T100 Brake Booster Upgrade

Did you feel any difference going up to the 14wa’s? Firmer pedal? More bite?

 

Excellent post. Thank you for sharing!

 

If you're going to do it, I would consider buying calipers from the OG, Geoffrey Beers. I keep seeing people on Facebook that bought from him and had success.

I really don't think the T100 swap is necessary if the Lexus calipers are modified correctly.

 

100% the pedal feels amazing and stops on the dime

 

Hey! Did I never update my caliper install? After milling, the calipers and rotors installed perfectly.

Sorry about being MIA. Lots of life getting in the way this year!

 

jumping into this older thread here...

i hear alot about there being two versions of the booster one with short and one with longer studs. the longer allegedly allowing you to use the aluminum spacer. does anyone have any info on this? do we not need the spacer? i saw the OP here didnt use it but in some other threads they did. just curiuous before pulling the trigger for my 2005 ac 4x4 with abs. thanks!

 

Hi guys, so I need some help. I recently did the T100 booster and master conversion and now my pedal is extremely still. I trimmed about 3/8” of the shaft off and turned the nut that holds the pin all the way in. My stock booster still sat lower, but I had no more adjustment in the new booster to go any further. Any ideas? The booster is an oreillys so it should be good, idk if i’m loosing pressure or what. The pedal works but is too hard. After cruising the freeway and as i’ about to get off the pedal feels like it has absolutely no assist.

 

Stock

 

T100 after trimming and adjusting all the way down.

 

As you can see the stock one has way more adjustability.

 

Another thing I saw was that when I went to put the pin in it was super difficult. Another thing I thought about possibly doing was to tap the shaft to get more threads out of it therefore to have more adjustment. Any help is appreciated.

 

When you did the swap did you use the spacer included on the factory booster? Tried to do it without and brakes felt like crap so went back to factory because I was limited on time I had to tinker. I cut the shaft and ran it without space cause with space the studs on the t100 one I got were too short. Thanks in advance

 

Just installed the brake booster and master cylinder. My brakes pedal is pretty hard to press now and the brakes don't really work. I'm not sure of my issue. When I crack the brake lines at the master cylinder and press the pedal, the pedal sinks and is easier to press. (it also shoots brake fluid out of the craked fitting). I'm not sure what could be causing the "lock up". Anyone who has done this upgrade experienced something similar?

 

You sure the T100 MC / booster were both good?

Was it necessary to make any adjustments to your push rod depth so you're engaging the MC properly?

What state the calipers om with no pedal pressed, clamping or open?

If you're not catching where I'm going with this, I'm curious if maybe you didn't adjust things out, so the brakes are remaining engaged at all times, and when you're pressing the pedal in, you're hoping to engage calipers that are already fully engaged because you failed to make necessary adjustments.

 

All reasonable questions. The T100MC and booster were both purchased new. Not OEM however. The MC is a an ASIAN so I feel confident in that. The booster is an ACCARDONE so I'm not as confident in that. But I should still be able to stop the vehicle with a heavy foot and a bad booster.

The push rod was red locktighted in place. I didn't feel any pressure when putting the MC on. but that is a good area to check. I might space the MC out with washers to test that theory before breaking the locktite.

I'll throw the truck up on jack stands and test the calipers/ brakes to see if there is any hang up and report back.

Thank you for the ideas.

 

There was a little hang up with the master cylinder so I spaced it out with 3 washers. The pedal stroke is much better. I then bled the system but the trucks brakes slowly. It can stop the truck but it doesn't stop near as quick as it should. I also can't lock the brakes up, even if I stand on the brake pedal.

 

Sounds like you need to adjust your pushrod, it wasn't adjusted properly.

On mushy pedal, you bled in the order of pass ear, LSPV, driver rear, passenger front, driver front, right? (You did bleed the LSPV, right?)

Did you use pressurized bleeding, or shove-foot-to-foor bleeding method?

 

It's not really the pedal that is mushy. The pedal feels like it should braking wise. The pedal is also stiff when the truck is turned off. But the truck just takes more time to slow down. (much longer than it should). Pumping the brake pedal while it's on doesn't change the pedal feel either.

I did bleed in that order and made sure to bleed the LSPV. I initially used a vacuum bleeding tool then used the old shove foot to floor after driving it and not getting the results I was expecting. I got similar results with both.

I may look into bypassing the LSPV with a wilwood unit. That is the only part of the system that I have yet to replace. The tundra is a 2000 without abs so it's about as simple as it gets.

 

So I'm starting to get the symptoms of a bad BB (paddle chattering (only has happened a few times) stiff pedal and noticing longer braking distances my abs light has been on and off the last two-three weeks) anyways I want to upgrade to the t100 BB and MC but I'm wondering which parts to get? I found the oem BB for about 700 but the MC is discontinued. Which would you guys recommend? I really don't have pickaparts near me and I'm not really comfortable with eBay lol. is something off rockauto usable or is it a LBJ topic haha.

 

I have this for sale. Think it came off gx470

 

I wouldn't know if that's compatible

 

I was told this was a good upgrade for our trucks. Others might know more. P/n on it is SK 007 L37 1332

I have no incentive to sell , it was given to me, just trying to help u out. U pay for shipping you can have it. If it works just send me whatever i was asking for it and if not return is totally cool. Its new. If too much hassle no worries. I was told it was for a gx480 or t100 or something. Some guys on here can chime in im sure.

 

I'm okay but I appreciate the offer.

 

Do you still have it? Do you know if it's a comparable upgrade to the t100 upgrade? My brakes have been acting super weird lately. Sometimes working fine, others the pedal just goes to the floor. I was going to try to do the T100 upgrade but this may be an equivalent.

 

I'm going to attempt this upgrade. Is there a specific MC that I'll need to be compatible with this booster or can I just buy any OEM/Aftermarket booster? The link is currently turning up with nothing on the write up.