[driftfreaq]

Ok so I am going to toss this in here just so people know for anyone doing the 2025 MY rear control arm brackets upgrade you do need the upper cover for it . Do not worry it’s not expensive part #
48753-06080 and 90 .

The original bracets are shallower and have a deep metal cover vs the new plastic ones. pics of the 23-24 ones to note size. Sorry do not have pic
of new one in car already😂

 

[F.D.Sako]

Ok so I am going to toss this in here just so people know for anyone doing the 2025 MY rear control arm brackets upgrade you do need the upper cover for it . Do not worry it’s not expensive part #
48753-06080 and 90 .

The original bracets are shallower and have a deep metal cover vs the new plastic ones. pics of the 23-24 ones to note size. Sorry do not have pic
of new one in car already😂

Did you change any other suspension bits or only install the RCA bracket and cover?

 

[driftfreaq]

Did you change any other suspension bits or only install the RCA bracket and cover?

Put in Annex Fast Road coilovers 6/9 spring rates changed out the rear upper shock mount bolts to the newer ones as well as the front ball joint bolts. Chose not to go the slimmer rear sway .As I saw Toyota doing that because they had stiffened the rear springs and shocks for 2025MY and I suspect it was to keep the car from any kind of oversteer. That might have resulted in combination with leaving the bigger 23-24 rear swaybar in. I prefer throttle on oversteer to understeer or lift off throttle oversteer. Driving style preference ? You might say. Drove FWD got used to throttle off oversteer but coming from RWD always preferred throttle on.

 

[youngtl]

Ok so I am going to toss this in here just so people know for anyone doing the 2025 MY rear control arm brackets upgrade you do need the upper cover for it . Do not worry it’s not expensive part #
48753-06080 and 90 .

The original bracets are shallower and have a deep metal cover vs the new plastic ones. pics of the 23-24 ones to note size. Sorry do not have pic
of new one in car already😂

View attachment 35905
View attachment 35904

How hard was the install, does it just bolt on like Legos for the 2023 cars? And do you feel any difference?

 

[wheelhaus]

I installed the rear trailing arm mounts and the accompanying plastic covers (the metal dome covers no longer fit). Anyways, I am pleasantly surprised they make more of a difference than I expected. Rear end feels a little more predictable, and the rear end squat is nigh eliminated. The nice part is that it helps keep the front end a little more planted.

 

[Smoovy]

I installed the rear trailing arm mounts and the accompanying plastic covers (the metal dome covers no longer fit). Anyways, I am pleasantly surprised they make more of a difference than I expected. Rear end feels a little more predictable, and the rear end squat is nigh eliminated. The nice part is that it helps keep the front end a little more planted.

Is there anything required to install them other than bolt the trailing arms in? I'm interested. I see the trailing arm mounts listed. What other parts are required for this? TIA

Rear Trailing Arm Mount (LH): 48727-06060
Rear Trailing Arm Mount (RH): 48717-06030

 

[F.D.Sako]

Is there anything required to install them other than bolt the trailing arms in? I'm interested. I see the trailing arm mounts listed. What other parts are required for this? TIA

Rear Trailing Arm Mount (LH): 48727-06060
Rear Trailing Arm Mount (RH): 48717-06030

@driftfreaq 's post above mentioned covers for each bracket (48753-06080 and 90)

 

[driftfreaq]

How hard was the install, does it just bolt on like Legos for the 2023 cars? And do you feel any difference?

they bolt in. Yes the car is a lot more planted in corners and there is no squat. It just goes with a ton a of grip . I can’t wait to go through the Michelins so I can put lighter wider tires and wheels.

I should add in case you did not know I also put in Annex Coilovers. The car is just a blast now and it rides so nice I actually have started to forget its on coils.

 

[wheelhaus]

The install is just nuts and bolts, so if doing typical suspension/chassis/brake work doesn't scare you then this shouldn't either. I pulled the trailing arms off with the original brackets and mounted them together on the bench. I used a 2x4 as a reference jig, comparing the original knuckle mounting points (two big bolt holes) with the original bracket to where they land with the the new bracket, but adjusted them to be about 0.8" higher to account for the drop I'll get with the Ohlins installed. This just means the bushings will have minimal or no twist preload when the car is settled. Made sure both bracket/arms were at identical angles after being torqued. The main bushing is inaccessible when its all installed, so might as well estimate it beforehand.

48727-06060​	Suspension Trailing Arm Bracket​
48717-06030​	Suspension Trailing Arm Bracket​
48753-06090​	Mount Bracket Cover​
48753-06080​	Mount Bracket Cover​

 

[NuBieGRCorolla]

I learned this the hard way buying a harness of Amazon for my 25 and it doesn't fit. I have a guy who could make this for us if we get enough. LMK if you have a 2025 and interested.

Don’t know where you are with this. I think this deserves a new post.

 

[Bryota_GR]

GR COROLLA | GR | TOYOTA GAZOO Racing

The GR Corolla was developed by putting into practice the concept of making ever-better motorsports-bred cars, emphasizing honing cars to win races and making them commercially available.

toyotagazooracing.com

TOYOTA GAZOO Racing Launches Evolved GR Corolla in Japan | PRESS RELEASE | TOYOTA GAZOO Racing

TOYOTA GAZOO Racing (TGR) has started accepting orders for its evolved GR Corolla, a model that leverages insights gained by competing in motorsports. Orders will be accepted through Toyota dealerships across Japan from today, February 4, and actual launch is planned for March 3.

toyotagazooracing.com

 

[Bryota_GR]

 

[F.D.Sako]

Like they said, yes, yeah, yeah.

If I understood that video correctly, are they releasing an upgrade parts kit?

 

[Bryota_GR]

If I understood that video correctly, are they releasing an upgrade parts kit?

Believe only in Japan.

 

[Kuro5ake]

Believe only in Japan.

I really hate that because back when Toyota first teased the NA market with a GR Hot Hatch they stated: "While GR Yaris isn't coming to the U.S., perhaps it's time the U.S. got a Toyota hot hatch to call its own. " The GR Corolla was supposed to be ours and ONLY ours, Japan, the EU, and Australia weren't supposed to get it and I'm still a bit bitter about it since they get all the cool stuff and we get shafted everytime.

 

[GRMike13]

Will upgrading to coilovers on the 25" GRC's be a good thing? I'm hesitant on messing with something that seems tuned very well from factory.

 

[F.D.Sako]

Will upgrading to coilovers on the 25" GRC's be a good thing? I'm hesitant on messing with something that seems tuned very well from factory.

If OE suspension meets your needs, then no need to replace perfectly functioning parts. If you're going for a specific handling characteristic or looks, then it may be worth it.

 

[GRMike13]

If OE suspension meets your needs, then no need to replace perfectly functioning parts. If you're going for a specific handling characteristic or looks, then it may be worth it.

Ok. I definitely want it a little lower, similar to the Morizo and the ability to adjust height since I'll be moving to different tires and/ or wheels.

 

[black86]

Ok so I am going to toss this in here just so people know for anyone doing the 2025 MY rear control arm brackets upgrade you do need the upper cover for it . Do not worry it’s not expensive part #
48753-06080 and 90 .

The original bracets are shallower and have a deep metal cover vs the new plastic ones. pics of the 23-24 ones to note size. Sorry do not have pic
of new one in car already😂

View attachment 35905
View attachment 35904

The install is just nuts and bolts, so if doing typical suspension/chassis/brake work doesn't scare you then this shouldn't either. I pulled the trailing arms off with the original brackets and mounted them together on the bench. I used a 2x4 as a reference jig, comparing the original knuckle mounting points (two big bolt holes) with the original bracket to where they land with the the new bracket, but adjusted them to be about 0.8" higher to account for the drop I'll get with the Ohlins installed. This just means the bushings will have minimal or no twist preload when the car is settled. Made sure both bracket/arms were at identical angles after being torqued. The main bushing is inaccessible when its all installed, so might as well estimate it beforehand.

48727-06060​	Suspension Trailing Arm Bracket​
48717-06030​	Suspension Trailing Arm Bracket​
48753-06090​	Mount Bracket Cover​
48753-06080​	Mount Bracket Cover​

im finally installing these this weekend. along with the rigid collars. anyways on an FB group someone put up the FSM on how to install these. did you guys follow it?
this is for MY25

this is for MY23

mounting point is 30mm higher but the arm is 95mm lower...

 

[wheelhaus]

im finally installing these this weekend. along with the rigid collars. anyways on an FB group someone put up the FSM on how to install these. did you guys follow it?
this is for MY25

I did not follow the FSM precisely, but may have indirectly. I bolted the mounting cups and arms using an quick jig I made with 2x4s that would provide consistent measurements with both L and R arms. I took the original arm position and angle, and did some math that made sense at the time that would approximate a "neutral" position with the new brackets and the car lowered ~20-25mm.

edit- OK now I see what you mean. The measurement A is from the same flat mounting surface on both mounts, regardless of the arm's mounting point. In the '25 FSM they're telling you to mount the arm at an angle that puts the arm's upper bolt hole nearly 4 inches lower than it is on the '23 FSM. Something seems off.