This discussion should include what size TBU folks are using - 199 or 231. 231's seem to have more problems with ABS and soft pedal; very few examples of those issues with 199's.

Also, the primary benefit of TBU is not so much stopping power as it is higher thermal capacity and hence reduced likelihood of warping or fading when going down mountain roads.

The actual braking capacity is not likely to change unless you have crappy brakes - I was able to trigger ABS with the original brakes, and that's the limiting factor.

I'm very happy with my 199 upgrade, but again, not for the stopping power but for less fading and warping.

I agree with Leon. I went 231 route. And after changing my brake booster, T100 master cylinder, stainless braided lines, calipers, rotors, pads, and full bleed with new brake fluid... pedal has more travel but when brakes grab... They grab! First few drives after the full system change I'd press like gradual like normal then do a harsh jerk stop. Now I know when the grab happens. I get no shimmy coming down mountain roads like I used too.

The pedal travel, stiffness, and grab will vary on the many factors at play here.

Please let us know the outcome of your service visit. I’m having the EXACT same symptoms with the 231 TBU.

So I recently bought a 99 Highlander edition. I absolutely love it. It’s been supercharged and runs awesome. The only problem it has is the front rotors are warped (at least one is). So I wanted to replace them but have obviously heard the tundra upgrade is the way to go. I am on a pretty tight budget so I’m debating whether I should upgrade or not. I don’t tow and don’t plan on running anything larger than what I have now (265/75/16). However, I saw a guy online is selling his rotors, calipers, and pads off his 2008 tundra because he is doing a TRD brake upgrade. I am wondering if the second gen tundras brakes are the same as the first gen brakes that everyone is using for the upgrade. He is selling them for $275. From what I can tell it is everything I need for the upgrade so the price seems great. I’m just not sure they would fit and I’ve searched everywhere and can’t find any info on the second gen tundras.

What did you learn? What did you have to do to fix the problem?

If it helps, running the vehicle while doing the bleed can be all that's needed for this issue. Unless the issue is air trapped in the master cylinder.

If I had to guess nothing changed after the dealer service department bled the brakes. Softer pedal and more pedal travel is the cost of the TBU install. Its interesting that after some people even swapped master cylinder's nothing changed. I'd keep the brakes OEM, I don't think TBU provides enough benefit to deal with the issues of living with them.

I have zero issues with my TBU. I run the 199 mm wide rotor variant of the caliper. They even use the same pads as stock.

I also haven't had the rotors warp after this change ever again either.

What can happen is your hubs go out of true, and this will correct that issue.

If folks want to change the or not, that's up to them.

I know, in my case, with rotors not making 6 months to a year without warping no matter what I did.

The change stopped this issue for me.

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Did you mean pad, not rotor? 199mm is the pad width for the smaller SW13E calipers while larger 13WG/13WL calipers use 231mm wide pads, there were no changes in rotor diameter and thickness when Toyota went to larger rotors in the later year first-gen Tundras

Correct. Brake pad the difference is wider rotor in the smaller tundra calipers vs stock.

The longer calipers are different. You notice the pad backing plate is different. Longer backing plate and longer calipers. Plus they will not fit most 16 inch aluminum rims. These being the longer tundra calipers.

I have used stock brake pads on the smaller tundra/sequoia calipers and they seem to fit my rims well..

My only reason for upgrading is to eliminate my warping rotor issues and that it does.







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I know about Tundra calipers, owned my 2000 Tundra since new Originally had the smaller SW13E then reman'd WG or WL (don't remember offhand), I do remember doing some minor trimming to the backing plates. Those remans are seizing up now and have a pair of brand-new (but aftermarket) Raybestos 13WLs to install this week.

I prefer Raybestos brake pads and rotors. I believe the smaller tundra are SW13E. [ I could be wrong] My front backing plates are gone. The rust belt ate them. :[

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Same here. I've been using their Element3 (formerly EHT) pads and rotors on other vehicles for a while. I've had good luck with their new calipers on my beater Honda so hopefully the Tundra ones will fare just as well.

Correct. The earliest Tundras had the smaller calipers, forgot what model year they changed to the larger calipers. The 13WG was the first of the larger calipers then the 13WL is the latest version of them.

My parents' GX470 backing plates are getting there The 4Runner and Tundra ones are in decent shape

My neighbor recently acquired this 2000 Tundra and he's looking to get Raybestos rotors and pads. Great to hear it is a good option. The tires are due for replacement so he ordered the toyo tires from 4Wheelonline and he'll have them installed next week.

Did any of you guys find a fix the long pedal travel? This in my only complaint with the TBU...