The end-all thread for AE92 drum to disk rear

[aaron7]

Ok, I've searched and read everything, but there always were loose ends!

First: Do you need to change the master cylinder or proportion valve?

Second: Do you need to change lines?

Third: What parts are needed from the GTS to do the swap?

Fourth: What is the part number of the needed handbrake cable?

Fifth: Am I missing anything?


I have someone local that has a GTS they are parting out, and I would like to convert the SR5 to rear disc. I've heard that it doesn't matter either way, as the Corolla only uses the rear brakes 15% of the time, but I just don't want fugly drum brakes back there!

[freakinbox]

like I just typed in another post
"Why does everyone want disc breaks soooooooo bad.. a rear brake cylinder is cheaper to replace if it breaks. rear calipers tend to always sieze. Unless your takin the car to a track all the time it's not worth your time or money do to the swap"
they are more of a headache... one of the guys at the meet who used to have an ae92 was telling me they always sieze. I plan to keep the drums unless I get into some form of racing with the car. Which in that car I will find away to balance the breaks so the rears are used more

[aaron7]

Disc brakes don't always seize. Whoever told you that obviously has other problems that they don't know about.

I want discs because they look better. That's all. I know there isn't really a difference in performance, as stated above, due to the rears only being used 15% when stopping compared to the fronts.

[lifeisviewtiful]

hey aaron7 when i spec'd out the rear brake conversion for my ae101 and found one on ebay, i needed the entire rear hub and a proportioning valve from the gts, and about 3 hours to spare. honestly the best way to do it would be to see if you can get the hub WITH the caliper and such attached to it. this will make the conversion as painless as possible. if you have the entire hub, then the only headache will be fixing back the hand brake. the proportioning valve is a necessity, or else the rear pads will wear out quicker than the front believe it or not.


hey freakinbox, i agree with aaron7 on the siezing issue, your friend probably did his rear conversion with a set of rear calipers that were fudged up and needed a rebuild.

[aaron7]

I am getting everything already assembled from a GTS. I was told the proportioning valve doesn't have to be changed? See, I'm lost again haha!

I will be getting new calipers/pads/rotors too.

[freakinbox]

actually no! he was right they usually do sieze. COUNTLESS cars come into the shop for breaks and most of the ones that have rear disc have to replace the calipers. They don't have enough force applied to them and the slides start to fuck up. eventually the piston goes and then the caliper is done.

I know on domestics aaron you have to replace the proprotioning valve if you want the rear's to work proper after the conversion

and you might have to change the lines too since I don't think a caliper has the same fitting as a brake cylinder. and you can't put compression fittings on break lines (not here at least)

[aaron7]

Ok this was asked by the person with the parts car that I'm buying the parts from:

today i was taken off the calipers with the E-Brake bracket & mounting bracket but i notice there is the bigger bracket for the lower, upper ,and sway bars that the mounting bracket with the caliper bolts onto, you will also need that, and my question is will you also need the axels, i would not know if the SR5 are the same

[cuzman]

I was told by my parts importer the proportioning valve has to match eg drum for drum disk for disk...ihave so far changed every thing brake related to gt.....except the rear drums and proportioning valve...it all works sweet on the road even under extream braking around the mountain areas...

[aaron7]

Wait... so what did you change if you still have drums?

[cuzman]

booster,master,calipers,disks,backing plates,hubs,bearings..and bigger wheels as you need at least 14 inch to fit over the caliper...no line change as it bolted up..left the pro valve back stock for now!