agentjohnson

I run powerstop slotted rotors with ceramic pads. The jeep will stop on a dime. Very well worth it, IMO. Easy install as well.

adamisadam

Minor update at 125 miles. I just performed two long ABS stops in a gravel parking lot. There is absolutely no change in pedal travel after doing them.

To recap, the new Teraflex braking system (fronts, rears and master cylinder) works very well despite the long travel of the brake pedal before it engages. If I give a quick pump it will raise the point of engagement on the pedal. It's just like when drum brakes are not adjusted properly if you've ever experienced that. (These are discs.) But once engaged the brakes stop very well.

I will wait about a week and then rebleed the brakes just for good measure.

GoBig

Try bleeding again and see if there's air in your system. I used a power bleeder and it took a whole day to get all the air out. I have no pedal travel.

adamisadam

You have NO pedal travel? As in the brakes grab within an inch of applying the brakes? Is that with the Teraflex master and big brake kit?

Maertz

Mine was the same. Long pedal, at first but after bleeding the piss out of its a pretty damn good pedal stroke i can lock them up with probably half a pedal stroke pushed

adamisadam

Hmm. ok. Well, my mechanic said he'd bleed them again, no problem. I guess that's what I'll do.

Why did you have to bleed them so much? Was air stuck in the ABS? Did you have the scan tool to open the ABS?

Maertz

I had air in my abs.. I had no tool so I took it off road and locked up the brakes alot offroad to activate abs and push it out. Then bled. I repeated a few times. I had my master cylinder replaced and my abs out for a long while as i was relocating a ton in my engine bay.

GoBig

Exactly!!!!

GoBig

I didn't change out the master (still stock) and I can lock them up about half way.

SoK66

Mine has the same characteristic. What's happening when you pump the pedal quickly is the pistons in the front calipers don't retract fully before you apply pressure again. If there was residual air in the system the pedal would slowly sink towards the floor. With this system it doesn't do that. Again, this is a characteristic of a master cylinder that's too small for the size of the bores in the calipers.

Wanted to point out that it's unlikely air is in your ABS controller, as the spools close off the motor pump unit until activated. Even if there was the ABS section is closed off until the controller activates it. It would have no effect on your pedal position. This system won't purge the ABS air by activating it. The dealer Starscan routine manually opens one spool at a time to allow pressure to force any air completely through the system. The routine requires pressure bleeding (not pumping the pedal) at fairly high pressure. The steps are 1) bleed the system normally, 2) bleed each corner using the Starscan routine to hold the ABS spools open one at a time, 3) bleeding the entire system again. The factory manual says each corner should be pressure bled for 30 seconds during bleeding.