1994 Oldsmobile Ciera Goes out of OD/4th gear

Tiny
JPCHARLTON
  • MEMBER
  • 1994 OLDSMOBILE CIERA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 327,000 MILES
Two symptoms: 1) About 3 weeks ago it started to act up. When going up a slight grade the engine would speed-up and slow-down at about 1 second interval. I think that it was shifting from 4th gear to 3rd gear, back and forth. 2) Yesterday on the freeway on a long trip it seemed like the engine was running fast. I dropped the transmission from OD to D and no change in engine sound. I was consuming more gas than normal. I stopped for gas and tested the OD to D again. This time it worked. Later in the trip the engine was running fast again and the OD to D test failed. I need help in getting this resolved, answered and someone to walk me through the fix. Thanks
Wednesday, May 6th, 2009 AT 2:45 PM

6 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Hi
Transmission is slipping due to worn clutches and/or seals. Check fluid level and color is it pink/red or brown to black? You may want to take to a trans repair shop for diagnosis and est. Of repair.
Sorry I have no silver bullet
Let me know
Thanks for donate
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Thursday, May 7th, 2009 AT 10:16 AM
Tiny
JPCHARLTON
  • MEMBER
  • 3 POSTS
It is my understanding that the problem is not in the transmission itself, but in the control of it. Something to do with the control. Perhaps a sensor that is not receiving the right data or some other intermittant problem. Please review my original symptoms and get back to me. Thanks, John
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Thursday, May 7th, 2009 AT 11:57 AM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Yes I have and the symptoms do not indicate soleniod fault. You can have the trans checked for function and pressure tests. What color is the fluid?
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Thursday, May 7th, 2009 AT 5:52 PM
Tiny
JPCHARLTON
  • MEMBER
  • 3 POSTS
Sorry I didn't include the color of trans fluid, it is pink, but seems to have black particles on some areas of the dip stick. I will follow up with a checkup, thanks.
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Thursday, May 7th, 2009 AT 7:09 PM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Black specks indicate clutch material. When you get test results post and will advise.
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Friday, May 8th, 2009 AT 3:56 PM
Tiny
MIKE21091
  • MEMBER
  • 2 POSTS
Mine does the same thing, for some reason if you can keep the temp gauge at or under the mark between 100 and 220 you wont loose o/d, I think its a pressure problem when the tranny fluid is hot and thin, took me a while to figure it out
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Tuesday, December 29th, 2009 AT 8:40 AM

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