Brake upgrade part number help

[Westcoast78]

Hi. I have a 93 HZJ73, my front brakes need to be changed. I figure I'd get the bigger 4 runner calipers, pads, rotors. Eventually later on get the 80 series brake booster and a better master cylinder. Can someone please tell me what would fit and if maybe there is a better solution. Thanks

 

[Hulsty]

I'm not aware of a rotor size upgrade, but definitely the larger calipers/pads are a help, not they should be matched to the master cylinder. I fitted HZJ75 calipers, which I believe are the same as 4Runner, DBA XP pads, but the biggest improvement came from the Master cylinder and 80 series booster. Do the booster first.

 

[OGBeno]

Hi. I have a 93 HZJ73, my front brakes need to be changed. I figure I'd get the bigger 4 runner calipers, pads, rotors. Eventually later on get the 80 series brake booster and a better master cylinder. Can someone please tell me what would fit and if maybe there is a better solution. Thanks

JDM Truck HZJAnything after 1990 have the same brake system as a 4Runner/Surf of the same time period. Pads/Rotors/Pads. Basically through 1999 (at least for the JDM).

****JDM TRUCKS ONLY****

And none of this is an upgrade. These systems are the same. It basically Toyota parts rationalization.

 

[Westcoast78]

Good idea to do the booster first but my front rotors are warped and they now squeal. I was hoping to change some stuff first before getting a new booster. Maybe I'll order it all at once.

 

[Jull]

I ordered this 80 series booster for my HZJ73 from Partsouq, the price was so tempting. But I'm not sure about the "made in Germany" thing though.. https://partsouq.com/en/search/all?q=4461060783&qty=1

 

[TreadingLight]

I would be surprised if your hzj73 is heavy enough to warrant bigger brakes. Are you having issues?

Even with my heavy hzj75 troopy, when I was having brake overheating issues, I looked at upgrading to larger brakes but my issues were all solved with maintenance (the LSPV in my case).

If you can lock up your tires on pavemt and brake on a grade w/o overheating then bigger brakes will do nothing for you.

If you can't do those things then you'll want to figure out why. Would be a shame to spend money on ineffective brake upgrades. I almost did.

 

[Westcoast78]

I would be surprised if your hzj73 is heavy enough to warrant bigger brakes. Are you having issues?

Even with my heavy hzj75 troopy, when I was having brake overheating issues, I looked at upgrading to larger brakes but my issues were all solved with maintenance (the LSPV in my case).

If you can lock up your tires on pavemt and brake on a grade w/o overheating then bigger brakes will do nothing for you.

If you can't do those things then you'll want to figure out why. Would be a shame to spend money on ineffective brake upgrades. I almost did.

I have 33" tires. I can't lock them up. No overheating issues. I need new rotors and pads anyway so why not if it's an easy upgrade? New calipers, pads and rotors in the rear. (everything ordered for 2007 FJ Cruiser)

 

[Westcoast78]

I ordered this 80 series booster for my HZJ73 from Partsouq, the price was so tempting. But I'm not sure about the "made in Germany" thing though.. https://partsouq.com/en/search/all?q=4461060783&qty=1

View attachment 4151746

Good price but I want to keep most stuff OEM.

 

[Jull]

Good price but I want to keep most stuff OEM.

I took the non-original one to my 73 to test if it works, if not, I'll get the original one. I have the original 80 booster (44610-60822) installed in my 75.

 

[TreadingLight]

if it's an easy upgrade?

I gues it depends on your definition of easy and whether that includes being easy on your wallet. And all upgrades have implications. Swap too many things at once can make getting it dialed in complicated.

If it were me I'd want to understand why my brakes aren't functioning and make targeted fixes.

That said, this thread has some excellent discussion on 70 series brake mods and may be helpful.

Thread 'Better 70-Series brakes?'

Oct 8, 2019

Now that our FZJ75 is in the states for a while, there are a few things I want to do to it, and high on the list is to improve the braking of its four-wheel-disc system. My first move will be to install DOT 4 or 5.1 brake fluid, semi-metallic pads, and possibly braided lines. However, the real improvement would come from installing larger-diameter or wider rotors. Installing multi-piston calipers by themselves is pointless. Drilled discs do nothing to reduce fade. Heavier stock-sized discs (for example, with extra cooling vanes) would also help. Does anyone know of an aftermarket source or...

• Jonathan Hanson
• Replies: 95
• Forum: 70-Series Tech

 

[Westcoast78]

Thanks for the link. I definitely need new rotors and pads.

 

[JuanJ]

Hello,

A 70 Series-specific upgraded brake booster is available from Terrain Tamer.

You may have to do some cutting with the 80 Series booster to make it fit into your 73 Series.

Regarding calipers and rotors, 70 Series parts are good enough.






Juan

 

[Westcoast78]

Hello,

A 70 Series-specific upgraded brake booster is available from Terrain Tamer.

You may have to do some cutting with the 80 Series booster to make it fit into your 73 Series.

Regarding calipers and rotors, 70 Series parts are good enough.






Juan

Thanks Juan! I’ll check out Terrain Tamer.

 

[DrRock]

I recently went through my braking system and there are the items I would address. I also run 33” tyres:

1. Replace front pads with factory pads
2. Sand rotors first and see if this gets rid of the pulsing. Warped rotors symptoms many times are actually incomplete pad deposition on the braking surface of the rotors.
3. Baseline the rear drums, pistons and ensure factory setup is per the FSM.
4. Confirm LSPV is adjusted correctly.

As others have stated, upgrading calipers is not required and might in fact be masking other issues with the braking system.

Once this is complete and nothing is out of spec, your braking performance should easily lock up your wheels at speeds less that 40kph. Above that I can threshold brake my 75 easily and actually overpowering the system reduces stopping power. I also went with the 80 series booster and clevis from @cruisermatt and this made a nice difference to the pedal modulation. Clevis pictured below which extends the rod for proper pedal height. Not sure if this is required for your truck but wanted to include this in case.

 

[Westcoast78]

I recently went through my braking system and there are the items I would address. I also run 33” tyres:

1. Replace front pads with factory pads
2. Sand rotors first and see if this gets rid of the pulsing. Warped rotors symptoms many times are actually incomplete pad deposition on the braking surface of the rotors.
3. Baseline the rear drums, pistons and ensure factory setup is per the FSM.
4. Confirm LSPV is adjusted correctly.

As others have stated, upgrading calipers is not required and might in fact be masking other issues with the braking system.

Once this is complete and nothing is out of spec, your braking performance should easily lock up your wheels at speeds less that 40kph. Above that I can threshold brake my 75 easily and actually overpowering the system reduces stopping power. I also went with the 80 series booster and clevis from @cruisermatt and this made a nice difference to the pedal modulation. Clevis pictured below which extends the rod for proper pedal height. Not sure if this is required for your truck but wanted to include this in case.

View attachment 4152872

Thanks for the advice! I'll take the front wheels off today and inspect the front brakes. I'll definitely be getting the 80 series booster at some point.

 

[Westcoast78]

I bought these parts today $240 all in.