2001 Durango 4X4 4.7

So I was on the highway yesterday and while driving my truck suddenly downshifted and I was nearly thrown from my seat! it kept behaving badly and eventually the MIL came on. I was able to make it home, but I had to turn the OD off. It only seems to do this in overdrive, and it doesn't feel like slipping, more of an erratic shifting issue, like it can't decide what to engage when its supposed to be engaging overdrive. I got a P0700 code, but don't know what to make of it, as its not too helpful of a code to be honest...

 

Get it scanned with a better code reader. Generic readers often have problems reading transmission codes.

 

Well, it is going to a transmission shop tomorrow morning (I wanted them to look at it today, oh well...) and I'll see what they say. I had done the Jeep CG TCM swap, and had the original TCM the truck came with, so I switched those out just to see, so I can say for certain its not the TCM... Because of the way it just seems to almost flutter between gears, I truly think the issue is in the valve body, my honest opinion is the solenoid pack, but we will find out. Unfortunately neither me nor Dad have any desire to deal with this, so something that always promised to be inconvenient now also promises to be expensive... Oh well!

Menagerie
Of
Parts
And
Repairs! I've thought about making this into a bumper sticker...

 

I was going to post that earlier, just take it to a shop. A trans doesn't last forever, and is a huge job for a regular home mechanic. I was born and raised in Detroit, have done about every repair on many vehicles over the years, but I decided long ago to leave an auto trans to a decent shop. I know how they work, whats involved in a rebuild, just choose not to bother with it myself. In well over 50 years of wrenching, I've only needed three trips to a trans shop.