Hey folks,

 

had an odd and slightly scary issue last night. 
 

I noticed a squealing from the rear 2 days ago so have the the car booked in to have the brakes looked at tomorrow. Last night I was driving at 50mph and I think one of the rear wheel momentarily locked up. I pulled over and all seemed ok but pulling into the driveway when I got home it did it again. It felt like the handbrake was on. 
 

I suspect I have a duff calliper but wanted check if anyone had any knowledge of similar issues?

 

For various reasons, I am suspecting some ongoing transmission/4x4 problems so hoping it’s not an indication that we a serious problem with that. 
 

Thanks

I can't imagine a mechanical scenario that would see one brake applied. Could traction control apply a brake if it got a duff reading from a speed sensor? That's possibly the cheapest fix in this scenario if your thinking you may have transmission worries instead.

Edited 25 March, 20215 yr by Me-109

Could just be dirt and rust built up on the caliper carrier seizing on the brakes until its heated up and expanded until it locks up. I would strip, clean and regrease the brakes to make sure everything is moving as it should in the first instance. Also check the handbrake linkages are not seizing on. A squeal from the rear is a tell tale sign that something is sticking somewhere.

 

Check the flexi hoses too, if they start to degrade then they can block causing a calliper to stay on

On 25/03/2021 at 22:33, langers2k said:

Check the flexi hoses too, if they start to degrade then they can block causing a calliper to stay on

Which is possible if the OP had braked and had one stick, but that's not how it is described. 

From the other thread it sounds far more serious.

On 24/03/2021 at 05:51, Jondotnet said:

For various reasons...

 

If the various reasons include things to do with the transmission, it might be worth outlining them, as they may help diagnosis.

 

Anyway, I have had something similar recently, and in my case (2WD car) it was to do with brakes sticking.

 

I came off a dual carriageway and there was an intermittent, rhythmic, squeal. Pulled over and it was apparent that one rear wheel was rather warmer than the other, and the rust pattern was not even (rusty for the outer few mm, clean inside that, and, to cut a long story short, the inner surfaces were worse that the outer, on both sides).

 

Applying the usual technique of precision banging (!), using a hammer and a long piece of wood (the correct piece of wood allows you to bang the calliper, and so free it up, without going metal-on-metal), without taking anything to pieces. This made the immediate problem go away. 

 

Problem now has a longer-term cure, in that callipers have been taken off and cleaned, and it has new rear brake pads and discs.