EFIDynoTuning Forum

I agree but it has only come up with 628 when it was not sending the LU ground signal from the ecu, Two times. And when it is sending the signal why will it function in 3rd gear but not 4th? I'll be doing more elect. testing tomorrow. LYK. This not sending the signal at all until I remove/replace the Moates makes me wonder...

I've pulled them a number of times as I got this thing on the road...nothing suspicious. When it quit doing trying to lock up in any gear a week or so ago I cleaned the J3 contacts and it went back to working in 2nd and 3rd. I've even put a DVM across Pin 53 to ground. Ign. on full Vpower. In LU, about 10.5V which would indicate the resistance of the TCC solenoid. Those values also correspond to the indications of slip ratio and BCSDC during lock and unlock.

Okay it is showing a 628 (converter clutch excessive slippage) It did this the last time it refused to show a LU signal but that code went away when I cleaned the J3 and 3rd LU started working again. Tomorrow I'll check the TCC/Pin 53 circuit with the VOM and make sure it's good. Thanks again, LYK.

Is there any chance this could be due to a PCM fault? Doesn't seem likely since 3rd gear LU works as it should and all the electrical checks out.

35.5 Lock, 34.0 unlock. Rel TP is 52 Lock, 124 unlock.

Well, I'm sorry to report...no joy. It still works as it should in 3rd gear but locks up then unlocks after a few seconds in 4th.

Soon as it comes back from the pipe shop I'll add a couple of recent fuel changes and let you know. Once again I can't say thanks enough...but I'll try.

I'll load a couple of fuel changes into what you sent and let you know when it comes back from the pipe shop later this week.
Thank you very much again. Other than the LU issue I'm extremely happy with the trans swap and with your base tune. I'll let you know.

Bin attached.

Bin file attached, thank you Michael.

Did I do this right?

Rung out all the electrical connections and found nothing wrong to cause no TC lockup. Finally removed Moates and cleaned the J3 connector. Re-installed Moates and now it works as before...good lockup in 3rd, lockup followed by drop out after about five seconds.
Per Decipha recommendation I lowered FN_SRKLK from .930 as it was in the download to .742 (20%) and it still behaves the same way.
In lockup BSCDC goes to 1.0000, SPD_RATIO SLP % is .001 - 0 in 3rd and .026 - .030 in 4th. I'm sure I don't fully understand what these values mean but it appears to me that my actual slip percentages are well below the original .930 in SRKLK which should be 7% in my mind.
Also...what exactly is BSCDC telling me. Decipha recommendation is to set at 64 which I have done.
Will it hurt anything to drive long distance with no 4th gear lockup. I wouldn't think so...other than MPG...but I gotta ask. This car IS making a long trip in May and I WILL reinstall the AOD if necessary.

Thanks again for any advice or ideas.