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Old 08-17-2011, 11:12 AM
Coil99 Coil99 is offline
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Transmission - P0780 Code

My mother has a 2002 EX-L V6 sedan. It has approximately 54,000mi on it.

It is my understanding that the overwhelming majority (if not all) of the routine maintenance has been done at the Honda dealer where it was bought. I believe this includes the scheduled services - including a transmission service - but I am waiting to see all of my mother's paperwork to confirm this.

After getting the flashing "D4" light and the constant "check engine" light, she brought it to the dealer. The dealer said the P0780 code was thrown, and stated that a remanufactured transmission is needed. The total cost of the job is about $5,000.

Does $5,000 sound a bit high?

After doing a search on DA.net, I found a post stating that replacing a few solenoids might be a starting point. [The quote: "...If the P0780 code was the only one found, the Honda repair manual says to replace the shift solenoid valve A and the pressure control solenoids A & B..."]

Is it worth it to have the solenoids replaced? And/or to try anything else short of a replacement tranny? Or would it just be wasted money and a "band aid" fix?

The transmission has been shifting a bit funky, but nothing terrible. Any thoughts as to how long it might be before the tranny lets go?

Any suggestions are appreciated.
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Old 08-17-2011, 11:24 AM
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SatinSilver SatinSilver is offline
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Usually, the flashing D = certain Death. In the other cases where misc parts have been replaced it was flaring btwn gears(no codes or flashing D) and/or shifting slowly from one gear to the next.

The price does seem very high. I would shop indy trans repair places. Usually, they charge around $1800-2500 for a rebuild with warranty. Esp when times are tough. If you or your mom or other family member has AAA towing to the repair shops is usually free.

Check www.bbb.org to check the shop out or refer to Angies list for some good shops.
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Old 08-19-2011, 08:28 AM
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The P0780 code is listed as "Problem in Shift Control System"

So, it could be a solenoid as it sounds most similar to my broken solenoid issue from a few months back.

I would say to go to a junk yard and find solenoids for your mother's car and go from there. The worst that can happen here is that the junked ones also don't work and the issue persists or acts slightly different. Best case scenario is that everything will work again.

Yes, $5,000 is much too high even for a rebuilt trans from a dealership. The highest price I've seen for a rebuilt trans from a dealer has been $3,600. And as SatinSilver above me mentioned, a transmission shop will charge somewhere between $1,800 - $2,500 to have your mother's transmission rebuilt.
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Old 09-06-2011, 07:45 AM
Coil99 Coil99 is offline
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Arrow Now you know the rest of the story...

My mother was able to get "Honda goodwill," so she paid for half of the replacement transmission (approx $2,600). It comes with a 3yr/36,000mi warranty from Honda.


Many thanks to Commonwealth Honda (in Lawrence, Mass) for standing by the product they sold and serviced.


I called a few dealers in/around Boston and a few down here, and they were all in the $4,000 to $5,000 range (give or take a few hundred) for a replacement tranny.


We'll never know if replacing the solenoids would have helped, or how long it would have gone before it puked its guts. Given the facts, sticking with the dealer was the safest way to go.


Thanks to Satin and CDs for their thoughts.
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Old 09-06-2011, 04:36 PM
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Glad you got it sorted out!
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