• Welcome Visitor! Please take a few seconds and Register for our forum. Even if you don't want to post, you can still 'Like' and react to posts.

Brake pressure doesn't always match


Speedwagon

Well-Known Member
Joined
Apr 8, 2008
Messages
249
Vehicle Year
2002
Engine
4.0 V6
Transmission
Automatic
2002 Ranger 4x4 XLT.

About 18 months ago, I started to have the rear wheels lock up at low speed light application braking, but only 1 would do it. So I replaced the brake cylinders, as with 220k miles I figured they were due, and they are cheap.

Many months later, the same thing happened again on new brake cylinders. I assumed I just had faulty parts (a bit too common these days), and just replaced them again.

Over the last several months, while I haven't had either rear lock up at light brake pressure slow speed stops, I have had odd issues overall now. I have replaced all the rubber lines, as well as the master cylinder at this point. I also inspected, cleaned, and did a rebuild on the front calipers.

But I get inconsistent brake pressure at the wheels, when not changing the pedal pressure.

Sometimes I will be holding the brake pedal, and suddenly the brakes grab more than they were a second ago. Only feel this effect at slower speeds, so I don't know if it happens at higher speeds.
Sometimes the pedal will suddenly move down more when not changing foot pressure.
Sometimes I hear a small clunk from one side in the front (I don't think it's consistently the same side, but I'm not sure) when applying the brakes at slow speed
I've gotten a C1939, reset it, and had it return.

I'm not sure how to test for the C1939, but I also don't know if that is a symptom or cause here.

How would you suggest I proceed in correcting this issue?
 
i wonder if you have a vacuum leak at, or near, the booster?

my ranger will lock the back tires up at slow speeds in the morning. it always has. i guess since its a single cab and is very light back there so the shoes grab quick when cold, since it only does it for the first few miles of driving
 

Sponsored Ad


Sponsored Ad

TRS Events

Member & Vendor Upgrades

For a small yearly donation, you can support this forum and receive a 'Supporting Member' banner, or become a 'Supporting Vendor' and promote your products here. Click the banner to find out how.

Recently Featured

Want to see your truck here? Share your photos and details in the forum.

Ranger Adventure Video

TRS Merchandise

Follow TRS On Instagram

TRS Sponsors


Sponsored Ad


Sponsored Ad


Amazon Deals

Sponsored Ad

Back
Top