jjmancini Posted August 4, 2005 Posted August 4, 2005 Hey everyone! I was curious if I could get some help. My Car: 1990 Lexus LS400 225,000 miles My transmission (I believe) is being very jumpy. When I accelerate... the tach will go up just fine in first gear, but as soon as it shifts, the tach stops at 2.2 RPM's. And no matter how hard I press the gas pedal or even if I punch it, it will not move, I have to take my foot off the gas pedal, then wait a couple seconds before it can accelerate again. This happends about 3 out of every 5 times the car goes through second gear. Anyu ideas? Tranmission? Brain? Chip? Thanks in advance!
SKperformance Posted August 4, 2005 Posted August 4, 2005 Sounds like low fluid pressure either low on tranny fluid or a clogged valve body.
SKperformance Posted August 4, 2005 Posted August 4, 2005 also wait about 24 hours before asking for anymore ideas as most response are from members who are only on once a day.
jjmancini Posted August 4, 2005 Author Posted August 4, 2005 Ahhhhhh..... good thought! Thanks SK. Well I took it to the shop and had them drop the pan and clean it out really good and put back in 5 quarts of fluid. So we will see what heppends. Thanks for the thoughts. If there are any other thoughts please let me know.
nc211 Posted August 4, 2005 Posted August 4, 2005 You're sure they used toyota approved transmission fluid right? That's one thing you don't want to mess with on these cars, is shelf brand tranny fluids.
jjmancini Posted August 4, 2005 Author Posted August 4, 2005 Yeah... I'm pretty sure they are. Becuase they called me up and said "You know, they require a certain type of Tranny fluid. We had to get it from out other store." It was $9.99 a quart. Crazy. So I think they did. Thanks!
VBdenny Posted August 5, 2005 Posted August 5, 2005 Sounds more like an electronics problem? Do you think the RPM's are higher than what the tach displays?
jjmancini Posted August 5, 2005 Author Posted August 5, 2005 No the car's RPM's are definitley what it displays. You can feel it. I push the pedal and there is no acceleration. It's like it is stuck.
GRAND_LS 4 Posted August 5, 2005 Posted August 5, 2005 Yeah... I'm pretty sure they are. Becuase they called me up and said "You know, they require a certain type of Tranny fluid. We had to get it from out other store." It was $9.99 a quart.Crazy. So I think they did. Thanks! ← Damn, thats how much they sell them at the dealer. Buy them from a Toyota dealer for 3-4bucs.
jjmancini Posted August 5, 2005 Author Posted August 5, 2005 Well, I got the car back. It does not seem to run much better. Any thoughts? Could it be the transmission itself? Could it be the brain? Electrical? I'm really at a loss now. The symptom that has become more prelevant is not the "OD off" light blinks on and off steadily on my dashboard. Thanks!
nc211 Posted August 5, 2005 Posted August 5, 2005 Could the torque converter possibly be sticking, or going out?? Just thinking outloud. Do you get a fuel smell from the car, like maybe your cat's are clogged up and preventing the car from revving up? drive it a little, and then look under the car at the catoletic converters, are they glowing red? I'm at a loss amigo. I'd say have it professionally checked out...by a LEXUS shop..not the dealer. On a 1990 model, they'll tell you anything to get you trade it in and buy a newer one.
jjmancini Posted August 5, 2005 Author Posted August 5, 2005 Hmmm.... I don't think it is the tourque converter... it really feels like a transmissions thing. But... I have always taken my car to the dealer. Is there anyway of finding a Lexus shop in my town of Albuquerque New Mexico? Thanks for the post nc11. It is just a weird problem. I still think it is the tranny or something electrical. Please keep the thoughts coming. I need all the possible diagnoses I can get. Thanks again!
jjmancini Posted August 10, 2005 Author Posted August 10, 2005 Any new thoughts? If none... how should I get this diagnosed? Without having to pay an arm and a leg at the Lexus Dealer...
bjkilpa Posted August 10, 2005 Posted August 10, 2005 Any new thoughts?If none... how should I get this diagnosed? Without having to pay an arm and a leg at the Lexus Dealer... ← I have the same problem with my 1991 LS 178,000 miles. Its intermintent and only does it when its real Hot out (90degrees) and the car is fully warmed up. I also just replaced the transmission fluid and the transmission filter. However, I used Dextron III fluid( the valvoline website says the dextron III is fine for this car, but not totally sure). What I think is happening is the transmission is shifting from first gear directly into 4th gear instead of going to second and third.. I am assuming the computer must be gettting bad signals from some sensor to cause this to happen, or a problem with the valve body. I need help on this issue also, I dont want to pay the Dealer more than the car is worth to get it fixed.
jjmancini Posted August 10, 2005 Author Posted August 10, 2005 Yeah!!! Shifting straight from first to 4th. That is exactly what it feels like. Can we just replace the brain?
bjkilpa Posted August 10, 2005 Posted August 10, 2005 Yeah!!! Shifting straight from first to 4th. That is exactly what it feels like. Can we just replace the brain? ← This is where I need help also, I have the repair manuals so I can see if there are any codes that the transmission is putting out. I can only guess that the throttle position sensor or other such as the temperature sensor may be malfunctioning, or the transmission computer. Ill do some more homework to see if I can isolate the problem.
SKperformance Posted August 10, 2005 Posted August 10, 2005 Did either of you check the transmission kick down cable on the throttle body to make sure it is in tolerances?
jjmancini Posted August 10, 2005 Author Posted August 10, 2005 No Idea what that is.... How do I check?
SKperformance Posted August 10, 2005 Posted August 10, 2005 Look at the throttle body there are 2 cables one goes to the gas pedal the other one goes down to the transmission. Make sure it is moving freely and not rusted or disconnected.
bjkilpa Posted August 11, 2005 Posted August 11, 2005 Hey everyone!I was curious if I could get some help. My Car: 1990 Lexus LS400 225,000 miles My transmission (I believe) is being very jumpy. When I accelerate... the tach will go up just fine in first gear, but as soon as it shifts, the tach stops at 2.2 RPM's. And no matter how hard I press the gas pedal or even if I punch it, it will not move, I have to take my foot off the gas pedal, then wait a couple seconds before it can accelerate again. This happends about 3 out of every 5 times the car goes through second gear. Anyu ideas? Tranmission? Brain? Chip? Thanks in advance! ←
bjkilpa Posted August 11, 2005 Posted August 11, 2005 I Just got a breakthrough. I Have the same problem, and I just checked the codes on the diagnostic port for the transmission and I have a Code 63. This means that solenoid valve number 2 has a short circuit or Open. When this happens the transmission goes into Fail safe function and directly shifts into Overdrive (4th gear). I bet I need to replace solenoid number 2, the electrical cables or the ECU. I an sure the solenoid itself is bad.
jjmancini Posted August 11, 2005 Author Posted August 11, 2005 Whoa! Awesome!!! please let me know when you do this and how much it cost, unless your doing it yourself. I would love to get this problem fixed.
bjkilpa Posted August 11, 2005 Posted August 11, 2005 Isnt the internet great!! I just found the Part number to solenoid number 2 its (8542050020)(same part number as solenoid number1) at lexus its $229.00 list and toyota has the same part and its $199.00. I will try and replace it this weekend and see if it solves the problem on my car. If you have the repair Manual, you can get the error codes from the transmission and see if you have the identical problem. On yours it could be solenoid number 1 or Number 2.
SKperformance Posted August 11, 2005 Posted August 11, 2005 Most times all you need to do is remove and clean the solenoids sa they get small bit of debris causing it to not open or close the channel completly to reroute the fluid as intended. Becareful when removing the valvebody to not let any clips or check balls fall out of place.
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