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Overdrive not working

Tiny
SEAN P JORDAN
  • MEMBER
  • 2001 CHEVROLET LUMINA
  • V6
  • 2WD
  • AUTOMATIC
  • 200,000 MILES
Well I kind of have to problems but my transmission, the main problem is that I do not have overdrive. I have already change the fluid and filter.
Sunday, June 10th, 2018 AT 10:09 AM

3 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good afternoon.

What condition was the fluid when you changed it?

Is there any codes set in the system?

Do you mean fourth gear or converter lock up?

Roy

https://www.2carpros.com/articles/automatic-transmission-problems
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Sunday, June 10th, 2018 AT 12:54 PM
Tiny
SEAN P JORDAN
  • MEMBER
  • 1 POST
I do not have overdrive or fourth gear.
At seventy mph rpm is 3,000. Fluid was nasty but new filter a bottle of Lucas and high millage fluid did not change still no fourth gear. I was told could possibly be a sensor or switch or something external that plugs in.
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Sunday, June 10th, 2018 AT 2:25 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,904 POSTS
Hello,

This sounds like an input shaft speed sensor is going out but we should run the cdoes first.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Here is the location of the sensor (below) Please let us know what you find.

Cheers, Ken
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Tuesday, June 12th, 2018 AT 12:20 PM

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