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milansky

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Posts posted by milansky

  1. On ‎24‎. ‎8‎. ‎2017 at 4:44 PM, OldCadTech said:

    Yes, it is possible but as I recall, you did not have a lot of debris in the transmission prior to the rebuild. There is actually 2 different fluids in the torque convertor. There is a viscous convertor fluid that is very thick and if it leaks into the transmission fluid it turns the trans fluid to a very dark color.

    GM came out with a notice against using shop rags to clean transmissions a long time ago. If the debris you found was shop rag material you may have to clean the valve body a few more times to remove all the material.

    Hi, looks like transmission is getting stuck due to some kind of debris causing problems in lower valve body. It is probably being sent into tranny from torque converter so we are planning to flush the tranny by running engine and letting fluid exit through the auxiliary cooling radiator in the front. But I have another problem regarding engine which is occurring when engine is cold and that is - very rough idle and engine stall, almost. When engine is hot problem disappears. The collant is disappearing as well as so it might be blown head gasket that was changed - 100 miles driven on new one. Im very concerned about FEL - PRO quality of head gaskets form ROCKAUTO that seem to give up. When removing intake manifold I found oil present on valves. Could that be seals on valves in camshaft?

  2. 16 hours ago, OldCadTech said:

    Check that big transmission connector....

    Regarding that tranny stuck in second gear. When replacing lower valve body we again found and removed some dirt - debris like from a cloth used for wiping parts clean. Question stands: is it possible for torque converter that had not been replaced or thoroughly flushed to send debris into valve body or somewhere else and cause blockage?

  3. Hi guys, here is the update after few weeks of waiting for parts. As mentioned in previous communication, Cadillac Seville has been suffering with "Stuck in second gear" condition, ABS and TRACTION CONTROL light on. Used EBTCM unit (the brain part) replaced = ABS and Traction control light is GONE, car breaks normally. New LOWER VALVE BODY put in transmission = car works and shifts as smooth as before. Happy, car fixed after 4 years of on and off finding what was wrong with it. Next day car is stuck in second gear again. I mean WOW. What the ... 

  4. On ‎12‎. ‎7‎. ‎2017 at 5:38 PM, BodybyFisher said:

    Good luck, anxious to see your results

    Hi guys, here is the update after few weeks of waiting for parts. As mentioned in previous communication, Cadillac Seville has been suffering with "Stuck in second gear" condition, ABS and TRACTION CONTROL light on. Used EBTCM unit (the brain part) replaced = ABS and Traction control light is GONE, car breaks normally. New LOWER VALVE BODY put in transmission = car works and shifts as smooth as before. Happy, car fixed after 4 years of on and off finding what was wrong with it. Next day car is stuck in second gear again. I mean WOW. What the ... 

     

  5. 0Line pressure test update: minimum and maximum line pressure as listed in GM manual within required limits in Drive Park Reverse and Neutral.

    List of codes available: TC0027. TC0073. P0741. AC1340 and codes involving memory alive.... No codes for shift solenoids.

    Sonnax company is asking for ridiculous money just for tool set in order to install valve body rebuild kit so better choice is going for a rebuilt lower valve body unit with guarantee for 239$. 

    When changed along with EBCTM unit will let you about car's behaviour. Thx for help on this so far.

  6. 3 minutes ago, OldCadTech said:

    If I was working on this vehicle in 1996 the first thing I would do is pull the 1-2 solenoid and shift valve.

    The transmission really doesn't care if the ABS/Traction Control is working or not....

    I will provide VIN tmrw. Car is at the shop. You are right I will speak to transmission guy and we ll go for lower valve body. Solenoids are fine so we check again valves and springs.

    16 minutes ago, OldCadTech said:

    The reason I ask its origin and requested the vin is the GM export Seville was different. I don't know about the trans codes etc, I'm thinking those would be the same but they were a different beast in a lot of ways.  @Logan is wayy more familiar with the differences than I am

    52 minutes ago, OldCadTech said:

    There are 4 transmission DTC type "A" codes that the PCM's algorithm determines are serious enough to prevent further damage to transmission and restricts 2nd gear only.

    P0751 - 1-2 shift solenoid valve performance

    P0753 - 1-2 shift solenoid circuit electrical

    P0756 - 2-3 shift solenoid valve performance

    P0758 - 2-3 shift solenoid circuit electrical

    Clear. The only transmission code remaining is P0751. Apart from that are TC related 0027 and 0073. Rest of it is my notes at transmission shop. The thing is that the guy has done a research on that transmission and he is also suggesting that EBCTM unit is delt with first to see how transmission reacts after that. The problem here in Europe is we dont have sufficient testing equpiment for GM cars of that age 1996 model so we have to go step by step. I have fluid flow charts printed out for him so hopefully we will find out what to do next.

  7. 2 minutes ago, OldCadTech said:

    There are 4 transmission DTC type "A" codes that the PCM's algorithm determines are serious enough to prevent further damage to transmission and restricts 2nd gear only.

    P0751 - 1-2 shift solenoid valve performance

    P0753 - 1-2 shift solenoid circuit electrical

    P0756 - 2-3 shift solenoid valve performance

    P0758 - 2-3 shift solenoid circuit electrical

    Clear. The only transmission code remaining is P0751. Apart from that are TC related 0027 and 0073. Rest of it is my notes at transmission shop. The thing is that the guy has done a research on that transmission and he is also suggesting that EBCTM unit is delt with first to see how transmission reacts after that. The problem here in Europe is we dont have sufficient testing equpiment for GM cars of that age 1996 model so we have to go step by step. I have fluid flow charts printed out for him so hopefully we will find out what to do next.

  8. 9 minutes ago, OldCadTech said:

    I agree with you on both statements, more with the second statement than the first. I agree there are multiple problems, I also agree there are more than likely ground issue problems but there would have to be a shift solenoid code or valve problem for the PCM to restrict it to 2nd gear only. If he finds the paper with the code list it would help.

    The EBTCM was inop long before the second gear only problem.

    Hi. Will provide codes tmrw. Transmission guy has got my notes.

    Thx for patience

  9. 30 minutes ago, OldCadTech said:

    @BodybyFisher

    Are you mixing second gear start with second gear only?

    Transmission A codes are the only ones that will PREVENT it from shifting. Second gear start is completely different. Simply turning on Trac Control will force a 2nd gear start but the trans will shift to 3rd, 4th & lockup.

    Hi. Yes looks like I got it mix up. Sorry what is a transmission A code you mentioned? 

  10. 17 hours ago, BodybyFisher said:

    I posted 6 scans above to get you started, is that what you are looking for? YES that is it.

    I will post more later, there is some good stuff in this tech manual. Perfect

    Check all connections and the ground wire at the EBCTM unit, first, this could be a bad connection, we have seen that before.  Be careful with that connector, there is a latch type connector, don't force it, clean that connector with electronics cleaner and make sure its not wet from water, etc. YES, that has been done and is OK.

    Also, clean and inspect the main plug at the transmission and check the continuity between the PCM and the transmission.  Last summer I solved a 2-3, 3-4 shift problem on a 95 by cleaning the main connector. YES that has been done when doing that "TRICK" I mentioned above when testing shift solenoids, pressure solenoids, TCC solenoid + other inside.

    Good Luck

    When it comes to EBCTM unit, I will replace it anyway since there is no ABS function on brakes (have checked car behavior on light gravel, car is skidding like mad). Do you recommend changing just that "BRAIN" part on EBCTM or changing the whole unit with brake lines as well? I have been warned about buying this stuff from EBAY since when purchase is made, item is delivered first to family address in New Jersey and then send overseas so having faulty unit after 3 - 4 weeks would not make me happy. Any recommendations about reliable company for EBCTM units on the market? Lastly when EBCTM is replaced is PCM going to recognize it?

    Thanks a lot.

  11. 6 minutes ago, BodybyFisher said:

    As I suspected the 0073 code defaults to SECOND GEAR, see member Franey in this thread, he stays this

    "THE CONTROLER UNIT IS BAD. THEIR IS A SERVICE TECH BULLETIN OUT ABOUT THESE CONTROLLERS FOR CERTAIN VIN NUMBER CARS, Defective after a certain amount of time, IF , it is bad the only alternative is having it rebuilt . or buying a new one. IT will start coming on more often, when it does it defaults the car to taking off in second gear and disengages the traction control. I have the been their done that T SHIRT on this problem. This simple test will show that their is a short inside the module."

     

    Appreciate that. My transmission guy has warned me already that if pressure testing is within limits he is refusing to take furter responsibility unless I have TC control sorted out so it looks like Im gonna have to do some ebay or rockauto.com searching for rebuilt EBCTM unit. On tuesday I will know more after he gets line pressure checked. Thx

  12. You guys are great in helping out. I did send you my email in private message through this forum 3 times so it apperantly had not arrived. Pls use this email: milansky77@hotmail.com 

    Regarding TC 0073 code. Is that code requring replacement of EBCTM unit?

    I will get back to this post again at work from my PC since im using my mobile to reply most of the time while Im on the road. 

    Thanks again for your help

  13. 10 hours ago, BodybyFisher said:

    There are a few items that can cause second gear starts one of which is turning traction control off.  I see there is a traction control code 73 regarding communication with the PCM, I have been scanning the manual, but if the simple act of turning off the TC can result in second gear starts, a 73 communication fault affecting the delivered torque vs requested torque most certainly could result in a 2nd gear start to protect the tranny

     

     

    Yes there is TC 0027 and TC 0073

  14. 13 hours ago, OldCadTech said:

     

     

    @BodybyFisher  Thanks Mike for chiming in :)

    I think the above quotes cover most of it. The TCC is not the main issue at all, the no shift is. At this time we still have more questions than answers

    The transmission was rebuilt after this happened by somebody 

    The malfunction is still present. The guy that did the trans rebuild is ready to "open" the trans back up. I'm still waiting for line pressure results but if the line pressure and the solenoids are good it has a check ball out of place or a valve is stuck in its bore. The 12v "Trick Test" of the TCC is almost certainly a death sentence for the TCC solenoid which is a PWM solenoid and the shift solenoids "tests" warrants another exam of the shift solenoids and related wiring for damage while the trans is disassembled, and/or possibly a PCM replace. That 12v "test" and ground switching went somewhere.

    In a perfect scenario, and all the solenoids are good, there is still the possibility of low line pressure, of a stuck 1-2 shift valve, a stuck TCC control valve, a malfunction that causes the trans to default to 2nd gear. The TCC issue should be fixed also, the PCM is still seeing excessive TCC slippage. Do it now or take it apart again later.

    I haven't seen a P0751, P0753, P0756, P0758 mentioned, so that is a little strange but it may still be on the paper when he finds it. That would explain a lot.

    As I said earlier too many questions and not enough answers.

     

     

    Take it apart ONE last time and fix it right.

    Hi. After that TRICK I mentioned we rechecked all solenoids in transmission and they all show required OHM reading as listed in GM manual to make sure no death sentence happened. I should be getting colour diagram of fluid pressure to see how fluid flows within during shifting after selecting "D". This could help us figure out possible blockage somewhere not allowing first third and fourth gear. We are rejecting electrical faults and we are more and more assuming manual type of fault. Too bad so many kits on the market for transmission overhaul but none I found was including new springs or valves for valve body if that is assumed cause of second gear only situation.

  15. 1) Is this the same transmission case that was rebuilt or was another ( rebuilt ) transmission purchased and installed? It is the same case with all gaskets, seals, filters and solenoids replaced for new.

    2) Where was the transmission overhauled? At a private garage/service guy. I know it is risky but this supposed excellent. They say...Anyway he is ready to open it again.

    3) Was the torque converter replaced?  NO, before transmission was removed converter was checked for slippage at dealer claiming there is no need for converter replacement. How a dealer done the testing I have no clue

    4) What is the line pressure? Since Im based in Europe not yet we r looking for a proper adapter for line pressure port.

    5) What voltage were you applying to the shift solenoids and the TCC solenoid? 9v ? 10v ? 12v? 12V.

    6) How did you control the applied voltage? voltmeter

    7) Did you personally overhaul or assist in the overhaul of the transmission - if so, are you 100% sure all the check balls are in the correct locations? yes, technician was provided with original GM service manuals. This should be OK.

    8) A list of ALL the codes hard or soft, current or history. Cadillacs systems, and those of other vehicles also interact with each other Have to find my paper. Will get it later.

    When it comes to line pressure, does anyone have a color diagram where it is clear how fluid flows during gear changes? It would help to clarify possible causes for not having FIRST, THIRD and FOURTH gear.  

    Thanks, you guys are great.

  16. You are killing me on this one. Temperature was as listed in the manual after a short warm up. PCM damaged? That would mess the whole car up not? Engine runs smooth and all other electronics are fine too or r u talking about pcm damage of transmission section in the pcm only? Will check the transmission fuse again. Regarding question above. Car was running absolutely fine never had any issues with transmission at all. No hard shifts whining noise or any of that. As I mentioned before Caddy is just above 76200 miles. But one day after traffic light stop transmission gave up on me. 

  17. UPDATE: Both shift solenoids display required resistance 19 - 24 ohms (reading at 21,8 ohms). So we did one tricky thing. We clipped onto a wire (Engine side end) from 1-2 solenoid (light green) + 2-3 solenoid (yel/blk) + TCC solenoid (tan) + ground connection to manually command a shift. We made something like a switch board to which our wire clips were attached and took it for test drive. In "D" - solenoid A ON  solenoid B OFF in first gear, in second gear A - OFF, B OFF, in third gear A OFF - B ON, in fourth gear A ON - B ON. Commanding through those switches did not change a thing so basically car was still in second with no change in rpms like of you had stick shift and changed your gear/speed by depressing clutch and upshifted by hand manually. So it is not electrical issue- shift solenoids or TCC.

    Does someone have a color diagram that would show how fluid travels within transmission when "D" is selected? There might be some kind of miniature blockage in valve body or something. Thanks 

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