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Old 04-06-2008, 12:44 AM   #1
KingRex
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1994 SL2
Default Valve Body or bad transmission?

I've been using my SL2 more and more recently, and I've noticed the transmission acts funny.

it doesn't have the reverse slam, and it shifts though all the gears, but it has a hard time getting in to OD at anything below 40Mph and over that, it'll stay in over drive but it'll shudder and the SES light will come on, once it slows back down the SES light will go out.

Anything below 40Mph, it'll jerk until it can get it self in to OD.

Is the transmission going bad, or does it just need the valve body replaced?

Fluid is clean, filter is new, level is correct.

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Old 04-06-2008, 01:04 AM   #2
Firehawk_1989
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1993 SL2
Default Re: Valve Body or bad transmission?

Sounds like a TCC (torque converter clutch) solenoid to me!

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Old 04-06-2008, 01:37 AM   #3
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1994 SL2
Default Re: Valve Body or bad transmission?

Quote:
Originally Posted by Firehawk_1989 View Post
Sounds like a TCC (torque converter clutch) solenoid to me!
How do I find out if it's that or not? It feels jerky though out the speeds. But it never stalls.

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Old 04-06-2008, 03:55 AM   #4
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1994 SL2
Default Re: Valve Body or bad transmission?

Okay after doing bunches of reading though the site, I'm TOTALLY CONFUSED.

Theres TOO MUCH!

Nothing I've read so far matches my problme!

I'm at a total loss right now, because I can drive the car, and it never stalls, it doesn't slam though any of it's gears, it doesn't have the reverse slam. It shifts though 1, 2, 3, and 4, and goes in to Reverse fine.

It keeps giving me a check engine light, but it goes on and off, sometimes it's off, sometimes it's on. It does this well driving, it never just stays on all the time. it does it hot, or cold. Seems worse when it's hot.

It has a hard time putting it self in to 4th great at lower rates of speed, 30 or so and below it has a hard time kicking 4th in, I can shift it down to 3, then to D, and it'll kick in and hold, shudder a little, then let go. Anything over 40 or so, it'll kick it self in to 4th and stay, but with a sluggish feeling, like something is pulling the car back, but it'll still maintain speed, and the RPMs don't change.

I'm confused. Is my valve body bad, dirty, what?? Is it the ECTS?

I hate Automatic transmissions!!

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Old 04-06-2008, 06:41 AM   #5
mac99sl2
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1999 SL2
Default Re: Valve Body or bad transmission?

The ECTS is ALWAYS where you start if it hasn't been replaced and you have drivability issues with any part of the engine or tranny. Its a $12 part and in most cases resolves issues that people think are much worse. Make damn sure that the two wire connector doesn't have ANY corrosion or green gunk in it. If it does then get the replacement connector from the dealer. Go get the codes read at your local Auto stoned or like store (free). Post your codes (in the title) and symptoms in a new thread. Sometimes a drain fill and filter will cure the issues and definitely cant hurt as these trannys should have it done every 30k miles. Once these things are done you should have a much better idea of what is really going on.

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Old 04-06-2008, 07:27 AM   #6
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Default Re: Valve Body or bad transmission?

It might help to figure your problem out, if you got the SES codes scanned, and posted the results of said scan here.

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Old 04-06-2008, 02:56 PM   #7
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1994 SL2
Default Re: Valve Body or bad transmission?

How do I get the codes from an OBD1 computer? The car is a 1992. Autozone can only read OBD II

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Old 04-06-2008, 04:37 PM   #8
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1995 SL2
Default Re: Valve Body or bad transmission?

Type in "paperclip" in the search window and it will tell you how.

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Old 04-06-2008, 05:59 PM   #9
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Default Re: Valve Body or bad transmission?

When you figure out how to perform the paper clip diagnostics you might want to think about something else that may seem like a transmission problem.

Have you considered the possibility of a clogged catalytic converter? A recent member just went through problems and finally posted a clogged catcon. It caused very strange symptoms that didn't relate to the converter and described more as engine/transmission troubles.

Know any good muffler shops that can test for a plugged catcon? There should be pressure on the exhaust pipe that won't allow your hand to cover the exhaust, more or less. And then there's the temporary removal of the O2 sensor with a LOUD exhaust to allow a brief test, long enough for you to observe whether or not the car drives better. If its still the transmission there won't be any change but problems disappearing would point to the catcon.

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Old 04-06-2008, 08:27 PM   #10
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1998 SW2
Happy Re: Valve Body or bad transmission?

Hi all, I didn't expect my first post on the forum to be a suggestion -- I've gotten a lot of good input from reading the posts and fixed a lot of the problems on my 98 SW2 auto tran.

Some of my issues were as KingRex described. After replacing the ECTS and TBS, cleaning the EGR valve and TB, as well as the Reverse Slam Fix, I was left with that OD shift and lugging problem in the same MPH range. SES light was intermittent as well. Turned out to be an erratic misfiring cylinder, in my case cylinder 2. New plugs didn't fix it, but new wires did. A fairly inexpensive fix, and one that would be beneficial even if it didn't cure the problem. I still don't know why it started out only in OD around 40 MPH, but it eventually manifested at all speeds and gears.

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