Automatic transmission slipping and grinds

Tiny
HONDA HELP
  • MEMBER
  • 2002 HONDA ACCORD
  • 2.3L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 148,000 MILES
Un-maintained automatic transmission at times will not go into first gear then once warmed up slips mostly when I come to a complete stop. If I hold the accelerator at a stop as to put pressure on the transmission it takes off every time. I removed, cleaned and tested all solenoids and change fluid twice so far. I am now looking into replacing the 2 pressure switches? The only code I have seen is P0131. No flashing D light.
Thursday, September 19th, 2019 AT 7:52 AM

5 Replies

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Hi,

Slipping and grinding is the sign of a worn out transmission. If it was not maintained properly then most likely the seals internal to the unit have failed and are letting pressure by which causes the slipping. The grinding is due to pressure going to places it should not and causes gears to clash. You holding the accelerator up to put "pressure'" on the transmission is you keeping the pressure higher which is overcoming the cut/leaking seals.

Unfortunately, if it were me I would be tearing it apart and rebuilding it. More than likely you will find metal in the pan which would be another reason for a rebuild or replacement.

Let me know if you have questions. Thanks
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Thursday, September 19th, 2019 AT 5:07 PM
Tiny
HONDA HELP
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  • 3 POSTS
Thank you for your advise. I just bought this car as a beater from a teenager hoping it would be an easy inexpensive fix. I am leaning toward changing the fluid again along with the cooler line filter and the two pressure sensors and hope for the best. If this doesn't work then I will lean toward a used or re manufactured transmission. Thanks again for the information, any suggestions to my plan will be greatly appreciated.
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Thursday, September 19th, 2019 AT 11:11 PM
Tiny
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That is not a bad plan but unlikely to solve it. However, it is the right idea. If the fluid has metal then the filter is clogged causing pressure issue. Also, if there sensor are off then that is going to cause shift issues. Again, it is worth a try because IF you are correct then you just saved a lot of money (or postponed spending it).

Please let me know what happens as I am curious if that did the trick. Thanks
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Friday, September 20th, 2019 AT 6:11 PM
Tiny
HONDA HELP
  • MEMBER
  • 3 POSTS
Thank You for your reply. I can only hope for the best although I have to agree with you I think the transmission is on its last leg. I have been looking around for a used inexpensive low mileage transmission as well. Maybe it'll help for a while. Have a great weekend!
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Saturday, September 21st, 2019 AT 11:33 AM
Tiny
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  • MECHANIC
  • 18,907 POSTS
Thanks! Please let us know what the turn out is. Also, please start more posts if you have other questions. We are here to help. Thanks again.
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Saturday, September 21st, 2019 AT 7:17 PM

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