Rear brakes dragging

Reply Subscribe

Thread Tools

Search this Thread

Jul 10, 2015 | 09:36 AM

#16

Petza914

RL Community Team
Rennlist Member

Joined: Oct 2007

Posts: 28,647

Likes: 8,436

From: Clemson, SC

Debrue, I have a pair of working rear calipers off my '79 from when I did my GTS upgrade if your interested in having a spare set. PM or email me at petza914@gmail.com and we can figure out a price. I also have a pair of fronts.

Jul 11, 2015 | 12:28 AM

#17

mark kibort

Rennlist Member

Joined: Feb 2003

Posts: 29,828

Likes: 218

From: saratoga, ca

Quote:

Originally Posted by Petza914

That clicking noise could very possibly be the brokenn parking brake spring that I mentioned in a previous post as it gets stuck on things as the wheels are rotating and once broken allows the shoes to get cocked inside the drum which causes resistance. The current replacements are an upgraded version. It's unlikely though that both sides would break at the same time.

I had that happen to me! but it was a clicking sound ! those little buggers!

Jul 12, 2015 | 08:49 PM

#18

James Bailey

Addict
Lifetime Rennlist
Member

Joined: Feb 2009

Posts: 18,061

Likes: 10

the early cars the master cylinder each half is plumbed to one front caliper and one rear caliper.... in other words diagonally. So much different than the later cars.....

Jul 14, 2015 | 04:33 AM

#19

The Forgotten On

Nordschleife Master

Joined: May 2012

Posts: 5,241

Likes: 439

From: Thousand Oaks California

Quote:

Originally Posted by James Bailey

the early cars the master cylinder each half is plumbed to one front caliper and one rear caliper.... in other words diagonally. So much different than the later cars.....

I had the same exact issue on my 81. It's brake system had never been touched even down to the blue bias valves.

I replaced the brake master cylinder and did the customary brake fluid flush and the issue went away, which is why I posted what I did above.

It could be an entirely unrelated problem but the seals are 35+ years old and could warrant a replacement if the fluid hasn't been flushed at regular service intervals like most of our cars.

Jul 14, 2015 | 01:57 PM

#20

James Bailey

Addict
Lifetime Rennlist
Member

Joined: Feb 2009

Posts: 18,061

Likes: 10

my point was you need to know which wheels are dragging....the early cars have two brake proportioning valves on the firewall. They have small internal passages and sometimes chunks get stuck in them which can lock up one rear caliper....

Jul 17, 2015 | 05:07 AM

#21

Debrue

Thread Starter

Intermediate

Joined: Nov 2014

Posts: 36

Likes: 0

From: New York, NY

I check the e-brake it seems to be working fine

today I was parking on a slight incline and in neutral with the no brakes I could hear the groaning from the front brakes. They were definitely sticking.

so I was mistaken it is the front brakes not the rears that are sticking.

I guess that means master cylinder. Sounds expensive.