Mechanics

TRANS NOT SHIFTING

1994 Saturn SW2 • 93,000 miles

Transmission stuck in 3rd gear. No shifting, hard gear engadgement, no lockup of torqe convertor, no error codes from computor trans shop said internal wiring harness needs repair replace, I cant find internal harness listed anywere as part. Solinoids in valve body check out(ohms). Not a bad solinoid bus plate! Estimate says shifter indexing correct. Could this be a shift indicator switch problem (have not checked switch yet, hard to get to) seems to me like a ground problem all fuses good, trans relay good. May be ground strap to trans? Car starts in third with no shifting no tc lockup no overdrive and harsh reverse engadgement trans does not downshift when lower gears are selected wile driving. Trans shop said it is a minor problem (but wont be specific) if I can repair it myself it would save a bit of money.
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Hawknapp
March 24, 2012.



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!

Tiny
Hawknapp
Mar 27, 2012.
I need the info I asked you for?Also the link to the pcm you found?

Saturntech9
Mar 27, 2012.
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?

Tiny
Hawknapp
Mar 27, 2012.
Is the 1994 SL2 a automatic also?If so it will probably work. Also does the two top numbers match yours?If they do give it a try. You for sure have pcm ethier way.

Saturntech9
Mar 27, 2012.
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!

Tiny
Hawknapp
Mar 27, 2012.
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

Tiny
Hawknapp
Mar 31, 2012.
This computer came out of a twin cam engine like yours correct?If the donor car had abs/traction control and yours didnt thats why you have a code 81. Your best bet would have them change the options in your computer for no abs. You can do that at the dealer. That way you wont have to live with the check engine light and will know when something goes wrong other then the no abs. Is the code 25 a engine code or a transmission code?There is that same code in both systems. The 26 is quad failure meaning something on the quad circuit has failed. It covers a lot egr solenoid canister purge solenoid speedometer cooling fan power seat belts check engine light etc.

Saturntech9
Apr 1, 2012.
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!

Tiny
Hawknapp
Apr 1, 2012.
Iam postive the quad circuit has nothing to do with the brakes that I know of. Whats funny is the code 26 started when you changed the pcm?Could be something there then.70 is about right to reflash the pcm about 1hr labor. Also heres the bad news with the check engine the car is going to automatically fail your etest. If the lights on for any reason it fails.

Saturntech9
Apr 2, 2012.
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