converting corolla from 4x100 to 5x114

[wagonist]

If you used the 55mm centre bore rotor & a 54mm centre bore hub, the brake rotor would move around. You might only think it's 0.5mm movement in one direction, but think of the brake forces involved. Is it worth risking your life (or anyone else's) over?

The holes for the wheel studs are already too big (I'm only guessing that's so any heat in the rotor doesn't constrict the wheel studs & possibly causing a weak point), so this is the only way the rotor is located.

From my previous experience, the only difference between the ST184 & ST204 rear rotors is the centre bore, so if this is a problem, just use the matching rotor for the hub. Or machine the 54mm centre bore hub so that it becomes 55mm.

[Xauterus]

The later celica ones fit, I can confirm this because I took one off a car.

[ap7]

The later celica ones fit, I can confirm this because I took one off a car.

You sure?

I went and checked the ST204 and SV21 rear hub bearing assembly and the bolt pattern is a little different!

The 4 holes in the Levin/Corolla center hub assembly as below pic does not line up with the Camry & Celica one.


I did not check the actual stub axle, Levin/Corolla one is below:

[wagonist]

Has anyone asked a bearing shop whether the rear wheel bearings are the same?
Then it doesn't matter if the housing has a different bolt pattern, just put the Celica stub axle into the AE111 housing.

[Xauterus]

Thats good to see apart.
Now we need to see the 204 stub axle side by side with the corolla one.

Oh the one I confirmed fitted was the Front hub sorry , I should have made that clear.

[ap7]

Has anyone asked a bearing shop whether the rear wheel bearings are the same?
Then it doesn't matter if the housing has a different bolt pattern, just put the Celica stub axle into the AE111 housing.

I had the st204 bearing (same as Camry SV21) last weekend but in the rush forgot to check if the bearing was the same size or if the internal diameter of the bearing hole was the same. As you said as long as the Celica stub axle diameter is the same as Levin/Corolla it can be pressed in.

I'll try to check it this coming weekend...it'll be easier if someone had the Celica stub axle thou?! The parts shop is getting a little annoyed with me

[Xauterus]

Hello
How is this conversion going?
I have got a Celica rear stub axle off a ST204.
This does require some machining to fit the AE 101 rear rotor over the flange, Due to the bigger diameter of the celica disc rotor centre. Rather than just machine it down to 125mm like the Corolla one I machined it with a step so it doesnt break through the holes completely. I had a AE101 rear rotor at work to test fit this.
The stub diameter is 30mm.
I need someone to measure the Corolla stub axle as i wasnt going to pull apart the ones I had just rebuilt.
I have included some pictures.
The front drive flange is off a ST204 as well and definitely fits a corolla with the 55mm bore disc rotors.
I need to know if the AE101 rear disc is the same as the AE111. The AE111 does not have the handbrake inside does it?

[TERRA Operative]

The AE101 and AE111 rear brakes are identical AFAIK.

[ap7]

Some measurements for the rear stub axel:

[ap7]

....................................

[Xauterus]

Ok
It looks like the only difference is the spindle diameter that passes through the bearings and the seal diameter. The Celica one is 30mm, while the Corolla one is 28mm for the bearing. The seal area is 42.3mm for the Celica and 41mm for the Corolla. All the lengths liik fine. Can you tell me the thickness of the flange where the wheel bolts on? On the Celica it is 9 mm thick. Also is the thread 20mm ?

[wagonist]

Has anyone measured up the bolt spacings that hold the stud axle assembly on?
Because if they match, then the entire rear end including backing plates & calipers could be changed over to the Celica stuff.

This would mean though that the handbrake cable would need to work with the drum handbrake assembly on the Celica (which attaches to the backing plate)

[Xauterus]

I checked the bolt spacing and its quite a bit different unfortunately.
The ST204 has a weird backing plate for the caliper, that looks more like a ae82 Corolla. The caliper bolts to a pressed plate rather than to the cast upright. The other drama is that the caliper are on different sides of the disc.

[wagonist]

Pity.

Why's the 204 version weird? It's pretty much how most cars with an internal drum handbrake (certainly Toyotas anyway) seem to be set up. I don't know of many cars after 1995 that carried over a mechanism that activates the rear discs for the handbrake.
Built in redundancy. If the rear brake pads or calipers don't get serviced, then there's still a separate braking system.

[Xauterus]

The system is not weird.
I said the backing plate idea was. On other corollas after ae82 the caliper bolts to lugs on the upright itself. Thats all.