at Zeibart. The thick rubber sprayed on it makes it easy to spot when there is any rubbing, which I have none. Everyone makes a big deal about how stiff the Tundra coils are but the fact of the matter is they are a lot softer than the 650 lb coils that are on the Donahoes.

I am pretty anal about balancing stuff. If I had OME in the front, I need OME in the back. That also means I would have to have OME springs in the rear as well. I know, it's a sickness but it is how my brain works. I do not like their leafs, I would never replace my Deavers with them. Not wanting to experiment with how the OME shocks wold work with the Deavers, I planned to leave the rear alone. That meant keeping the Bilstein 5100's in the rear with the flexy leafs. The cool thing about my TRD/5100 front is that they seem to be very well balanced with the rear. Now I have a complete matching suspension and that is important to me.
 

lonzorizo

New member
These look pretty legit. I have 881's on my 03 double cab and I'm looking to change things up in anticipation for a plate bumper. Seriously considering these after reading this. Are the ride heights preset using the 5100's?
 
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7wt

Expedition Leader
Some flex pics from earlier today. The front is getting full movement up and down. The drivers side is about at full compression and the passengers side is at full extension. All four feet are on the ground.

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austintaco

Explorer
I have had my Tundra coils on for 4 years on my 03 double cab and I have never noticed any rubbing on the frame, but I am going to look at it closely in the morning.

Is Sonoran still putting his own spec'd bilsteins on with the tundra coils or are they off the shelf units?

Update:
When I replaced my brake pads, I had some time to look at what was going on with my tundra coil setup. I didn't see any frame rubbing, but the coil is contacting the stock "shock tower" on the driver and passenger side. It is very minor, but you can see where the coil is rubbing the metal.
 

Mattm94

Observer
I've had the Tundra TRD Coils w/ Tundra Bilsteins for several years.

On my second set of shocks... so I liked them enough to come back for seconds.

Couldn't know if SS has them custom valved, I didn't want to pay his prices so ordered the correct coils from TRDParts4u and the Tundra Bilsteins from Wheelers. Reused my Tacoma top plate and used a coil assembly tool from Harbor Freight... the shocks have 5 grooves to adjust preload and ride height. Coils are large and may contact frame or shock tower if not oriented correctly.

It's a great setup and can be had for very cheap if you just order up the shocks/coils and assemble stuff yourself. Any discount parts chain store should be able to assemble them if you don't want to.

The correct shock is the Bilstein 5100 ride height adjustable for any 99-06 Tundra. Currently about $225 a pair...

The correct coils are a progressive TRD spring and are NOT stiff. Currently about $120 each...

Left Coil Part Number: 48131-AF100
Right Coil Part Number: 48131-AF090
 
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austintaco

Explorer
Since we are talking about the Tundra coil, I found my write up from May of 2007 when I did the lift. Wow, time flies. In 07, Steve's kit did not use the adjustable bilsteins back then. I think he was still using special Tokico shocks.
http://www.yotatech.com/f2/my-doublecab-tundra-coil-swap-pics-118157/


And this is something I posted on another board when considering the lift. Here are all of the different coils for tundras:
there is a difference in length between the springs which might explain some slight difference in height between one setup and another.
Front, 4x2, 2 Dr, 6 cyl, w/o Bilstein shock opt Right
Front, 4x2, 2 Dr, 6 cyl, w/o Bilstein shock opt Left
Front, 4x2, 2 Dr, 6 cyl, w/Bilstein shock opt Right
Front, 4x2, 2 Dr, 6 cyl, w/Bilstein shock opt Left
Front, 4x2, 4 Dr, Double Cab, R., w/US mkt (352mm length)
Front, 4x2, 4 Dr, Double Cab, R., w/o US mkt; (344.5mm length)
Front, 4x2, 4 Dr, Double Cab, L., w/US mkt (355.5mm length)
Front, 4x2, 4 Dr, Double Cab, L., w/o US mkt; (348mm length)
Front, 4x4, 4 Dr, Double Cab, R., w/US mkt (363.5mm length)
Front, 4x4, 4 Dr, Double Cab, R., w/o US mkt; (356mm length)
Front, 4x4, 4 Dr, Double Cab, L., w/US mkt (369mm length)
Front, 4x4, 4 Dr, Double Cab, L., w/o US mkt; (360.5mm length)
Front, 4x2, 2 Dr, 8 cyl, w/o Dlx Right
Front, 4x2, 2 Dr, 8 cyl, w/o Dlx Left
Front, 4x2, 2 Dr, 8 cyl, w/Dlx Right
Front, 4x2, 2 Dr, 8 cyl, w/Dlx Left
Front, 4x4, 2 Dr Right
Front, 4x4, 2 Dr Left
Front, 4x4, 4 Dr, Access Cab, L., 356.5mm length Right
Front, 4x4, 4 Dr, Access Cab, L., 356.5mm length Left
Front, 4x4, 4 Dr, Access Cab, R., 351.5mm length Right
Front, 4x4, 4 Dr, Access Cab, R., 351.5mm length Left
Front, 4x4, 4 Dr, Access Cab, L., 363.5mm length Right
Front, 4x4, 4 Dr, Access Cab, L., 363.5mm length Left
Front, 4x4, 4 Dr, Access Cab, R., 358.5mm length Right
Front, 4x4, 4 Dr, Access Cab, R., 358.5mm length Left
Front, 4x2, 4 Dr, Access Cab, 6 cyl Right
Front, 4x2, 4 Dr, Access Cab, 6 cyl Left
Front, 4x2, 4 Dr, Access Cab, 8 cyl Right
Front, 4x2, 4 Dr, Access Cab, 8 cyl Left
 
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baja_banana

Observer
Ferg ordered the coil setups from Sonoran.

This is incorrect, Ben Ferguson purchased some parts from me but never did buy the actual product (front coil overs) we sell. I covered this in another Expedition Portal thread. The issues your are reporting you had do not apply to what I sell because you have never actually used what I sell.

Ben's ordered:

Adjustable trac/pnhard bar
Rear bump stops
Diff drop kit
Rear sway bar brackets (why I sold these separate I don't know, that is not typcial)

Later:

Shaved Upper A-Arms.

Ben never purchased shocks or coils or any of the parts to make the shocks/coils work. So why you are posting results from something you never purchased confuses me.

Steve Schaefer
Sonoran Steel Fabrication LLC
Tempe, AZ
 
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7wt

Expedition Leader
Having had a fair amount of time on the coil assembly now I can honestly say I made the best decision based on my needs. I love this suspension, much more than the Donahoes they replaced. The reason being is they work in all conditions I need them too in the terrain I drive. Even if I still lived in San Diego and spent a lot of time out in the desert I would still be using these coilovers. They work great but the best thing is they are a total install and forget. With salt on the roads up here I had to routinely hose the Donahoes down after a snow storm to help prevent them from oxidizing, not fun in the mid 20's at all. I can honestly recommend the set up from Steve, he was very helpful and patient with all my tedious question. It's kind of a leap of faith when you ditch something everyone says you have to have and try to find the best solutions for your needs. There is a lot if information out there and it's hard to suss out the correct information. In the end you just have to be willing to try different things to see what works best for you. For me, the brutally simple reliability of the sealed non-adjustable shock makes the most sense. Combine that with a spring that is soft but was designed to carry the weight of a V8 and you have the perfect trail suspension for an IFS rig.
 

cruiseroutfit

Well-known member
This is incorrect, Ben Ferguson purchased some parts from me but never did buy the actual product (front coil overs) we sell. I covered this in another Expedition Portal thread. The issues your are reporting you had do not apply to what I sell because you have never actually used what I sell.

Sorry, I can't think of the other thread but it was and is my recollection that Ben either ordered them from you or purchased a used set that came from a customer of yours... I'm honestly not 100% sure of either so I apologize if I'm incorrect. In that case, will you confirm as to whether or not your Bilsteins are different than the parts being sold by other vendors i.e. RCD? Can you tell us what is different (obviously I'm not asking you to divulge proprietary info but do you change the dampening rate? Change in overall length? I'm an engineer, "better" doesn't sell me on anything... numbers and explanations do :D

Its a non-issue for me, I was getting frame (coil bucket) interference with the Tundra coils and as noted my weights dictated a higher spring rate and firmer shocks. The majority of my customers are in the same realm but are generally not rock-crawling so much as loading the crap out of them. Different strokes for different folks.
 

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