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Posted by: Tigawoods May 22, 2017 - 11:45 AM

Here is a little review of the arms package Techno Toy Tuning offers for our chassis.

I wont really remark on the customer service experience I had with the company, if you want to read that you can go to my build page.



The kit replaces the control arms and rear trailing arms with solid spherical joints. The only one that utilized the OE rubber bushing is the trailing arm connection to the knuckle. You can use the OE bushing. I opted to order a Poly bushing for that. All the arms are adjustable and each end.

Poly Bush in knuckle


The kit comes with spacers that are inserted into the spherical joint so that it they retain the same width as the OE Arm bushings, and all the pickup points will remain the same and suspension geometry wont be affected.

The trailing arms come with 12mm spacers for the body connection.

The control arms utilize 14mm spacers for all their connections since the 12" long bolts used for all their connections are around 13.8mm

I found that their kit was incorrectly matched with our chassis. They supplied me with 12mm spacers for the control arm to knuckle connection as if that connection uses 12mm bolts. Which we all know it does not. I contacted them to correct them on that error. I am not sure if they have or not. If anyone runs into this issue, you can do one of two things to correct this: Have the 12mm spacers drilled to 14mm (a machine shop can do this easy, it is a pain to do it on a drill press, I didn't have luck trying that) OR calling them up and reminding them of that error and they will ship you 14mm spacers.

The control arm kit does not come with any nut bolts or washers that will be needed for the install. As it is currently, they only come with the 12mm nuts and bolts and a few miscellaneous washers. You can utilize the washers that come off of the OE Arms. If they dont revise the kit, then there are enough 12mm bolts between the Trailing and Control kit to mount the Trailing arms. If they do, then you will need to order new bolts from Toyota. I will add all those part numbers in shortly.

12mm top 14mm Bottom


The Toyota OE Replacement Knuckle bolt VS the Techno Toy Tuning provided bolt


12mm spacer on the 14mm OE Bolt


Beyond that everything else during install is pretty straight forward. Be sure to measure your old arms and set the new arms to that spec so it is drive-able. The go get an alignment.

Here are a few pics of the items and the process.










They help provide absolute feedback to the rear. Having no give to the arms puts all the movement in the coilovers and tires. I wasnt able to feel any additional NVH but thats mostly because my car is already on the high end of that spectrum.

Posted by: mi645 May 23, 2017 - 9:33 PM

Were they worrh it?

Posted by: Tigawoods May 24, 2017 - 10:39 AM

For me sure. For most everyone else the polyurethane upgrade will probably be fine enough

Posted by: Wild202 May 25, 2017 - 3:15 AM

I think dust, dirt and sand + water will get there and they will break down very quickly.

Posted by: Tigawoods May 25, 2017 - 6:12 AM

my car will see very little of those.
for a person whose car doesn't really see the elements, it shouldn't be a problem, but rod ends should be kept clean, dirt can stick to them and eventually wear them down (long term)

Posted by: Wild202 May 25, 2017 - 1:36 PM

Yes, if the car will stand 365 days a year, then it's okay.
Or twice a year on the track to leave.
It's just that in Russia we have dirt and puddles 0.5 meters deep on the roads.
I have not seen good roads, and for me it's amazing.

Posted by: Bitter May 25, 2017 - 8:15 PM

I bet you could get some tierod boots to sit over the joints and protect them from stray splashes and dirt intrusion well enough. Easy to push the boot back and inspect/clean/spray lube on the joints if needed.
http://www.prothanesuspensionparts.com/universal-dust-boots.asp

Posted by: Tigawoods May 26, 2017 - 6:17 AM

I was looking at actual rod end boots. Like these:

either one looks like it will work and isnt a bad idea to throw on for a bump in protection

Posted by: BonzaiCelica Dec 21, 2017 - 5:09 PM

if im not mistaken the ST185 chassis uses a spherical bushing in the rear knuckle.... were you able to measure the inner diameter of the knuckle oem bushing????

also for those looking for an quality rear control arms you, can look to HardRace Part #6304

They are $247 plus shipping to your state. THey ship out off florida....

Posted by: NgoFcukinWay Dec 24, 2017 - 11:30 PM

I needs dis....

Posted by: njccmd2002 Dec 25, 2017 - 9:27 AM

no you dont. You just want them...

Tiga needed them, he puts them to good use...


they look good ..... mmmm tempting.. but i dont need them....

Posted by: NgoFcukinWay Dec 25, 2017 - 10:40 AM

you right....

Posted by: BonzaiCelica Dec 25, 2017 - 11:19 AM

just for reference. HardRace offers these style rubberized bushings for our application only... but they also offer spherical bushings option for other chassis. so i take it these hardrace arent too bad for daily driving....

you don't need them. says the guy that tracks his convertible.

I probably wouldnt get these techno toy tuning unless im time attack every other month.

Posted by: njccmd2002 Dec 27, 2017 - 1:52 PM

to be honest ive only tracked it once, and did not like it. Mostly because i suck at it. Everyone tells me to try it again, which maybe i will, but i dont want to drop money if i wont use it..

I added the roll bar, it really added safety and rigidity. Oh and the oil pain, i had to do that, but all these susp mods make the car so rigid for the street, its not worth it....