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1996 Saturn SL1 transmission

Tiny
DSPAZIOSO74
  • MEMBER
  • 1996 SATURN SL1
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 77,000 MILES
I have a 1996 saturn SL1 1.9 SOHC auto transmission it has 77,000 miles on it the transmission was acting up. Our computer indicated the 3rd and 4th gear ratio was incorrect. After researching the codes which I cant remember them now but the solution was suppose to be the input shaft speed control sensor replaced it and it didn't fix the problem. Did some further research on the web and someone with the same codes described the same problem said the PCM was bad. So I went online found a referb with matching numbers that was tested before it was sold to me put that in and still no luck. Any ideas.
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Friday, April 8th, 2011 AT 9:53 PM

11 Replies

Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
The two things you have replaced so far hardly ever go bad.I need the exact code numbers you have get your car scanned. You most likely have a pressure issue. Do you have a delay or bang into reverse?
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Friday, April 8th, 2011 AT 11:31 PM
Tiny
SATURNTECH9
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If the only two codes that came up were the 3rd and 4th gear ratio codes those are codes p07033 and P0734. Let me know so we can figure this out. Saturns are specialty Please post all your response on this posted question.
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Saturday, April 9th, 2011 AT 12:20 AM
Tiny
DSPAZIOSO74
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My friend who scanned the car for me said it was th P07033 and P0734. The car is at his house and he will scan it again in the morning to double check but he said those are the codes
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Saturday, April 9th, 2011 AT 12:28 AM
Tiny
SATURNTECH9
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  • 30,870 POSTS
So do you have a delay or a bang into reverse?Your are going to need to get a transmission pressure test kit if you are going to diagnose this car.Here is the set i have its the otc one i love it.You can find a cheaper one i also posted the link to that one. With the otc one you get two gauges more adapters and quick release hose which is nice.

http://www.amazon.com/OTC-5610-Transmission-Engine-Pressure/dp/B000R5G0DO/ref=sr_1_5?ie=UTF8&qid=1302309171&sr=8-5

http://www.amazon.com/Advanced-ATD-5550-Automatic-Transmission-Pressure/dp/B000OUZBZ0/ref=sr_1_2?ie=UTF8&qid=1302310128&sr=8-2

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Saturday, April 9th, 2011 AT 12:52 AM
Tiny
DSPAZIOSO74
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  • 5 POSTS
I will check on the delay or bang when I put it in reverse. I dont recall if it does that or not. Like I said earlier the car is at my friends house. Once I get one of the recommended pressure test kits what is it I'm testing? I understand the pressure, but what is the normal pressure? If the pressure is not correct how is it corrected? Are pressure issues correctable without rebuilding the transmission? Where do these gauges plug into the transmission? Sorry about all the questions?
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Saturday, April 9th, 2011 AT 1:47 AM
Tiny
SATURNTECH9
  • MECHANIC
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You will remove the air box in front of the battery look down you will see your transmission filter to the left of it is your transmission temp sensor its small with two wires going to it. Unplug the sensor and then unscrew it. Then screw the transmission pressure hose in where the sensor came out of. Then start the car and let it idle in park you should see about 60psi then take out the line pressure fuse out of the under hood fuse box then you should see over 200psi. Then put the fuse back in turn the car off and restart the car. Let the car get up to 1/2 way on the temp gauge then check the pressures again like I told you. Yes there is ways to correct the pressure without taking the transmission apart as long as the pump is good. There will be other steps you will have to do after the pressure test. Do you have a air compressor?
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Saturday, April 9th, 2011 AT 2:13 AM
Tiny
DSPAZIOSO74
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My friend does have a compressor. He will be able to do all the things you have said so far. Once we get the numbers from your first set of instructions I will get back to you with the results. Thanks for your help.
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Saturday, April 9th, 2011 AT 2:18 AM
Tiny
SATURNTECH9
  • MECHANIC
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Your welcome keep me posted.
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Saturday, April 9th, 2011 AT 2:33 AM
Tiny
DSPAZIOSO74
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I spoke with my friend and said the car shifts smooth into reverse. No delay or bang
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Saturday, April 9th, 2011 AT 2:55 PM
Tiny
SATURNTECH9
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Alright let me know what you find with the pressure.
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Saturday, April 9th, 2011 AT 4:06 PM
Tiny
SATURNTECH9
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Here is some gauges.

http://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Dautomotive&field-keywords=transmission+pressure+&x=0&y=0
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Sunday, April 10th, 2011 AT 3:10 AM

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