Brake grab\lock
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Elder User
Joined: Aug 2002
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From: VA/USA
Brake grab\lock
Guess this is as close as I'll get to a "brake" forum - any help on why the rear (drum) brakes on my `99 Ranger are grabbing\locking at slow speed? Have almost 30k on `em but still got maybe 5k of shoes left - I sprayed `em w\brake cleaner and blew `em out with air, but that only helped for a few days - appreciate any help . . .
Post Fiend
Joined: Nov 2001
Posts: 14,947
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From: Topsfield, MA
Brake grab\lock
Mine did the same thing in rain when it was slippery if the truck sat for a few hours for some reason. The seals arn't leaking right?
Primary rig is Green Thunder:
95' F-150 XLT 4x4, 302, 5 spd, MSD 6A, Flowmaster Exhaust, Sunroof, Clear corners w/ Diamond headlights, CD player with 2 10" subs and some 32" BFG Muds
.
Thats it for now, saving for a stang. Check out my Gallery for a look-see.
Justin - One Happy FTE Member
Primary rig is Green Thunder:
95' F-150 XLT 4x4, 302, 5 spd, MSD 6A, Flowmaster Exhaust, Sunroof, Clear corners w/ Diamond headlights, CD player with 2 10" subs and some 32" BFG Muds
.Thats it for now, saving for a stang. Check out my Gallery for a look-see.
Justin - One Happy FTE Member
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Elder User
Joined: Aug 2002
Posts: 773
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From: VA/USA
Brake grab\lock
[updated:LAST EDITED ON 12-Oct-02 AT 00:34 AM (EST)]That is correct - nothing is leaking - though something may be before long as I did over-spray the brake cleaner on some of the rubber part of the wheel cylinder, reading NOT to do that AFTER I had already done it, and yeah, my problem is more pronounced during\after rain or dampness and after sitting awhile 
- thanks, Glenn . . .
- thanks, Glenn . . . 
Post Fiend
Joined: Jun 2002
Posts: 13,873
Likes: 3
From: Atlanta GA
Brake grab\lock
I do not know how you estimated how many "K" you have left on your brakes. But, obviously something is wrong and it might be that the shoes are worn pass the replacement depth (you should not wear them down to the shoes or even close) or they are glazed from heat. The best way to gauge replacement time is to buy a depth indicator (used for tires and brakes) that cost about $2.00.
On your Ranger I believe 2 mm without rivets is the replacement depth. You might have cracks in the shoe face. Your drums might need to be turned! Your ABS sensor might be messed up. You might need to flush your brake system if something is plugging the RABS valve or it might be as simple as you need to replace the brake springs.
I would start with replacing the shoes, springs, and turning the drums. Flush the brake system.
On your Ranger I believe 2 mm without rivets is the replacement depth. You might have cracks in the shoe face. Your drums might need to be turned! Your ABS sensor might be messed up. You might need to flush your brake system if something is plugging the RABS valve or it might be as simple as you need to replace the brake springs.
I would start with replacing the shoes, springs, and turning the drums. Flush the brake system.
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Elder User
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From: VA/USA
Brake grab\lock
[updated:LAST EDITED ON 12-Oct-02 AT 11:20 PM (EST)]Is the flush difficult? What does it entail? Thanks . . . PS the "estimate" on the "K" I have remaining on my shoes is just that - an estimate. As opposed to brand new shoes (thickness) or rivets digging into the drums (thiness\WORN OUT), experience, knowledge of my driving style and routes, expected\anticipated driving conditions (weather, roads, etc.), I ESTIMATE (approx.-safely) 5 THOUSAND (if you prefer over "K") miles worth of service life on my rear shoes . . .
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