Transmission stuck in 3rd gear problem

I did not wait long enough. Check engine light eventualy gave code 11(trans codes) then coolant light gave code 56

Yes code 11. Here is the order. Code 12. Code 25. Code 11 then on coolant light code 56. I may need to take a test drive and check again as I had disconected the battery (reseting codes).I will do this and check again. Will let you know!
THANK YOU!

YES. Transmission code 56. I could use some help finding a used pcm from ebay-craigs list. Havent priced a new one yet(im afraid to $$$!) But I bet it's similar to the price they gave me for "internal wiring harness" on my estimate, estimate also says "coolant level light on but coolant was not low" it takes quite a while for the trans codes to manifest so I was not waiting long enough (no ce light to watch. Taped)but trans shop would be familiar with this and I think they most likely read the code! Pcm is an easy swap so they most likely didn't tell me the pcm was bad (bad for "their" profit margin")if it is the pcm im going to give them a good talking to! I would have gladly paid the 29 dollars for information instead of their wonderfull "free" diagnosis (but they would have only made 29 bucks instead of the 279 dollars on the estimate)there's that "profit margin" again! Im going to price a new one for the hell of it, but a used one would do. Thanks again. It's nice to know there are some good folks left in the world. God knows we need them!

Can I use a pcm from a 94 sl2 in my sw2!

Ats is plugged in and connector looks ok do not have cruise control no abs dont know what ir is but here are the numbers off pcm

21022763 21022421
perf-auto service no.

862763m340260037
this number is under the bar code!

Pcm I was asking about is in a wrecked 94 sl2 of my brothers friend thought about swaping out with mine to see if this corrects problem(my luck is you cant). Did you see the numbers off my pcm. I think we're out of sync. Auto zone quoted me 245 bucks for a new one (with core return)YIKES! And you say it will have to be programed first? I guess I will have to compare numbers between them first, is that correct?

Ok ill get a hold of that pcm and check the number(it is an automatic) if perf-auto and service no. Are the same ill plug it in and see if I have corrected the problem. But I am almost positive he will want it returned so keep looking for one for me(if you would be so kind) you have been marvelous! THANK YOU!

After some time I have located a pcm same year same numbers on pcm as original and installed it in my saturn. Transmission problem GONE! Shifting is very smooth now, over pressure problem had been going on for some time but did not notice it(transmission seemed to go into overdrive somewhat hard at low speeds CLUNK!) This is also gone. But I still have a few problems. Obd system is now not giving code 25 (i guess that's good)but I am getting code 26 (quad driver mod a fault)and code 81(tcs fault) even though the numbers match on the pcm, s I think I may have gotten one from a car with tcs/abs. My car does not have tcs/abs. This would explain code 81 am I correct? Also the quad driver fault is due to the fact that pcm does not "see"the tcs/abs as there is none installed (open circuit fault) am I thinking correctly or am I up a tree! The question is if im correct will this affect driving my car! (I can live with the "ce" light or perhaps some black tape please.)Id hate to break something, repair was cheep ($27.00 bucks. Cant beat that)but as part came from a bone yard im still aprehensive? Can you shed some light on this for me. You were ABSOLUTLY RIGHT on the pcm YAAAA! If I can go forward from here into the saturn sunset of driving destiny it would be great but demons may still lurk under my hood! Please get back to me THANK YOU!

HAWKNAPP

Twin cam engine yes. Code 25(was)an engine code(its gone now)you say the quad circuit does not deal with the abs?(I must have my car e-tested tomorow to get a new sticker)i suppose if it fails il check those emission systems if it does not pass ill have a start on why! Ive been told that flashing the computer is expensive, aprox 70 bucks, is that rite? I ASSumed that that quad driver was due to componenets of the abs system not being present, but that code 25 (ats sensor out of range high)going away is quite strange? So you say that quad fault A has nothing to do with the abs? Everything else seems to be working(egr solenoid, canister purge solenoid not obvious)but all other systems are working(spedo, bulbs, seatbelt, cooling fan)if it definatly is not abs ill have to check those solenoids(have to do double time if I dont pass e-check, tags expire on the third).I will look in my haynes manual wiring diagram to see if quad includes abs system (or your answer on abs-quad question)if its not on the quad driver ill have to start looking! Please get back to me. THANK YOU!

My son just bought a 94 sw2, Automatic tranny. When driving and you slow down, the check engine light comes on and it does not shift into third.(Kinda like limp mode) If you pull over and shut the car off then restart it. Its fine for a few. It does only happen after the car warms up. Also when you put it into reverse you have to step on the gas in order for it to engage in to it. Checked the codes when light was on and had code 23 (no 3rd gear I believe). Any idea would be a great help' Thanks.
Brent

Thanks for the response. I'm currently in college for Automotive but dont have much experience with diagnosing transmissions. I have access to a transmission pressure test kit and know how to use it. What should it read and is there a step by step site I can go to on how to test the gear clutch pistons? Thank you so much!