Transmission Kicks into passing gear on its own

Tiny
EDDIE JIMENEZ SR.
  • MEMBER
  • 1992 BUICK ROADMASTER
  • 5.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 289,998 MILES
My transmission gets all gears but I have noticed that when on the freeway it has been kicking itself into passing gear. Can you please let me know what is wrong with it?
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Wednesday, March 14th, 2018 AT 7:05 AM

5 Replies

Tiny
ASEMASTER6371
  • EXPERT
Good morning.

There is a throttle cable that controls shifting points up nd down. It is possible it is out of adjustment.

It is on the intake manifold behind the carburetor driver side. The cable moves back and forth and changes throttle pressure which regulates shifting. By moving the cable back and forth it will change shift point and quality.

Roy
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Wednesday, March 14th, 2018 AT 7:23 AM
Tiny
EDDIE JIMENEZ SR.
  • MEMBER
Good morning.

Okay, now why would that cable suddenly get out of adjustment?
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Wednesday, March 14th, 2018 AT 7:26 AM
Tiny
ASEMASTER6371
  • EXPERT
Could be wear from age, valve body, cable coming loose down at the transmission, cable itself.

Do a visual inspection first to be sure nothing is loose or broken.

How long since the oil/filter has been changed in the transmission?

Roy
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Wednesday, March 14th, 2018 AT 7:35 AM
Tiny
EDDIE JIMENEZ SR.
  • MEMBER
About a month ago.
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Wednesday, March 14th, 2018 AT 7:37 AM
Tiny
ASEMASTER6371
  • EXPERT
Okay, I would check all the externals and try moving the cable and see if it helps.

Roy
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Wednesday, March 14th, 2018 AT 7:46 AM

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