It only happens cold and just one occurrence each cold/cool start. I can warm the truck up for 5 seconds or 5 minutes and the result is the same.

1-2 is fine but coasting through the subdivision it will hang in 2nd until I let my foot off the throttle completely then all is normal until the next cold start or cool start (sitting long enough for the trans temp gauge to bottom).

It’s done it since I’ve owned the truck, which is not long. I changed fluid with Mercon LV about 900-1000 miles ago and no change. I’ve cleared KAM with no change.

The truck is an early 04, stock except for intake and exhaust. No tune.

I’m guessing something in the valve body, like a bad solenoid or gasket leak or dummy plug leak.

Anyone experience anything similar or have any insight?

thanks,
Bob

 

Are there any codes stored?

 

Forscan lite does not show any trans codes. I’ll check again later this morning right when it happens.



Bob

 

The p132B-60 could be something



Bob

 

Things have progressed on the positive and negative side.

Positive: The p0132b issues have been resolved with new turbo, icp and ipr.

Negative: The shifting issues have progressed. The 2-3 shift delay still occurs at first start but now also on some warm starts and some long idle waits like stop lights or construction delays.

I’m also seeing (thanks to forscan) a 6-4-6 cycle under light to no acceleration. It will usually cycle a couple times over 10-15 seconds.

What I’ve done:
1) I bought a Forscan recommended OBD2 adapter.
2) Replaced batteries and reworked all of the grounds.
3) Took the truck to a diesel shop and a trans shop and neither saw any codes.

The transmission shop recommended a complete replacement but I’m not convinced. Other than bouts of confused shifting (delayed or out of sequence) the shifts feel great, no harshness or flares.

Any thoughts? I don’t have a problem replacing the entire transmission it just seems extreme when it shift great most of the time.

I’ve saved a bunch of logs from forscan that I’ll go through and attach later this evening.



thanks,
Bob

 

You need to determine if the PCM is commanding these shifts or is the trans doing it on it's own.

 

The attached CVS from yesterday @ 9:07:22 has both the delay and the 6-4-6 cycles with all the pids that made sense to me. Some PCM and some TCM.

I pulled out of a parking lot onto the highway at the 41259ms mark.

Mark, how do I go about determining if the shifts are PCM or TCM commanded?

Thanks,
Bob

 

Ford has a TSB or message out on 2-3 upshifts and that "six-speed" 5R100 --if intermittent, the "clunk" is normal play/backlash in the drive train. When it's cold it shifts 1-2-3-4-6, when it warms up it shifts 1-2-3-5-6. Off the top of my head I think you might have an intermediate clutch issue since it gets going at 3rd Gear, maybe Solenoid C or its pressure switch, but the absence of codes isn't helping us -- I can't believe that shop said you need a whole new tranny. WTFO

I didn't look at your data yet (is that from Flight Recorder?) -- will when I get to my other computer with Excel on it.

 

It’s from FORScan Lite on an iPhone

 

That's easy. All shifts are commanded by the TCM, not the PCM.

What I was asking is if the shifts are happening without the TCM commanding them. In other words, does the TCM show GR_CM (commanded gear) change before the shift happens?

 

Ah, I misunderstood. I’m pretty sure the gear commanded and shift happens at the same time but I’ll confirm that and report back.

Bob

 

They can't happen at the same time. One HAS to come before the other.

 

OP --- I just took a peek at your data and don't see anything out of whack vis a vis line pressure and pressures expected at the respective shift points. Not sure how Forscan handles the data so I'd have more confidence in IDS or instrumenting the tranny myself.

I'm still thinking intermediate clutch related and / or normal drive train noise as Ford pointed out in its TSB / messages. If you do go in there and ohm check or swap solenoids I'd also replace the internal harness and temp sensor as precautionaries. These trannys are thirsty suckers and like the 6.4L pans and filters as well ---food for thought.

 

Thanks for taking a look at the data. I’ll definitely replace tft and harness while I’m in there and since I tow a fair bit I’ve been thinking about the 6.4 pan and filter also.

I did catch a delayed 2-3 shift theat actually showed that 3rd was commanded for a second or so and then the command went back to 2 when the shift didn’t occur. I let off the throttle and it shifted to 6 then under light acceleration (still in the subdivision) it went to 3 and shifted normal after that. I didn’t get the log though.

Thanks,
Bob