Rear Disc Brake Theory

This has been a long awaited topic amongst all, as we’ve all pondered and wished we had rear disc brakes. Unfortunately, Toyota didn’t see the demand for them in our US market.

I’ve spent countless hours researching and I’ve discovered that Toyota developed parts that use similar bolt patterns for certain parts. So I’ve noticed there’s a pattern on some cars with regards to their rear brakes…thus having the potential to have brakes interchangeable.

I have come to the conclusion that the following two setups will fit the rear of the RAV4.1’s in the US. I’d just like to note, since I’ve sold my RAV4 I can’t confirm these setups with work, it’s truly up to another brave RAV4 owner to give it a go!

The most difficult part of both setups is acquiring the back plate which is how it all comes together. These back plates are expensive from the dealer and can cost upwards of $300. The easiest way to do this is to swing by a local wrecker or junkyard and buy them there…make sure they are complete with the entire brake assembly.

Here’s what you’ll need:

– Backing Plates
– Drum Parking Brake Assemblies
– Drum Brake Pads
– Rotors
– Brake Pads
– Brake Shims
– Brake Calipers
– Brake Calipers Brackets
– Parking Brake Cables (may not need them as stock cable compatibility has not been confirm)

The first setup comes from our beloved family minivan, the Toyota Sienna specific the 3rd generation Sienna. While I unraveled these I discovered this setup is used on the rear of other Toyota and Lexus models:

TOYOTA SIENNA 2011-2015

TOYOTA HIGHLANDER 2014-2015

LEXUS RX350 2010-2015

LEXUS RX450H 2010-2015

Here’s a few photos of the major parts you’ll need with specs.

backingplate2 backingplate

2012siennarotors 2012siennacalipers 2012siennapads

Backing Plate Part Numbers:

LEFT REAR BACKING PLATE 46504-08020

RIGHT REAR BACKING PLATE 46503-08020

Caliper Bracket Part Numbers:

LEFT REAR BRACKET 47822-0E020

RIGHT REAR BRACKET 47821-0E020

Caliper Part Numbers:

LEFT REAR CALIPER 47830-0E020

RIGHT REAR CALIPER 47850-0E020

 

The second setup comes exclusively from theToyota Rav4.2 or simply the 2nd generation Rav4. These are a bit harder to find do them being a less common option and less of them on the road. Note these setup does not require a brake caliper bracket as it was design to have less parts.

TOYOTA RAV4 2001-2005

rav4.2rotors rav4.2calipersrav4.2pads

Backing Plate Part Numbers:

LEFT REAR BACKING PLATE 46504-42021

RIGHT REAR BACKING PLATE 46503-42021

Caliper Setup Part Numbers:

LEFT REAR CALIPER 47750-42050

RIGHT REAR CALIPER 47730-42050

And if you don’t this is possible just check out our Rav4 friend in Russia

http://www.drive2.ru/cars/toyota/rav4/rav4_i/gte-starichok/journal/178490/#post

I have a partial Sienna setup for sale if anyone is interested…just shoot me an email or comment. To be continued….

 

Front Brake Theory Pt. 2.5 – Stage 1 Brake Upgrade

I’d like to revisit my posts on brakes, as some questions have surfaced and I’d like to help answer them. For some people out there, my brake setup is not ideal because it requires some grinding for fitment and wheels spacers to use 16inch wheels…so, how does one still upgrade without having to do all that?

Well, good news is you still can upgrade from your stock setup still use your stock 16inch wheels. I haven’t had the funds or time to experiment with this and I can’t make an promises but I have a pretty good feeling this new setup will work.

Here is the Stage 1 Brake Upgrade:

Brake Caliper with Bracket – Celica ST (95-99)

Part Numbers:

RH 47721-20370 or 47721-20371

LH 47722-20080 or 47722-20081

stcelicabrakecaliper1stcelicabrakecaliper5

Rotors – Lexus RX300 (99-03)

Part Number: 43512-48011 or 43512-48060

rx300brakerotorrx300brakerotor1

 

Pads – Celica ST (95-99)

Part Number: 04465-20140 or 04465-33021

stcelicabrakepads

I can’t confirm any modifications will be needed but if it does, it will be less then my Stage 2 Brake Upgrade. This setup will feel and work just fine with the stock brake master cylinder.

Front Brake Theory Part 2 – Stage 2 Brake Upgrade

Welcome to part 2 of my Front Brake Theory! I left off with alot of material from my first post…some of you have messaged me about a follow-up. I have to apologize for a late response. Since, I have selected my setup and have been testing it for over 4 months.

DISCLAIMER/WARNING: This is simply a guide, written to be and is intended as informational tips. This is not a 100% accurate or guaranteed foolproof guide. Work on your own vehicle at your own risk. If after reading through these tips, you do not feel comfortable doing the work yourself, please seek the help of a professional mechanic. I cannot be held accountable for your safety or vehicle. I do not take any responsibility for any damage to personal property or injury to yourself.

Here is the Stage 2 Brake Upgrade:

I’ve selected: Brake Bracket – Celica GT (95-99)

Part Numbers:

RH 47721-20420

LH 47722-20120

 96celicafrontbrakebracket3a 96celicafrontbrakebracket396celicafrontbrakebracket1

Rotors – Lexus LS430 (01 – 06)

Part Number: 43512-50220

Ls430rotorCalipers – Toyota Avalon (95-97)

Part Number:

RH 47730-07020

LH 47750-07020

avalon96frontcaliper avaloncalipers

Pads – Toyota MR2 Turbo (92-95)

Part Number: 04465-17060

Here are some reference shots: Rotor Comparison…Lexus LS430 (01 – 06) on the left and the Rav4 (96-00) on the right. IMG_8925 Test Fitting…the Celica GT (95-99) Brake Bracket. The dust shield was bent slightly to accommodate the larger 315mm diameter rotor. IMG_8924 More Test Fitting…the Celica GT (95-99) Brake Pads (these were too thick to seat properly into the brake pads clips). IMG_8928 Here is the caliper mounted and the complete what I’ll call “prototype” version of this setup.

IMG_8930IMG_8976

Fitment

There are few spots on the Celica Brake Bracket that need to be grinded to support the (1)thicker rotor, (2)the larger diameter as well as (3)the offset of the rotor. The newer setup will not work with the stock 16 inch wheels unless you use a wheel spacer (25mm thick)…I’m using the H&R one on my stock 16 inch wheels and it barely fits. Its probably better to use the Celica GT caliper over the Avalon calipers because the master cylinder will work much better with the single piston setup. I need to install a larger one with my setup, which means more $$ …which is what I was trying to avoid.

Driving Impressions

It’s a tight fit that will create a front brake bias (with the twin piston calipers) but works with no brake fade unlike that stock setup. Since I did not change/upgrade the master cylinder, the pedal travel has increased…while its good for pedal modulation, its in need of a larger bored cylinder due to the larger hydraulic volume in each caliper. Brake fade resistance has definitely improved. I plan on upgrading the rear brakes, changing the master cylinder and adding some stainless steel brake lines. Good luck, drive safely, and have fun!