1994 OLDS Question
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Laughing Gas
Joined: Aug 2007
Posts: 1,132
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From: Baldwin, ND
1994 OLDS Question
I have a 1994 Delta 88 Oldsmobile with the 3.8 and auto transmission. I have a question about the tranny. I am not sure if this is the best place to ask but here goes.
I checked my tranny fluid level and it is about an inch above the full mark. Could that cause me to get a check engine light? I am curious because it has come on since I have had the car but it drives nice except for the power pulsation under light throttle inputs.
Is there a way to remove some of the tranny fluid without dropping the pan?
I know womeone is going to tell me to check the codes but both myself and the dealer are unable to retreive codes!
Thanks
Thad
I checked my tranny fluid level and it is about an inch above the full mark. Could that cause me to get a check engine light? I am curious because it has come on since I have had the car but it drives nice except for the power pulsation under light throttle inputs.
Is there a way to remove some of the tranny fluid without dropping the pan?
I know womeone is going to tell me to check the codes but both myself and the dealer are unable to retreive codes!
Thanks
Thad
Posting Guru
Joined: Feb 2004
Posts: 1,388
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From: Saratoga, NY
Well as far as removing the trans fluid..... you could loosen the pan bolts and let some drain out and hope the gasket don't leak afterward, or get some type of fluid pump to put down the dipstick tube. They make pumps that attach to drills (wal-mart) some by hand (harbor freight). You can also remove one of the trans cooler lines, get a drain pan and a helper, start the car and let some drain out that way.
The Check engine light prabably relates to your driving issue. I don't understand why a dealer cant retrieve codes, unless it isn't a GM dealer, or you aren't getting power to the tool or the dealer just sucks!. An overfilled trans can cause the fluid to aerate and cause shifting issues.
The Check engine light prabably relates to your driving issue. I don't understand why a dealer cant retrieve codes, unless it isn't a GM dealer, or you aren't getting power to the tool or the dealer just sucks!. An overfilled trans can cause the fluid to aerate and cause shifting issues.
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Laughing Gas
Joined: Aug 2007
Posts: 1,132
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From: Baldwin, ND
Yeah, I know that when I connected to it with my code reader it just said that it could retrieve codes. I then successfully tested the code reader on three other vehicles.....
I just am not sure....
I just am not sure....
Hotshot
Joined: Feb 2004
Posts: 11,697
Likes: 3
From: Marengo, Iowa
I have come to find that 94-95 were not the best years for diagnostics, even the GM dealers. Seems GM was playing games, the key for retrieving codes was too convenient, so then they made it tougher, to the point you had to have year specific readers. They removed the ground terminal from the plug, made it the shape of the OBDII, stupid stuff like that...
Cargo Master
Joined: Jan 2004
Posts: 2,512
Likes: 8
From: Cook Forest and Irwin PA
the 4T60/E (and the 440T4 it came from) can take 2 qts over full before it gets into the gear train - the real reason overfilling it bad, standing fluid into the gear train causes foaming and pressure loss.
1 inch over? dont worry about it.
now, your 94 might be the E model which could result in a pwertrain code - of which any competent shop can read for you.
1 inch over? dont worry about it.
now, your 94 might be the E model which could result in a pwertrain code - of which any competent shop can read for you.
Butt-Head
Joined: Apr 2004
Posts: 9,432
Likes: 2,919
From: Reed Point, MT
In 94, cars were dumb. I don't mean that in an ignorant, smart-**** way. The diagnostic capabilities were VERY limited. There are only certain things that will turn on a check engine light in a vehicle with OBD1 compliant diagnostic capabilities.
A hard circuit fault (open/short), a signal that should be seen when a certain output is controlled, or VERY limited "performance" codes like oxygen sensor inactivity or mass airflow codes that set when EGR valves are open but lower MAF is not measured.
Slightly over-full transmission fluid will not cause a code that a pre-OBD2 vehicle will recognize since very few transmissions came with "transmission pressure switches" until then (to monitor valve body operation).
A hard circuit fault (open/short), a signal that should be seen when a certain output is controlled, or VERY limited "performance" codes like oxygen sensor inactivity or mass airflow codes that set when EGR valves are open but lower MAF is not measured.
Slightly over-full transmission fluid will not cause a code that a pre-OBD2 vehicle will recognize since very few transmissions came with "transmission pressure switches" until then (to monitor valve body operation).
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Laughing Gas
Joined: Aug 2007
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From: Baldwin, ND
Cleatus12r
What sensors should I be looking to replace in an attempt to fix the issue? I dont mind replacing parts as I tend to consider it preventative maint......
What sensors should I be looking to replace in an attempt to fix the issue? I dont mind replacing parts as I tend to consider it preventative maint......
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Butt-Head
Joined: Apr 2004
Posts: 9,432
Likes: 2,919
From: Reed Point, MT
It's anyone's guess until watching the datastream while driving. I'm a GM tech and make a good living at it.....I'm a strong opponent of "throwing parts" at cars to fix them.
No Tech 1 available, huh?
No Tech 1 available, huh?
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Laughing Gas
Joined: Aug 2007
Posts: 1,132
Likes: 0
From: Baldwin, ND
Yeah, I agree. But at this point putting new parts on a 14 year old vehicle isnt a bad idea since I am pretty certain the girl that owned it before me just drove it and thats it. But I dont need to spend all that money if possible. I did however replace all the vacuum lines since that was a cheap fix and eliminates one source of problems......
The issue is a lack of "good" techs around here. I havent been able to find someone who was able to get codes off my vehicle even though the CEL comes on everytime I get in the car. Odd I know.
Although, I do get over 30mpg while on road trips so its not hurting mileage significantly......
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Laughing Gas
Joined: Aug 2007
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From: Baldwin, ND
Thanks
Thad
Cargo Master
Joined: Jan 2004
Posts: 2,512
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From: Cook Forest and Irwin PA
I have not seen any data that indicates it might be the tranny throwing a code. Your year really oughta be a 4T60E and unless the PCM is a OBD1.5, you can get the flashout with a paperclip.
Your 94 *may* have a PWM solenoid going south
Your 94 *may* have a PWM solenoid going south
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