Rear brakes issue
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Trailering
Joined: Nov 2012
Posts: 17
Likes: 9
Rear brakes issue
1989 F250 7.3 IDI
After driving the truck for a while the brake pedal gets really hard and the rear brakes are dragging. Dragging so much I can sit stopped at idle and the truck will not move. By the time I reached home the both rear brakes were smoking and smelled terrible. I let the truck sit and cool off and the brakes are normal until several miles of driving again. Is this an ABS sensor, proportional valve issue. I am not sure where to start. Any pointers would be appreciated.
Thanks
Jeff
After driving the truck for a while the brake pedal gets really hard and the rear brakes are dragging. Dragging so much I can sit stopped at idle and the truck will not move. By the time I reached home the both rear brakes were smoking and smelled terrible. I let the truck sit and cool off and the brakes are normal until several miles of driving again. Is this an ABS sensor, proportional valve issue. I am not sure where to start. Any pointers would be appreciated.
Thanks
Jeff
Tuned
Joined: Sep 2024
Posts: 487
Likes: 122
From: Ougadougou
Were the rear brakes worked on recently? The auto-adjusters could have been installed backwards, maybe? The drum brakes on a Sterling axle are super easy to deal with. Just remove the wheel and pull of the drum to check for obvious issues. If your master cylinder is ancient there could be a failure there. There should be one rubber brake hose that feeds the rear metal lines--maybe a problem there? When you bleed the rear lines do you get normal fluid flow? Personally I always recommend replacing any suspect brake system components because they are cheap and easy. I recently replaced all rubber hoses, front calipers, pads, rear shoes and hardware, and MC for under $300 which is cheap peace of mind in my opinion.
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Trailering
Joined: Nov 2012
Posts: 17
Likes: 9
The brake have not been worked on recently. I recall hearing that the rubber lines as they degrade can act as a check valve. The flexibly line seems a cheap place to start. I have never replaced it and I have had the truck for 10+ years. Thanks for reminding me of the flexible line to the rear end.
Jeff
Jeff
i ain't rite
Joined: Mar 2005
Posts: 65,507
Likes: 5,565
From: Marlboro Mental Hospital.
The brake have not been worked on recently. I recall hearing that the rubber lines as they degrade can act as a check valve. The flexibly line seems a cheap place to start. I have never replaced it and I have had the truck for 10+ years. Thanks for reminding me of the flexible line to the rear end.
Jeff
Jeff
Fleet Owner
Joined: Jul 2006
Posts: 20,361
Likes: 822
From: Mi'kma'ki
Exactly.
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Trailering
Joined: Nov 2012
Posts: 17
Likes: 9
Rear Brake issue solved
Replaced the flexible line to the rear end and bled the brakes. I finally got to do a real test. I drove it about 100 miles and the sticking issue is solved. The brake pedal is better than ever. I appreciate the replies and suggestions. This site is so helpful and you guys are great.
Thanks again.
Jeff
Thanks again.
Jeff
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