98 Windstar No Problems Till 120000 Started Giving Big Sounds

[L98Driver]

I would check and see if you could get a Marshall Remanufactured Engine for your car if your getting anew motor,they only reuse the head, block castings, and yoru rods and crank, everything else is new. ATK, and Recon, i wouldn't go with. i've heard ATK, and Recon remanufacture their valve springs and taht Marshall just has better craftsmanship

[percyha]

I RECALL MY VAN B4 THE ENGINE PROBLEMS STARTED,... ONE DAY HAD STUCK GEAR OR SOMETHING LIKE MY MISTAKE THAT I PUT THE LEVER INBETWEEN D AND D2 FOR SOME TIME WHEN MY RPM STARTED JUMPING TO 3000....4000....4200 AND SO ON AND CEL, OIL PRESSURE AND BATTERY LIGHTS CAME UP AND VAN STOPPED. ON CHECKING IT GAVE
P0302 (MISFIRE DETECTED IN CYLENDER 2)
AND PO761 (SHIFT SOLINOID C. CKT. PERFORMANCE OR STUCK OFF)
AND NOW AFTER REBUILDING MOTOR GIVES P0743 (torque Converter Clutch Circuit Electrical)
CAN SOME ONE TELL WHERE DOES THESE SOLENOIDS REST and which ones to be replaced?
HOPE I GET MORE INFORMATION AND HELP ON MY CODES SO I CAN TAKE RIGHT STEP AHEAD.
I am not driving the van as I am scared if I may harm the tranny and end up shelling $$$s

Some nice guy on another forum advised:
It is indicating an electrical fault for the Torque converter clutch circuit and is a hard fault as the MIL stays on. More than likely it is a wiring problem from swapping the engine out and putting stress and stretching the wire harness during engine r&r. It will not allow TCC operation and cause lower fuel mileage to start.

Also If it is a wiring problem he needs to find it and fix it or run an overlay for that circuit from the pcm to the trans if that is all that is on the circuit. It wasn’t there before the engine install.

It should not cost you anything as I said, it did not have the problem before and if they don’t fix it for you for free I would question the ability of the shop in the first place doing the work. Find and repair the problem, don’t just throw a harness at it.

My queries r:
Is it repairable or I had to bear with it and keep driving.
Can the mechanic who swapped the motor open and close few connectors and release the tension in wires.... will it help
Or Is it possible to swap the wiring harness from my old motor now the core to the installed motor....is it doable and can it solve the problem?
or anyone can suggest some easy and economical way b4 taking a expensive route...and how expensive can that be....
And where to take it and which repair shops do have expertise in such problem solving?

Will I need the core of the motor to swap any thing from there or I can return the core as it has nothing to do any more.

My mechanic is a independent one and swapped the motor at his friends workshop. Though he works at some ford dealer. He was very nice but after knowing the problem not responding any more.... And I am left midway as I don’t know much more than what I read from the forum.
I know I have many questions but I am stuck and want help to be able to use my van.
Thanks
percy

[percyha]

My mechanic responded and told me that this is transmission issue which needs opening up of the transmission to replace TCC switch or look into further....may take 4 to 5 hrs...but as it is not his expertise.
Also there is no harm driving it with this code on as only thing this switch does is when in 4th gear one reaches desired driving speed the TCC releases the clutch and rpm reduces by couple hundred. if the replacement is not undertaken then the van may give a little less milage per gallon.
Does it make sense?
Will appreciate a confirming opinion in favour of this argument.
thanks

[wiswind]

P0761 is shift solenoid #3 (SS3) performance.
Do you still have this code?
Another thing I come up with is that this is a SS3 Electrical malfunction. Things to check would be the electrical connection at the transaxle....look for bent, broken, or pins that are pushed back into the connector.....look on both the cable and transmission connections.

P0743 is Torque Converter Clutch (TCC) electrical system malfunction.
Look for the same issues with the connectors as mentioned above. Also.....can check PCM connector as well. Look over the wiring harness(s) for any signs of damage.
I would do this before opening up the transaxle.

Both codes you list indicate that the electrical system is seeing a problem....which could be a broken electrical connection, or shorted electrical connection. Could it be inside the transaxle?...yes.....such as the solonoid it's self being shorted.....or open. But start with the easiest.....and most likely first......and you know that the wiring harnesses were moved about......disconnected.....reconnected in the engine swap process.

P0741 is TCC MECHANICAL sytem malfunction.

[percyha]

P0761 is not showing now.
which harness is to be checked , the one on motor and the connector from it going to transmission?
or Is there any separate harness for transmission? My mechanic said he did not touch transmission haness as that is inside the trans and he is sure he did not pull or stressed the motor harness.
Today I disconnected the battery +ve for few minutes and reconnected ...it still shows P0743 as PD...(pending) but the engine light did not come up after driving for 1 mile in subdivision.....Is it possible it may not come back and the pending code also vanishes after 30 or 40 cycles of no problem in engine drive start and stop...i read something like this somewhere.
I just checked the motor harness seems fine in tact not eroded or exposed any where.