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Old 02-14-2012, 12:51 AM   #1
lmpeejay
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Happy Could my transmission be slipping

Some may have followed the chronicle of my car trouble...but here is the summation. My car sat dormant for about 4 months awaiting a new battery. We have one and the engine purrs like a kitten. But there is on occasional and inconsistent jerking on acceleration. This happens in conjunction with a spike I the RPMS I have notices that this happens more frequently on 3occasions.

Cold start, hills (up and down) and after prolonged driving. It has been suggested that it was my coil and sparks but I think that would affect performance consistently...not just on acceleration.

Could this be caused by low transmission fluid...and should I get an exchange of a flush?

I welcome any and all thoughts.

PJ

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Old 02-14-2012, 01:01 AM   #2
ssewall
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2002 SL2
Default Re: Could my transmission be slipping

year/model/miles?

Is this happening only during gear shifts?

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Old 02-14-2012, 01:03 AM   #3
lmpeejay
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Default Re: Could my transmission be slipping

2001 sl 4door sedan... Yes it happens on or about gear changes

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Old 02-14-2012, 01:12 AM   #4
ssewall
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Default Re: Could my transmission be slipping

Two strong possibilities:

-The Saturn transmission acts all kinds of crazy when it's not getting the power it wants. Ensure the new battery is fully charged, there's no corrosion on the posts or cables, and that they're tightened down (not over-tightened) pretty snugly. If you've ever removed chassis grounds make sure they got re-installed.

-A failed line pressure solenoid in the Valve Body. If you get a "clunk" going up hills, this is probably the problem. It's also a common issue on the gen-3s (2000-2002). It's a medium difficulty DIY job to test the solenoids as well as replace them if they turn out to be faulty. You'll need a socket set and a multitester. Also a torque wrench if you decide to replace the solenoids yourself.

Here's how to test:

http://www.youtube.com/watch?v=1tDmBlKn2jI

Here's how to replace:

http://www.youtube.com/watch?v=JUSSj_2eHUY


Don't let a shop tell you you need an entire valve body.

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Old 02-14-2012, 08:48 AM   #5
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Default Re: Could my transmission be slipping

Thank you....
I have not the skill set to do it myself, but I know an enthusiast who does, since it seemed the shops were guessing, I wanted to consult the experts - the clunk was key, I never thought about that but now that you mention it...it has been there for a while.

That's for the help.

PJ

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Old 02-14-2012, 09:50 AM   #6
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Default Re: Could my transmission be slipping

Before tearing into the xmission, try something simple; blocking off the egr valve ports underneath it. Use sheet metal, coins or soda can (aluminum will melt eventually from exhaust heat). This temporary blocking gasket removes the egr valve from interfering with normal engine running during acceleration and cruise. If the egr valve is the cause of this problem the temporary blocking gasket will show an immediate improvement. No improvement means the problem is elsewhere. If its the egr valve then it will need cleaning or replacement.

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