Issues after transmission replacement 01 Accord

cjoste · Aug 17, 2025

OK so I'm working on a 2001 honda accord v6 4spd automatic. The owner bought a used transmission, I assumed it was rebuilt now I'm thinking maybe it's junk. The install went well no issues at all, started right up idle is perfect, I let it warm to operating temp tried to throttle up and hold rpm at 3000 but as soon as I touched the peddle idle surges up and down making it impossible to hold the rmp also if I touched the steering wheel at all it would die right away after way too many tries checked all connections and vacuum lines oh yeah no codes either. Then I went through all the gears make sure the fluid was at correct level no change. Then I tried to drive it. Goes into gear d4 starts rolling and if you touched the peddle real slow it will go to about 10mph then power drops if you work the throttle like a mad man it will stay running barley I drove around with flashers on trying different gears once in awhile it would take off and shift but would just loose power rpm would drop to hit the throttle and no response hit it a few more times then engine comes back but still doing the same shit. Got home and started over disconnected battery while waiting for the brain drain I checked all the connections again. Tried the relearn again same thing tried driving again same results. I kinda felt like I was making a little progress at one point I started in 1st and manually shifted 2nd and d3 got up to about 35mph tried d4 started choking out tried it again but when I shifted to 2nd there was nothing just not there tried d3 went into gear but no power. I Repeated this process a few times At this point I was doing the same thing over and over and praying for a different result. So then I decided to check all the shift solenoids omhs 15-25 is what I think they should be at they are on the lower end but within range put voltage to them they all clicked valve A and B are good also 5 omhs and operating. So that's where I'm at I have no clue what is wrong or what to do about it. It's been four days of this as you can imagine a lot more has happened over those days different Scenarios, but the result was ultimately the same. The place the transmission came from is closed until Monday. I'm still hoping that there's just some stupid little thing that I have missed. Please helplease help thank you

Cg1v6 · Aug 18, 2025

Sounds super spheritic. No D4 Flashing? im kinda at a loss with that one too. but here maybe try looking into these.

https://cardiagn.com/1998-02-accord-automatic-transmission-v6/

This place is pretty good for diag shit. Trans arnt my strong suite. But solenoids testing in range, Youve made a good start. Possibly whoever rebuild it **** something up? But i cant personally dont know enoug about these trans.