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Why does my truck shift hard and down shift when I come to a stop?

Tiny
MRSBRYANT87
  • MEMBER
  • 1993 FORD F-150
  • 131,000 MILES
Recently when I come to a stop if I hit my brakes hard when I take off my transmission will shift hard and down shift on its on. If I cut the truck off and cut it back on it will shift good its like it resets it do you know why?
Wednesday, February 15th, 2012 AT 1:10 AM

5 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Sounds like the valve body. Have a trans shop road test it and confirm.

Roy
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Wednesday, February 15th, 2012 AT 1:18 AM
Tiny
MRSBRYANT87
  • MEMBER
  • 3 POSTS
Do you know how much that would cost? Its crazy cause the whole day it will shift good but when I hit the brakes hard when I come to a stop thats when it starts acting up its like its not gettin the fluid or something. Is there anything else you think it could be the transmission shop told me it was the vss and I replaced it and its still doing it. Thanks so much for the help.
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Wednesday, February 15th, 2012 AT 1:38 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Vss never does that. A valve could be sticking and causing this condition. You could try a valve body modifier which is an additive. Otherwise, you need to visit a shop for repairs.

Roy
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Wednesday, February 15th, 2012 AT 1:54 AM
Tiny
MRSBRYANT87
  • MEMBER
  • 3 POSTS
Ok thanks very much where would they sale an additive?
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Wednesday, February 15th, 2012 AT 2:10 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Any parts store

Roy
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Wednesday, February 15th, 2012 AT 2:13 AM

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