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1998 Ford F-150 Drum Brakes Lock up and Pulse badly (REAR BR

Tiny
EASTCOASTMC
  • MEMBER
  • 1998 FORD F-150
  • V8
  • 4WD
  • AUTOMATIC
  • 190,000 MILES
Rear brakes locking up!
1) Replaced front and rear e-brake cables (they were rusted and bound up)

2) Replaced shoes, hardware and drums.

3) Wheel cylinders are not leaking.

STILL LOCKING UP AND PULSATING

The few mechanics looked at it are baffled.

HELP!
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Thursday, August 13th, 2009 AT 5:27 PM

6 Replies

Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
What kind of shoes are you using? If they are reman the odds are good that the curve is incorrect causing too much shoe contact in the drum, which causes lock up.
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Monday, August 24th, 2009 AT 12:19 PM
Tiny
EASTCOASTMC
  • MEMBER
  • 2 POSTS
Thanks for the reply.

The shoes are not reman.

This was happening prior to replacing shoes, hardware, drums, e-brake cables.

Eastcoastmc
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Monday, August 24th, 2009 AT 12:30 PM
Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
Both lock up at the same time?
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Monday, August 24th, 2009 AT 1:12 PM
Tiny
EASTCOASTMC
  • MEMBER
  • 2 POSTS
Yes, both sides lock up at the same time.
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Monday, August 24th, 2009 AT 2:59 PM
Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
Usually a pulsation in the rear indicates they are out of round (egg shaped). What brand of shoes/drums did you use? Have the drums been checked for being out of round? Are the primary and secondary shoes in the correct spots? Sorry for the basic questions, this is all stuff I would check first if I had the vehicle
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Monday, August 24th, 2009 AT 4:22 PM
Tiny
MJR346
  • MECHANIC
  • 132 POSTS
Are you having any other issues such as ABS light on or check engine light on?

If sensor on rear end has issues it will sometimes cause lock up as described. Another thing is Ford had some issues with shoes grabbing early in morning on dewey or rainy type mornings on those vehicles and was almost a characteristic.
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Monday, August 24th, 2009 AT 9:07 PM

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