[pscianna]

I went through all of the external electrical checks that I could do without the ability to excercise the shift solenoids via the PCM. I could not find anything at fault.

I put it back together and it shifts like new. Now I cannot break it again. It appears to have been some bad connection that I mended at least for the moment by disconnecting and reconnecting the various transmission harness connectors for my tests.

It worries me that it will happen again when I am far from home.

If anyone has had a similar experience I would appreciate hearing about it.

Thanks,
Paolo


ORIGINAL POST
I have shifting from 1 to 1 lockup to 2 to 2 lockup but nothing more. I retrieved PO782 fault code and I will do a thorough electrical wiring and connector check this weekend. It seems from examining the shift solenoid A and B truth tables that SSA is "on" all the time. I am limited at checking PCM output without breakout boxes.

The main question is for those who have experience with addressing PO782 fault code of no 2 to 3 shift.

HAVE YOU FOUND A SINGLE MOST COMMON FAILURE IN REPAIRING THIS PROBLEM?

Thanks, Paolo

 

[arisley]

Re: Opinions on common cause of no 2 to 3 shift in 4R100 automagic needed.

Is that the correct shift sequence. I was under the impression that it was 1-2-3-LU-OD.

 

[pscianna]

Re: Opinions on common cause of no 2 to 3 shift in 4R100 automagic needed.

Yes it is if you are making enough torque demand. My rig weighs 8000 plus at a minimum and I am always towing something up to 20,000 lbs plus combined weight. With my torque converter lockup indicator and my ears it is easy to identify the shift sequence.

The shift sequence you describe is exacactly how mine shifts at low torque demand.

 

[pscianna]

Re: Opinions on common cause of no 2 to 3 shift in 4R100 automagic needed.

To the top