Honda Accord (1990 - 2002) Includes 1997 - 1999 Acura CL

Rpm going to 3500 when shifting from 2nd to 3rd

 
Old 11-26-2018, 08:39 PM
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Default Rpm going to 3500 when shifting from 2nd to 3rd

Hi there,

Honda Accord DX 1990.

I felt something funny today when driving, the rpm went over 3300 while changing gears ( 2nd to 3rd) .

The S-light never went off, neither the check engine light. When I checked for check engine- transmission codes, the S-light gives code 1,2,7,8.

I replaced the transmission fluid, and cleaned the solenoids ( they both clicked when I tested them) I took the car for a long drive. It did it at least once. But the S-light is not giving any codes. Tomorrow I will be putting my car in storage until April. Any advice for when I take it out next year?
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Old 12-01-2018, 08:41 AM
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Default Re: Rpm going to 3500 when shifting from 2nd to 3rd

Cheers,

Any word of advice?

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Old 12-01-2018, 04:25 PM
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Default Re: Rpm going to 3500 when shifting from 2nd to 3rd

sounds like clutch pack slipping, how many miles?
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Old 12-03-2018, 02:52 PM
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Default Re: Rpm going to 3500 when shifting from 2nd to 3rd

193 000 miles. It is automatic. By the way, I replaced transmission fluid every 20-25000 miles. I have had it for 18 years and always taken care of. I had the issue of the leaky capacitor in the TCU back in 2007 and I replaced the ECU/TCU unit.

Last edited by greenquark; 12-03-2018 at 03:10 PM.
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Old 12-04-2018, 05:23 PM
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Default Re: Rpm going to 3500 when shifting from 2nd to 3rd

I believe the phenomenon you describe is called shift flare. According the Honda Service Manual (HSM), the various causes--in your case, shift flare between 2nd and 3rd--are mostly due to a fault inside the transmission--and a harbinger of imminent hit to your repair reserve fund. Dire eventualities aside, the HSM lists testing the shift control solenoid valve C and the 3rd clutch pressure switch as potential sources of the problem--"testing" means removing the solenoids and checking their resistance (which is never the problem), and blasting the screens with a shot of Brakleen. I'd be handy to check the exact pre-ODBII definition of the code you got.

If your comfortable wrenching on your car, I suggest you follow the t-shooting procedure for those two components. Both are mounted on the outside of the transmission case and only somewhat painful to access. If either or both test bad--which for the your purposes may actually be a good thing, relatively speaking--you might have luck finding a known-good used replacement online (much less expensive than purchasing new). Else, the fault may lay with the 2nd, 3rd (or both) clutch packs, debris clogging some internal orifice, clogged internal filter, and/or bad seals--iow, the aggregate result of a seemingly poor-quality rebuild.

Last edited by lothian; 06-09-2019 at 04:30 AM.
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Old 12-10-2018, 02:40 AM
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Default Re: Rpm going to 3500 when shifting from 2nd to 3rd

Thank you very much! CAr is already in storage. Once I take it out in April, I will follow your advice!
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Old 12-12-2018, 11:50 PM
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Default Re: Rpm going to 3500 when shifting from 2nd to 3rd

No such thing as a pressure switch on the 90-97 H4A transmissions.

1. Solenoid Valve A Lockup Control
2. Solenoid Valve B Lockup Control
7. Solenoid Valve A Shift Control
8. Solenoid Valve B Shift Control

That's all four shift solenoids. Recheck your connections to your solenoids, verify the wire harness is not damaged.
Verify the main grounds are clean and tight.
Verify the connection to the TCU is clean and no damaged pins.
Open the TCU and verify the caps/resistors are not damaged.

Any recent work done to the car?
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Old 12-17-2018, 04:49 AM
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Default Re: Rpm going to 3500 when shifting from 2nd to 3rd

I store my baby during the winter. Once I take it out in April, I will follow your recommendation!
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Old 06-08-2019, 09:46 PM
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Default Re: Rpm going to 3500 when shifting from 2nd to 3rd

Originally Posted by greenquark View Post
I store my baby during the winter. Once I take it out in April, I will follow your recommendation!

Hello there,

I replaced the ECU/TCU and the problem went away. But Once in a while rpm goes up when I accelerate. The TCU is not giving me any error ( no codes)

The first video is the AT shifting ( constant footing on the gas). This is the throttle cable. CAr was off. I know it should have some slack...but this much?



second video is the throttle cable. CAr was off. I know it should have some slack...but this much?



Any help would be appreciated

Cheers


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Old 06-09-2019, 04:47 AM
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Default Re: Rpm going to 3500 when shifting from 2nd to 3rd

Still looks like shift flare to me; I doubt swapping the TCU did anything. Remove the aforementioned solenoids and clean the screens. Re-attach, then test drive. Shift behavior will likely normalize (if my presumption is correct). You may notice intermittent shift flare again. Repeat the onerous process of cleaning the screens. Note: Be prepared to purchase new solenoid gaskets--those aged parts don't hold up well to jostling.

Regarding your throttle cable non-sequitur: If petal travel is, in your opinion, excessive (no resistance btwn point-of-petal-contact to point-of-throttle-actuation) adjust the cable to your liking.

Purchase a Honda Service Manual. Buy a code reader. Start saving for a replacement transmission.

Last edited by lothian; 06-10-2019 at 12:41 PM.
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Old 06-10-2019, 10:12 AM
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Default Re: Rpm going to 3500 when shifting from 2nd to 3rd

Had this issue. Eventually the Trans will slip (clutch pack).
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Old 06-12-2019, 01:46 AM
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Default Re: Rpm going to 3500 when shifting from 2nd to 3rd

Hi there,

The video I showed with the shifting, I consider that "normal". That is the way my car has been shifting since I got it back in 2001. I will follow the procedure this weekend.I am pretty sure this is the procedure you are referring to:
.

I will report back.
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Old 06-12-2019, 01:48 PM
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Default Re: Rpm going to 3500 when shifting from 2nd to 3rd

Verify the throttle valve cable is properly adjusted. There should be no tension and no slack in the cable.
That last video is of the M6HA found in 98-02 Accords, 97-01 Preludes, and 98 Ody. That first set of solenoids are the linear pair which takes place of the TV cable.
Second video, take the slack out of the pedal to throttle, slack here causes delay in power application and limits TB from fully opening when the pedal is floored.
First video, there is a flare from 2-3.
If you are noting a shift flare, verify on a flat level surface that your fluid is full after placing the transmission in every gear for a few seconds(til engagement) then place it back in Park, pull dipstick, wipre, reinsert and pull it out to verify fill level. I live in a hilly area and prefer to keep the fluid towards the top of the hash mark as this keeps the sump properly covered under a few off camber turns.
Engine running condition greatly affects shifting and shift quality.
If the TPS, thermo, MAP, Baro, or coil are cutting out or have erratic inputs these will greatly affect how the transmission operates.
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Old 06-12-2019, 06:13 PM
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Default Re: Rpm going to 3500 when shifting from 2nd to 3rd

Hi there,

I live in a hilly place too! I will verify the fluid. I changed it recently though. Now, what is the TPS, thermo, MAP, Baro, coil? I am cleaning the whole engine bay little by little. I have never done it. The throttle body is really dirty, in fact, everything is really dirty. I will report back
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Old 06-13-2019, 04:56 AM
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Default Re: Rpm going to 3500 when shifting from 2nd to 3rd

Should the trans fluid level be checked with the motor running or turned off. I ask because I have a cooler mounted in front of the radiator and I wonder if between the time I cut the motor off and I check the fluid level if drain back from the cooler lines might show I have more fluid in the system that I really do. And need.
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