Auto trans downshifts

Tiny
REDWINGS36
  • MEMBER
  • 1995 SATURN SL2
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 96,000 MILES
When vehicle warms up and goes through the shifting sequence the tranny will downshift at about 40 mph to a lower gear and the rpm's hit around 4000 or so. The vehicle will not upshift unless you stop the car and start going again. Have changed fluid and filter with no success to the shifting problem. No loud or unusual noises before this happens also no rough shifting just seems to downshift and stick in the lower gear. At my wits end please share any info as I am lost. Thanks oh I have turned a few wrenches in my time so not afraid to get down and dirty
Monday, February 8th, 2010 AT 12:14 AM

7 Replies

Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
First of all thank u so much for ur donation it really helps to keep this site going and helping people with there cars. First of all u need to get the car scanned for transmission codes so we have a starting point. Have the codes checked and bring them back to me so I can better help u.
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Monday, February 8th, 2010 AT 10:55 AM
Tiny
REDWINGS36
  • MEMBER
  • 3 POSTS
Called auto zone he told me the vehicle is not equiped to test with obd tester. Now how do I procede?
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Monday, February 8th, 2010 AT 7:47 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
To get the check engine codes to flash in your dash panel, use a jumper wire or a paper clip and connect terminals A and B of the diagnostic connector. Turn your ignition key on with engine off and the codes should start to blink. All codes should start with code 12 which is one long flash followed by 2 short flashes. This code 12 means the diagnostic system is normal and will repeat itself continuously if there are no trouble codes. Otherwise, code 12 will flash 3 times before flashing the fault codes. Iam not sure if u can get transmission codes this way but give it try and let me know what codes u get.
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+1
Monday, February 8th, 2010 AT 8:23 PM
Tiny
REDWINGS36
  • MEMBER
  • 3 POSTS
Car is snowed under foot surgery monday results of test on saturn in one week please allow some time thanks
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Sunday, February 28th, 2010 AT 8:15 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
No problem u take ur Time and I wish u a speedy recovery on ur surgery.
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Sunday, February 28th, 2010 AT 9:08 PM
Tiny
NIXER
  • MEMBER
  • 1 POST
I have this same exact problem. Any link to the gear solenoid?
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Saturday, February 2nd, 2019 AT 6:36 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
Yes, here are the location of the shift solenoids and how to change them. Check out the diagrams (below). Please let us know if you need anything else to get the problem fixed.
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Monday, February 4th, 2019 AT 2:50 PM

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