Piston retainer for the O/D unit, I think. Not an unusual failure.... unfortunately.

 

Ok guys, so i put the 2000 pcm in the 99 that i put the 2000 trans in and it ran flawlessly all last week. On the way to work today, about 35 of 50 miles in coming from a stop it wasn't going into 4fh, shortly after noticing that the trans temp light came on. I eased it along after a few more stop lights, i got on it a little and it shifted into 4th, moments later the trans temp light went out. Ran normal the rest of the way to work.

Driving home i got about 20 miles, everything seemed ok, then from a stop at a light. Nothing!! No forward movement!! Just reving motor. If i let the R's deep to an idle it felt like it would hook\lock up, but any pedal at all and the R's race up no movement.

So wtf? Trans fluid is right.

Possible loose wire? Bad solenoid?

Getting no codes

??

 

Check fluid level in neutral, checking in park will give you an artificially high reading.

Under normal circumstances, low fluid would be my first suspect..... Could try unplugging the 8 pin connector, and see if the trans wants to work. It won't have any automatic function, or TCC or O/D, and you will have to shift manually.... See if it goes into the gear you tell it to, when you tell it to. See what happens.

 

Thanx HeyYou, i tried to check fluid when it first gave out and was hot but i wasn't level side to side. Passenger side was elevated slightly as i stopped at the end of the horseshoe on-ramp under the overpass partially up the curb. Didn't check when i got home and got it off the tow truck as it surely had cooled down by then. But after the truck was unhooked from the tow truck, i started it up and backed it up like it didn't have an issue at all.

Would Fluid overheating cause the slipping?
What is the 3 wire connector connected to, it sits below and in front of the 8 pin connector. Not the one farthest back but the one right up by the linkage??? One of the three wires going into the female end of the plug is just about frayed off. Related to slipping possibly??

 

I think that one is the neutral safety switch.....

Fluid overheating can indeed cause some interesting issues. Usually leads to premature wear, and parts failure....

 

ok heres the latest in the conundrum !

Started it up this am, a brisk 34 degrees out. started fine sounded normal. got in right away and tried shifting and moving. shift into drive normal, normal acceleration moved forward as it should reverse same. even powerbreaking it the trans was engaged and pushing the wheels. parked it, put it in neutral and left it to idle as i loaded the 99 trans into my gmc sierra to take to trans shop and have them rebuild it so the right trans and brain are in the right truck. once loaded iwent tothe dodge and checked the trans fluid, firgureing it was at operating temp by now. fluid was right on the money. but, there was def a noise coming from the trans now. got in shifted to drive, nothing! reverse nothing ! whatever it is its also causing the engine to lope whie idling. fluid too hot, electrical,or part failure???? ugh !! and it performed great for four days last week same route each day.

a coupke of details to add .... on the drive yesterday i do recall coming from a stop or at least an almost stop on surface streets that it shuddered a few times. like when you shift from 2 to 5th in a manual trans. but it caught up and resumed normal operation. the other thing and this was each day last week and the dead drive yesterday, the job site i parked at was a steep downhill grade facing down the whole day. there was no fluid leakage anywhere just the steep angle.

oh and as i pulled back up to my driveway just now because i forgot to grab a mask to have whe i get to the trans shop, low and behold a giant puddle of trans fluid in the driveway where the gmc was sitting as i loaded the dodge trans into it !! you know that saying "if it wasnt for bad luck ...." fortunatley it was just a hose clamp to the extra trans cooler that had come loose. hopefully the 3 blocks i drove it leaking didnt do any damage. not sure yet how much trans fluid i lost. topping it off and off to trans shop. FUN TIMES !!

 

Think I would still unplug the 8 pin when it has failed, and see if anything changes.

 

Copy that HeyYou. Will try when i get home.
What are the odds the filter gets clogged up enough to restrict fluid flow?? And since i removed the backflow valve it drains back thru the filter washing some of what was blocking the filter back into the pan. Could explain why its good after it sat all night and fails shortly thereafter just resting in neutral. ???

 

That IS possible...... Sure wouldn't hurt to change fluid/filter.... Pull the 8 pin plug and test that first though. No point going in there twice. (if it becomes necessary.)