I have a 1993 idi uesyerday it was shifting fine and today it would band into gear and drop from 2nd to 1st or just rev high in first. I am wondering if it would be the actuator valve or maybe the wrong Trans fluid? I had the fluid changed last night.

 

how long have you had the truck? how many miles are on it? is the trans original?
prior to the fluid change,was the trans shifting just fine? did you check the level?
can you find out what type of trans fluid was used and if the filter was also changed?
do you see the over drive light flashing? have you pulled any codes yet?

 

There is 147 on the truck. Before the Trans fluid it did shift fine and I do not think the filter was changed. and yes the od light is flashing. He said he used fluid that was good for dex or merc applications.

 

ah your in luck with the OD light flashing. that should help ya get pointed in the right direction.that's your friend.
though when its flashing and your getting crap late/firm shifts and she sometimes wont find all her gears (depending on what is wrong) it sure doesn't seems like that flashing light is your friend at the time.

fluid level ok? maybe it got a bit overfull and the solenoid pack plug seal down under isn't in the best of shape and trans fluid came up through and is shorting out the plug.
you can inspect it to make sure for starters.it's the plug on the pass side behind a little heat shield.
anything else also happen at the same time? like spedo or tach stop working or reading smooth by any chance?
perhaps the solenoid pack plug has frayed wires? and disturbing them a bit during a flush was enough for some bare wires to touch each other.

for starters,inspect the fluid level and that plug.
then grab yourself an old school OBD1 code scanner (found at just about any good auto store for around 20-30 bucks - it's worth having with this trans) and grab the code(s.) let us know what ya find.
perhaps the fluid flush dislodged old gunk on very old fluid and is now someplace where it shouldn't be.but no point in jumping to conclusions.

 

Yes my Speedo is all over the place jumping and than sitting at 0 than jumping again.

 

oh ok.well that's some bad timing lmao! right after a trans flush something like this all the sudden happens and your like oh no.

well not to fear.the speedo issue is unrelated.that's your trouble and why she's searching all over the gear range.
don't drive her anymore like that!
the trans needs to know your vehicles speed in order to place you in the right gear.
most common issue is a failed VSS sensor.it's located in the rear axle on your '93.at the very center and up most part of the rear differential you'll see a wire and sensor.the sensor is held in place via a bolt (1/2 socket on a 3/8 drive) and also is held/sealed via an o-ring.if your careful and use some penetrating oil,you can wiggle it free and remove the sensor without braking it.slid it up out,and see if it's covered with metal filings from ring/pinion ware.if so,just wipe it off and put it back in.most likely it has failed though by your description of the speedo action,and you'll need to replace it.
VSS = Vehicle Speed Sensor.they can be purchased at most any auto parts store,and will likely be in stock.

also note first however,the wires going to this sensor.if those are frayed,it may just be a matter of repairing those.
i had it happen once with my dump bed hoist.shorted 'em right out and speedo/trans went crazy.had to limp her home nice an easy at about 25mph.

if this doesn't solve the issue,the PSOM = Programmable Speedometer/Odometer Module may be the culprit.

in light of this new info,you can skip the code scanner for now.you know the issue at hand anyway.
once the VSS wires or sensor is replaced,start the truck and see if the flashing light is no longer.if it's still flashing,disconnect the battery at the passenger side (positive) for a couple mins.this will clear the code.go for a test drive,carefully watching your speedometer.if the speedo act's up again,quickly shift into N and come to a stop.put it back in D and limp it back home.if your not careful here you can really cause a lot of damage to the trans internals by letting it bang into wrong gears of course.then it's back to figuring out what else is causing the erratic speedo.

edit,
of course i should state the obvious...........check the fuse first.
sorry,my owners manual is out in the truck. you've got one right? i'm pretty sure it's on the inside of the fuse cover too,and course searching here and you can find it probably too,or someone else who knows may kindly post the fuse # for ya as well.

good luck.post back when you get 'er.

 

Thanks alot for the info. I will do all that as soon as I can. I will wrk on her sat and let you guys kno the turn. If there is any more info it would be gfeatly appreciated

 

Ok so I just replaced the sensor. Od light is still flashing Speedo does not work still and abs light still flashing. What next?

 

bummer.couldn't be easy could it.well could be the PSOM.
have a look here,focusing on post #54:
Speedo, Odo, Weird Shifting, How lame. - Page 3 - FSB Forums

meanwhile remembering you had the trans flushed recently.might want to double check with the person who did the flush,if they happened to disturb any wires,or try and get some info from them that may help point you in the direction of a possible bad wire that got disturbed since this happened the very next day after the flush.

 

I would say 9 times out of 10 replacing the VSS does not resolve the issue you are experiencing. The signal from the VSS is sent to the RABS controller on it's way to the PSOM. The PSOM divides down the signal for use with the speedometer and computer (PCM).

The most common root causes are 1. the RABS control module is dragging down the VSS signal before it gets to the PSOM or 2. the PSOM is bad.

You can remove the connector leading to the RABS controller, should be mounted behind the glovebox. Then drive the truck to see if the problem is resolved. You can also measure the VSS signal at the PSOM input with a DVM. Jack up the rear, block the front tires, have a helper bring the speed up to ~30 MPH verify the voltage linearly increases to ~ 3.5 Volts. If there is no voltage then you more than likely have an open wire. If the voltage is low, unplug the RABS module, repeat the test. If the voltage rises to within range that means the RABS is bad.

If the voltage is within range before disconnecting the RABS then you have a PSOM problem.